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`The Complete Guide to Hot Tub Pumps
`The Complete Guide to Hot Tub Pumps
`
`By Matt Giovanisci By Matt Giovanisci || Updated: Updated: December 8, 2020
`
`
`December 8, 2020
`Hot Tub AccessoriesHot Tub EquipmentHot Tub Equipment / / Hot Tub Accessories
`
`
`
`You turn on your spa and hear a screeching sound. Your jets kick on, but barely any
`You turn on your spa and hear a screeching sound. Your jets kick on, but barely any
`water comes through them. Or the unimaginable—you turn on your spa, and absolutely
`water comes through them. Or the unimaginable—you turn on your spa, and absolutely
`nothing happens.
`nothing happens.
`
`It’s important to know how to spot signs of trouble, what steps to take to circumvent
`It’s important to know how to spot signs of trouble, what steps to take to circumvent
`preventable problems, and what to do when they crop up.
`preventable problems, and what to do when they crop up.
`
`What’s in a Hot Tub Pump?
`What’s in a Hot Tub Pump?
`
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`

`

`Before you try to fix or replace a malfunctioning pump, familiarize yourself with the
`Before you try to fix or replace a malfunctioning pump, familiarize yourself with the
`specifications of your hot tub pump. Most pumps have a label on the side listing the most
`specifications of your hot tub pump. Most pumps have a label on the side listing the most
`important technical aspects, such as horsepower (HP) and speeds. Other specs, such as
`important technical aspects, such as horsepower (HP) and speeds. Other specs, such as
`discharge type and size, can be determined just by looking at your pump.
`discharge type and size, can be determined just by looking at your pump.
`
`Variable or Single Speed
`Variable or Single Speed
`Every hot tub needs a pump that can power the jets and circulate the water. This means
`Every hot tub needs a pump that can power the jets and circulate the water. This means
`it needs both high and low speeds, which are measured in revolutions per minute (RPM).
`it needs both high and low speeds, which are measured in revolutions per minute (RPM).
`When a single pump can switch between high and low speeds, it’s called a variable-
`When a single pump can switch between high and low speeds, it’s called a variable-
`speed or two-speed pump.
`speed or two-speed pump.
`
`Some hot tubs have single-speed pumps, but in those cases, there are two pumps. One
`Some hot tubs have single-speed pumps, but in those cases, there are two pumps. One
`uses less
`, which runs at a much lower speed and uses less
`
`
`is called the is called the circulation pumpcirculation pump, which runs at a much lower speed and
`energy than any other pumps. Circ pumps, as they’re commonly called, only move
`energy
` than any other pumps. Circ pumps, as they’re commonly called, only move
`between 25 and 35 gallons per minute (GPM).
`between 25 and 35 gallons per minute (GPM).
`
`Even small variable-speed pumps typically move 100 GPM or more. The most powerful
`Even small variable-speed pumps typically move 100 GPM or more. The most powerful
`variable-speed hot tub pumps can move as much as 260 GPM.
`variable-speed hot tub pumps can move as much as 260 GPM.
`
`The second pump would function at a higher speed to power the jets in your tub. These
`The second pump would function at a higher speed to power the jets in your tub. These
`can be single or variable speed. Some two–speed pumps can even be configured for
`can be single or variable speed. Some two–speed pumps can even be configured for
`single-speed use in a spa that has a circ pump.
`single-speed use in a spa that has a circ pump.
`
`

`

`LAING E5 - 74427 Spa Circulation Pump -
`LAING E5 - 74427 Spa Circulation Pump -
`120V/240V
`120V/240V
`
`Buy Now
`Buy Now
`
`
`
`If you click this link and make a purchase, we earn a commission at no additional cost to you.If you click this link and make a purchase, we earn a commission at no additional cost to you.
`
`Wet and Dry Ends
`Wet and Dry Ends
`If water were to enter the motor portion of your spa pump, it could destroy the pump
`If water were to enter the motor portion of your spa pump, it could destroy the pump
`completely. In order to keep it moving water without frying the motor parts, every pump
`completely. In order to keep it moving water without frying the motor parts, every pump
`
`
`
`
`has a has a wet endwet end and a and a dry enddry end..
`
`
`As you can surely guess, the wet end houses the impeller which pushes water through
`
`As you can surely guess, the wet end houses the impeller which pushes water through
`your spa circulation system. The dry end contains the motor in a sealed housing that
`your spa circulation system. The dry end contains the motor in a sealed housing that
`protects it from moisture. Each end contains parts that can malfunction and cause pump
`protects it from moisture. Each end contains parts that can malfunction and cause pump
`problems.
`problems.
`
`For example, if your impeller gets stuck due to residue, you’ll see flow problems. If there
`For example, if your impeller gets stuck due to residue, you’ll see flow problems. If there
`is a short in the motor wiring, it could cause your breaker to trip, seemingly at random.
`is a short in the motor wiring, it could cause your breaker to trip, seemingly at random.
`When one component has a problem, it’s possible to repair each end separately. But
`When one component has a problem, it’s possible to repair each end separately. But
`most of the time, it’s less expensive to just replace the broken pump entirely.
`most of the time, it’s less expensive to just replace the broken pump entirely.
`
`

`

`Voltage
`Voltage
`The motor in your spa pump needs power to function. It’s important to determine whether
`The motor in your spa pump needs power to function. It’s important to determine whether
`yours requires 110–120 volts or 220–240 volts. If your pump has only two wires powering
`yours requires 110–120 volts or 220–240 volts. If your pump has only two wires powering
`it, it’s 110–120 volts. The two wires are typically green and white.
`it, it’s 110–120 volts. The two wires are typically green and white.
`
`If it has four wires, then it’s 220–240 volts. The wires would be green, white, black, and
`If it has four wires, then it’s 220–240 volts. The wires would be green, white, black, and
`red. If your pump has a label on the side, the voltage should also be listed there.
`red. If your pump has a label on the side, the voltage should also be listed there.
`
`Tip:Tip: When replacing your hot tub pump, save the power cord from your old pump (if it’s
` When replacing your hot tub pump, save the power cord from your old pump (if it’s
`operational) to use on the new one. Even if your new pump comes with a power cord, it’s
`operational) to use on the new one. Even if your new pump comes with a power cord, it’s
`always good to have a spare.
`always good to have a spare.
`
`Horsepower
`Horsepower
`Just like the imaginary horses in your car engine, the horsepower (HP) in your hot tub
`Just like the imaginary horses in your car engine, the horsepower (HP) in your hot tub
`pump refers to how much power it provides. Spa pumps vary widely from ¾ HP all the
`pump refers to how much power it provides. Spa pumps vary widely from ¾ HP all the
`way up to 5 HP.
`way up to 5 HP.
`
`However, you can’t just pop a 5 HP pump into any spa and expect stellar jet action. That
`However, you can’t just pop a 5 HP pump into any spa and expect stellar jet action. That
`power must be accommodated by appropriate plumbing. Too much power through too-
`power must be accommodated by appropriate plumbing. Too much power through too-
`small pipes will limit power and could even cause leaks.
`small pipes will limit power and could even cause leaks.
`
`
`You’ll also find that the HP rating on pumps can be a bit bloated, especially if yours is
`
`You’ll also find that the HP rating on pumps can be a bit bloated, especially if yours is
`, which means it has a special (read: inflated) rating. This process ofmarked with marked with SPLSPL, which means it has a special (read: inflated) rating. This process of
`
`
`
`noting the HP a pump can achieve in the factory—but not in your spa—is called noting the HP a pump can achieve in the factory—but not in your spa—is called up-up-
`
`ratingrating..
`
`Discharge
`Discharge
`, and it willThe location on your pump where water exits is the The location on your pump where water exits is the discharge orientationdischarge orientation, and it will
`
`
`
`
`either be in the center (on top) or on the side. Most pumps let you turn discharge to
`
`either be in the center (on top) or on the side. Most pumps let you turn discharge to
`
`

`

`orient it however your spa requires. You’ll be able to tell which one your pump is just by
`orient it however your spa requires. You’ll be able to tell which one your pump is just by
`looking at it.
`looking at it.
`
`Tip:Tip:Some pump brands use non-universal fittings for the discharge. If this is the case
`Some pump brands use non-universal fittings for the discharge. If this is the case
`with your new pump, you’ll need to replace the unions when you install the pump.
`with your new pump, you’ll need to replace the unions when you install the pump.
`
`HydroMaster Two-Speed Side Discharge Hot
`HydroMaster Two-Speed Side Discharge Hot
`Tub Pump - 56-Frame - 4 HP - 240V
`Tub Pump - 56-Frame - 4 HP - 240V
`
`Buy Now
`Buy Now
`
`
`
`If you click this link and make a purchase, we earn a commission at no additional cost to you.If you click this link and make a purchase, we earn a commission at no additional cost to you.
`
`Frame Size
`Frame Size
`The housing around your pump includes pre-drilled holes where it will be bolted into
`The housing around your pump includes pre-drilled holes where it will be bolted into
`place inside your spa. The holes are farther apart or closer together depending on the
`place inside your spa. The holes are farther apart or closer together depending on the
`size of the frame, so if you choose the wrong size frame, you won’t be able to attach it
`size of the frame, so if you choose the wrong size frame, you won’t be able to attach it
`properly.
`properly.
`
`

`

`Hot tub pump frames are either 48 or 56. You should be able to find one of those
`Hot tub pump frames are either 48 or 56. You should be able to find one of those
`numbers on your pump’s sticker. If not, you can simply measure between the bolts on the
`numbers on your pump’s sticker. If not, you can simply measure between the bolts on the
`
`frame, or on the motor. If the bolts are closer than 4 inches, it’s a 48 frame. If the
`
`frame, or on the motor. If the bolts are closer than 4 inches, it’s a 48 frame. If the
`
`distance is more than 4 inches, it’s a 56 frame..
`distance is more than 4 inches, it’s a 56 frame
`
`Waterway Plastics 3722021-1D Executive Spa
`Waterway Plastics 3722021-1D Executive Spa
`Pump - 56 Frame - 5 HP - 230V
`Pump - 56 Frame - 5 HP - 230V
`
`Buy Now
`Buy Now
`
`
`
`If you click this link and make a purchase, we earn a commission at no additional cost to you.If you click this link and make a purchase, we earn a commission at no additional cost to you.
`
`How to Prime Your Hot Tub Pump
`How to Prime Your Hot Tub Pump
`When you add water to an empty spa, air can get stuck in your circulation system.
`When you add water to an empty spa, air can get stuck in your circulation system.
`Priming your pump pushes that air out so water can circulate correctly. You’ll need to
`Priming your pump pushes that air out so water can circulate correctly. You’ll need to
`prime your pump before using it the first time, after refills, and as needed in between.
`prime your pump before using it the first time, after refills, and as needed in between.
`
`Even self-priming pumps may sometimes need a helping hand. As the priming process
`Even self-priming pumps may sometimes need a helping hand. As the priming process
`differs slightly from model to model, you’ll want to check your manual for specifics. The
`differs slightly from model to model, you’ll want to check your manual for specifics. The
`two basic methods are easy to do.
`two basic methods are easy to do.
`
`

`

`Control Panel Priming
`Control Panel Priming
`With the push of a button (or a few pushes of a few buttons, really), you can get your
`With the push of a button (or a few pushes of a few buttons, really), you can get your
`pump ready to rock.
`pump ready to rock.
`
`1. Find priming mode on your control panel (if it’s available).Find priming mode on your control panel (if it’s available).
`
`2. Turn your jets on low for 10–20 seconds.Turn your jets on low for 10–20 seconds.
`
`3. Switch your jets to high for another 10–20 seconds.Switch your jets to high for another 10–20 seconds.
`
`4. Repeat until the water pressure is normal and jets are working without any gurglingRepeat until the water pressure is normal and jets are working without any gurgling
`
`or air bubbles.
`or air bubbles.
`
`Manual Priming
`Manual Priming
`If the first method didn’t work, you can use your pump’s bleeder valve to get rid of air.
`If the first method didn’t work, you can use your pump’s bleeder valve to get rid of air.
`
`1. Flip your circuit breaker to avoid accidental contact with electricity from your pump.Flip your circuit breaker to avoid accidental contact with electricity from your pump.
`
`2. Access your hot tub pump and close the gate valve on the discharge side.Access your hot tub pump and close the gate valve on the discharge side.
`
`3. Slowly turn the bleeder valve until you hear air hissing out.Slowly turn the bleeder valve until you hear air hissing out.
`
`4. Once the sound stops, tighten the valve back up. If you don’t tighten it, water canOnce the sound stops, tighten the valve back up. If you don’t tighten it, water can
`
`leak here and cause problems, so be sure to replace it properly.
`leak here and cause problems, so be sure to replace it properly.
`5. Turn your breaker and spa back on to check the jets.Turn your breaker and spa back on to check the jets.
`
`
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`Tired of trying to keep your hot tub clean all the
`time and dealing with chemicals?
`time and dealing with chemicals?
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`course. This is the ultimate maintenance guide that hot tub manufacturer
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`

`

`
`
`

`

`More Priming Tips
`More Priming Tips
`If you’re still having problems after priming your pump, you can try a few other tactics:
`If you’re still having problems after priming your pump, you can try a few other tactics:
`
`
`Give your filter a good cleaning and check for other water flow issues such as
`
`Give your filter a good cleaning and check for other water flow issues such as
`clogs or possibly even leaks.
`clogs or possibly even leaks.
`Double check your water level to make sure the tub is filled properly. If the water
`Double check your water level to make sure the tub is filled properly. If the water
`level is too low, you may have problems with water flow.
`level is too low, you may have problems with water flow.
`Don’t give up after one priming try. Sometimes it takes multiple tries through each of
`Don’t give up after one priming try. Sometimes it takes multiple tries through each of
`the priming steps to properly prime the pump.
`the priming steps to properly prime the pump.
`Never run your pump for more than 2 minutes if you aren’t sure that it’s filled with
`
`
`Never run your pump for more than 2 minutes if you aren’t sure that it’s filled with
`water. This could damage the pump.
`water. This could damage the pump.
`
`Clorox Pool and Spa Filter Cleaner - 1 qt.
`Clorox Pool and Spa Filter Cleaner - 1 qt.
`
`B
`B
`
`N
`N
`
`

`

`Buy Now
`Buy Now
`
`
`
`If you click this link and make a purchase, we earn a commission at no additional cost to you.If you click this link and make a purchase, we earn a commission at no additional cost to you.
`
`Troubleshooting Your Hot Tub Pump
`Troubleshooting Your Hot Tub Pump
`When something is clearly going awry with your pump, you can try a few simple things to
`When something is clearly going awry with your pump, you can try a few simple things to
`narrow down—or even fix—the problem on your own.
`narrow down—or even fix—the problem on your own.
`
`Pump Won’t Prime
`Pump Won’t Prime
`If you hear gurgling, bubbling noises, it may indicate trapped air trying to escape your
`If you hear gurgling, bubbling noises, it may indicate trapped air trying to escape your
`jets. This most commonly occurs right after refilling your spa. If you don’t hear those
`jets. This most commonly occurs right after refilling your spa. If you don’t hear those
`noises, the more likely cause is debris in your filtration system, leaving your hot tub
`noises, the more likely cause is debris in your filtration system, leaving your hot tub
`gasping for air.
`gasping for air.
`
`Clean your leaf trap and filter first, then try priming the pump. If the problem persists, you
`Clean your leaf trap and filter first, then try priming the pump. If the problem persists, you
`can “burp” the rest of the air out of your spa by turning the jets on and off.
`can “burp” the rest of the air out of your spa by turning the jets on and off.
`
`

`

`1. Turn down the heat so it won’t keep trying to run.Turn down the heat so it won’t keep trying to run.
`
`2. Open all the jets fully.Open all the jets fully.
`
`3. Run the jets on high for about 15 seconds.Run the jets on high for about 15 seconds.
`
`4. Repeat the jet bursts three times, increasing the run time by 10–15 seconds eachRepeat the jet bursts three times, increasing the run time by 10–15 seconds each
`
`time.
`time.
`5. When air bubbles out of the jets, leave them on until the bubbling stops.When air bubbles out of the jets, leave them on until the bubbling stops.
`
`
`No Water Pressure
`No Water Pressure
`Water not moving properly? Trapped air, lack of pressure, or a pump that won’t prime
`Water not moving properly? Trapped air, lack of pressure, or a pump that won’t prime
`may be the culprit. All of those problems can sometimes be solved by simply making
`may be the culprit. All of those problems can sometimes be solved by simply making
`sure nothing is physically impeding your circulation system.
`sure nothing is physically impeding your circulation system.
`
`First, clean your filter and leaf traps. If you’ve noticed seriously poor pressure, fully
`First, clean your filter and leaf traps. If you’ve noticed seriously poor pressure, fully
`drain and clean your hot tub. Be sure to start with a line flush product to purge
`drain and clean your hot tub
`. Be sure to start with a line flush product to purge
`your circulation system of any gunk. Also, make sure all the jets are fully open before you
`your circulation system of any gunk. Also, make sure all the jets are fully open before you
`begin the cleaning process.
`begin the cleaning process.
`
`
`Fresh water, a deep clean, and dedication to water maintenance and hot tub cover
`
`Fresh water, a deep clean, and dedication to water maintenance and hot tub cover
`use can go a long way toward preventing spa problems and solving water pressure
`use can go a long way toward preventing spa problems and solving water pressure
`issues. But if you haven’t found any physical reason for your water pressure to struggle,
`issues. But if you haven’t found any physical reason for your water pressure to struggle,
`your pump might need further inspection.
`your pump might need further inspection.
`
`

`

`Motor Turns On and Off
`Motor Turns On and Off
`A common symptom of a motor in its death throes is random power loss. If the
`A common symptom of a motor in its death throes is random power loss. If the
`temperamental motor doesn’t start behaving with a simple breaker reset, it could be
`temperamental motor doesn’t start behaving with a simple breaker reset, it could be
`faulty wiring or the motor itself.
`faulty wiring or the motor itself.
`
`
`If you’re comfortable doing so, you can use a multimeter to check whether the wiring
`
`If you’re comfortable doing so, you can use a multimeter to check whether the wiring
`is actually delivering steady power to the motor. If it’s not, you’ll need to clean off any
`is actually delivering steady power to the motor. If it’s not, you’ll need to clean off any
`corrosion, or possibly even replace the wiring. If the wiring is corroded, look for leaks.
`corrosion, or possibly even replace the wiring. If the wiring is corroded, look for leaks.
`
`If the problem appears to be internal, you’ll may need to replace the motor entirely. As
`If the problem appears to be internal, you’ll may need to replace the motor entirely. As
`always, if you’re not experienced in handling electrical repairs, have a pro test your motor
`always, if you’re not experienced in handling electrical repairs, have a pro test your motor
`and replace the wiring for you.
`and replace the wiring for you.
`
`Digital Multimeter with Ohm Volt Amp and
`Digital Multimeter with Ohm Volt Amp and
`Diode Voltage
`Diode Voltage
`
`

`

`Diode Voltage
`Diode Voltage
`
`Buy Now
`Buy Now
`
`
`
`If you click this link and make a purchase, we earn a commission at no additional cost to you.If you click this link and make a purchase, we earn a commission at no additional cost to you.
`
`Motor Runs, But Nothing Happens
`Motor Runs, But Nothing Happens
`If you can turn everything on, but your water isn’t circulating, you could have a stuck
`If you can turn everything on, but your water isn’t circulating, you could have a stuck
`impeller or a clog somewhere in your circulation system. Grinding noises are a hallmark
`impeller or a clog somewhere in your circulation system. Grinding noises are a hallmark
`sign your impeller isn’t rotating properly due to residue or electrical issues.
`sign your impeller isn’t rotating properly due to residue or electrical issues.
`
`Clean your filter and leaf traps. Flip your GFCI (ground fault circuit interrupter) to cut off
`Clean your filter and leaf traps. Flip your GFCI (ground fault circuit interrupter) to cut off
`all power to your pump, then check out your impeller. If you find anything gunking it up,
`all power to your pump, then check out your impeller. If you find anything gunking it up,
`clean it off, and try your pump again.
`clean it off, and try your pump again.
`
`replace
`A damaged impeller may also fail to turn properly, which may require you to replace
`A damaged impeller may also fail to turn properly, which may require you to
`the impeller itself. Otherwise, your motor may be irreparable and need to be
`the impeller
` itself. Otherwise, your motor may be irreparable and need to be
`completely replaced.
`completely replaced.
`
`Waterway Executive Hot Tub Pump Impeller -
`Waterway Executive Hot Tub Pump Impeller -
`4HP4HP
`
`

`

`Buy Now
`Buy Now
`
`
`
`If you click this link and make a purchase, we earn a commission at no additional cost to you.If you click this link and make a purchase, we earn a commission at no additional cost to you.
`
`Pump Doesn’t Operate
`Pump Doesn’t Operate
`If you can’t turn your pump on, you can’t enjoy your spa. Is your control panel inoperable,
`If you can’t turn your pump on, you can’t enjoy your spa. Is your control panel inoperable,
`too? You’ve got no power coming to your spa.
`too? You’ve got no power coming to your spa.
`
`Simple. Reset your breaker!
`Simple. Reset your breaker!
`
`1. Locate your breaker box (usually a metal box mounted on a post or the side of yourLocate your breaker box (usually a metal box mounted on a post or the side of your
`
`home, a few feet away from your spa).
`home, a few feet away from your spa).
`
`2. Open it up, and note whether the hot tub breaker has tripped on its own already,
`
`Open it up, and note whether the hot tub breaker has tripped on its own already,
`as this could indicate other problems in your spa or with the breaker itself.
`as this could indicate other problems in your spa or with the breaker itself.
`3. Flip it off, then back on again.Flip it off, then back on again.
`
`4. Try to start up your pump. If you’re lucky, this might be all you need to do.Try to start up your pump. If you’re lucky, this might be all you need to do.
`
`
`If the breaker flips when you start up your pump, disconnect the pump and reset the
`If the breaker flips when you start up your pump, disconnect the pump and reset the
`breaker.
`breaker.
`
` trip without the pump connected, you know the problem is caused by theIf it does If it does notnot trip without the pump connected, you know the problem is caused by the
`
`
`
`pump.
`pump.
`
` trip, your pump is probably fine, but you’ll need to troubleshoot the breaker itselfIf it If it doesdoes trip, your pump is probably fine, but you’ll need to troubleshoot the breaker itself
`
`
`
`or call a pro to take a look at your spa’s electrical components.
`or call a pro to take a look at your spa’s electrical components.
`
`Water Leaks
`Water Leaks
`
`

`

` or nearOf course you want water Of course you want water insideinside your hot tub. But water inside your spa your hot tub. But water inside your spa cabinetcabinet or near
`
`
`
`
`
`your GFCI is far less of a good thing. Leaks may cause your hot tub pump to
`your GFCI is far less of a good thing. Leaks may cause your hot tub pump to
`malfunction. They can also trip the hot tub breaker, fry your motor, and rust or corrode
`malfunction. They can also trip the hot tub breaker, fry your motor, and rust or corrode
`electrical components.
`electrical components.
`
`Leaks can start out slow inside your cabinet and remain unnoticed until they’re a huge
`Leaks can start out slow inside your cabinet and remain unnoticed until they’re a huge
`problem. Make a habit of looking for moisture around pump seals before the problem
`problem. Make a habit of looking for moisture around pump seals before the problem
`grows.
`grows.
`
`Grab a flashlight, open your spa cabinet and take a look around. If you see any moisture,
`Grab a flashlight, open your spa cabinet and take a look around. If you see any moisture,
`locate the source. It could be as simple as a worn out union. You may also find a crack in
`locate the source. It could be as simple as a worn out union. You may also find a crack in
`the spa or your impeller housing. Cracks are more likely if your hot tub has recently
`the spa or your impeller housing. Cracks are more likely if your hot tub has recently
`experienced a freeze.
`experienced a freeze.
`
`You’ll not only want to repair the source of the leak, but check to see whether water has
`You’ll not only want to repair the source of the leak, but check to see whether water has
`clean off
`destroyed any electrical components inside your spa. You may need to clean off
`destroyed any electrical components inside your spa. You may need to
`some corrosion or replace wiring to get your pump working properly again.
`some corrosion
` or replace wiring to get your pump working properly again.
`
`CRC Industries 03130 QD Contact Cleaner
`CRC Industries 03130 QD Contact Cleaner
`
`Buy Now
`Buy Now
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`If you click this link and make a purchase, we earn a commission at no additional cost to you.If you click this link and make a purchase, we earn a commission at no additional cost to you.
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`Pump it Up!
`Pump it Up!
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`If your hot tub pump is beyond repair, a replacement will get your hot, bubbly spa
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`If your hot tub pump is beyond repair, a replacement will get your hot, bubbly spa
`water pumping once again. Not all pumps are created equal. In fact, some won’t even fit
`water pumping once again. Not all pumps are created equal. In fact, some won’t even fit
`where your old pump did. Others have brand-specific connectors.
`where your old pump did. Others have brand-specific connectors.
`
`Make sure you know what to look for to choose the best replacement hot tub pump.
`Make sure you know what to look for to choose the best replacement hot tub pump.
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`HydroMaster Two-Speed Side Discharge Hot
`HydroMaster Two-Speed Side Discharge Hot
`Tub Pump - 56-Frame - 4 HP - 240V
`Tub Pump - 56-Frame - 4 HP - 240V
`
`Buy Now
`Buy Now
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`
`
`If you click this link and make a purchase, we earn a commission at no additional cost to you.If you click this link and make a purchase, we earn a commission at no additional cost to you.
`
`What Size Hot Tub Pump Do I Need?
`What Size Hot Tub Pump Do I Need?
`If you’re wondering how you’ll determine which size spa pump you need just by looking
`If you’re wondering how you’ll determine which size spa pump you need just by looking
`at the old one, don’t sweat it. First, look for the sticker on your old pump to determine the
`at the old one, don’t sweat it. First, look for the sticker on your old pump to determine the
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`specifications. If there isn’t one, you can get the information yourself.
`specifications. If there isn’t one, you can get the information yourself.
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`Frame Size: Measure between the bolts. Remember, fewer than 4 inches is a 48
`Frame Size:
` Measure between the bolts. Remember, fewer than 4 inches is a 48
`frame, and greater than 4 inches is a 56 frame.
`frame, and greater than 4 inches is a 56 frame.
`Speed: Determine how many GPM you need for your jets to function optimally by
`Speed:
` Determine how many GPM you need for your jets to function optimally by
`multiplying the number of jets your spa has by their flow rating. You may also
`multiplying the number of jets your spa has by their flow rating. You may also
`contact your spa manufacturer for these details.
`contact your spa manufacturer for these details.
`If you can adjust jet intensity and circulation you have a variable-speed pump.
`If you can adjust jet intensity and circulation you have a variable-speed pump.
`These pumps will also show two different amperages on the data sticker.
`These pumps will also show two different amperages on the data sticker.
`If you have separate circulation and jet settings (two pumps), your pump is
`If you have separate circulation and jet settings (two pumps), your pump is
`likely single speed.
`likely single speed.
`Voltage: If your pump has two wires in the power supply, it’s 110–120 volts. If it
`Voltage:
` If your pump has two wires in the power supply, it’s 110–120 volts. If it
`has four wires, you need a 220–240 volt pump.
`has four wires, you need a 220–240 volt pump.
`HP:HP: Overdoing it with HP can cause trouble, so stick closely to your original pump’s
` Overdoing it with HP can cause trouble, so stick closely to your original pump’s
`horsepower. The general rule of thumb is not to increase by more than 1 HP over
`horsepower. The general rule of thumb is not to increase by more than 1 HP over
`the original.
`the original.
`Plumbing Size: Measure the diameter of the PVC pipes going to your pump
`Plumbing Size:
` Measure the diameter of the PVC pipes going to your pump
`discharge and intake to determine which size unions you need.
`discharge and intake to determine which size unions you need.
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`Installing Your New Spa Pump
`Installing Your New Spa Pump
`If you make sure you buy the correct replacement pump, and you don’t have any other
`If you make sure you buy the correct replacement pump, and you don’t have any other
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`problems with your spa, installing the replacement pump is fairly simple..
`problems with your spa, installing the replacement pump is fairly simple
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`Important: Be sure to flip the breaker before you begin so you won’t get shocked.
`Important:
` Be sure to flip the breaker before you begin so you won’t get shocked.
`Safety first!
`Safety first!
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`1. Close the valves or drain your spa, so all the water won’t run out when you removeClose the valves or drain your spa, so all the water won’t run out when you remove
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`the pump.
`the pump.
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`2. Be prepared with some towels or a Shop-Vac because a few gallons from the
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`Be prepared with some towels or a Shop-Vac because a few gallons from the
` flow out.pipes pipes willwill flow out.
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`3. Detach the copper grounding wire.Detach the copper grounding wire.
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`4. Loosen the intake and discharge fittings.Loosen the intake and discharge fittings.
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`5. Remove the bolts in the frame.Remove the bolts in the frame.
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`6. Gently move the pump so you can reach the wires and detach them.Gently move the pump so you can reach the wires and detach them.
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`7. Wire the new pump properly.Wire the new pump pro