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Spa Pump Replacement Guide

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With regular use, a quality spa pump can last an average of five to ten years. If you’ve had your spa pump longer than five years and start to experience frequent maintenance problems or major breakdowns, we recommend replacing the entire pump instead of troubleshooting its various components. In this guide, we’ll go over some of the common causes for spa pump and motor failure and provide troubleshooting tips. We’ll also cover what you need to know and what steps to take to replace your spa pump.

What is a Spa Pump?

A spa pump is vital piece of equipment for any spa or hot tub. It is responsible for drawing water into the spa’s filtration system where its momentum pushes the water through the filter, heater and spa jets before the water is returned to the spa. A spa pump is comprised of two main components: the motor and the wet end. The impeller is powered by the motor and is located inside the wet end. The impeller propels the water through a discharge port on the pump located on the side or center of the housing, and this is why pumps are referred to as either center discharge or side discharge. Available in one or two speeds and horsepower ranging from 1/8 HP for spas that only need water circulation to 5 HP for spas with a large number of jets, there a variety of pumps to fit any spa size or setup.

Common Symptoms of Spa Pump or Motor Failure:

Although there are many causes for pump failure, the following are the most common:

Loose frames may cause water to escape while being propelled through the pump. Check the frames and o-rings to ensure they are on secure and tight. leaking can also come from a faulty pump seal. It’s highly recommended to change out the pump seal when you replace your pump to ensure a tight, leak-free fit.

Low Water Pressure
If your water pressure is low, there may be obstructions preventing the impeller from turning. Check and remove any debris to prevent further jamming.

Abnormal Noise:Worn bearings can produce a humming sound and ultimately prevent the motor from functioning correctly. Check bearings for corrosion or dirt and replace if worn. It’s also good to check the motor coupling, brackets and other attached parts. Check to make sure all nuts, bolts and screws are tight and secure.

Overheating:Under regular conditions, you can place your hand on a spa pump without getting burned. When heat production increases and the temperature rises, it causes unnecessary energy to be released. overheating can also occur when there is not enough clean air flowing through the motor. If this is the case, there may be an issue with the motor. One preventative measure you can take is to try and place your spa pump in an area free from dirt and leaves.

Inactive MotorIf your motor isn’t working, check to make sure the power switch is on. If it is and it’s still inactive, check for failed relays, burned out wires, or possibly a blown fuse. Be sure to also check all connections including the copper bonding wire and the pump power cable for any signs of damage.

How to Choose the Right Spa Pump:

Because of all the different types of spa pumps available, it can be challenging to choose the correct replacement. To make sure you choose the correct spa pump replacement, check the nameplate of your old pump. Located on the side of the motor, the nameplate lists everything from ambient temperature to voltage information. There are five main things to look for when replacing your spa pump:

  1. Frame size: 48 or 56
  2. Speed: single or dual
  3. Voltage: 115V or 230V
  4. HP: 1/8 HP to 5 HP
  5. Pump Plumbing Size: fittings in 1-1/2”, 2”, some 2-1/2”
Correctly measuring the pump’s plumbing size is a very important step in replacing your spa pump. Getting it wrong may result in ordering the wrong pump. The fitting sizes listed above are pipe call-out sizes, not fitting measurements.When you’re ready to measure, remove the pump unions and measure the outside diameter (O.D.) of the intake suction port.

You will notice that the outside diameter is larger than the fitting size. This is the reason using the fitting size as a measurement and not the outside diameter results in ordering the wrong pump size. Having this information handy can help you choose the right replacement for your spa pump and make sure your new pump is compatible with your current spa system.

The following steps are meant to guide you through the spa replacement process. Each spa pump may have different installation procedures and additional connections. Please refer to your product manual to ensure accurate installation.

Spa pump replacement can be done in 6 steps:

Step 1: Turn Power OFF

Be sure to disconnect all power running to your spa and remove the access panel to get to your spa pump and connections.

Step 2: Remove the old spa pump

Shut the valve gates to keep spa water from rushing out when the pump is removed. Carefully locate and unscrew the two union connections. Disconnect the copper bonding wire from the pump and remove the mounting screws from the base bracket. Locate the pump power cable. If it’s still in working condition, remove it from the old pump by loosening the cable clamp screws. If your new spa pump has an included power cable, remove the old one from your spa’s control system.

Step 3: Connect the pump power cable

If you’re using the pump power cable from your old spa pump, it’s important to ensure the wires are clean and pay attention to the wire colors and connections. Be sure to replace the cable in the same manner you removed it from the old pump.

Step 4: Attach the new pump

Place the new pump on its mounting bracket and connect the union parts. Hand-tighten and secure the unions to prevent leaking. Reconnect the copper bonding wire and replace the mounting screws to fasten the pump to its base.

Step 5: Prevent air lock

Step 5 is crucial to preventing air lock and can easily be done before powering on your spa. Air lock happens when air pockets get caught around the impeller and block its function. Open the valves to fill the pump with water, effectively eliminating all air from the pump.

Step 6: Power ON and test

Replace the spa’s access panel and power on your spa to make sure all your equipment is in working condition.

If you experience spa pump failure, remember to pay attention to the symptoms and troubleshoot before considering replacement. Many times, troubleshooting will cost you less than replacing the entire pump. If you plan on replacing your spa pump, take note of your pump’s frame size, speed, voltage, horsepower, and pipe size to make finding a replacement easier. A good spa pump will last you about five to ten years and routine checks will help extend the life of your investment

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  • cvbinc@yahoo.com

    I need some help! I want remove the pump from motor,so that I can change the seal. When I try to unscrew the long skinney bolts to free the pump. It feels like I may twist those bolts into….. Would appreciate any help Thankd Don Watkins

  • cvbinc@yahoo.com

    well as I predicted the long skinney bolts did in fact twist into while trying to remove them. So now I will be needing new bolts,that is if I can get the broken ends out of the pump housing,comment) POOR ENGINEERING DESIGN. Now I am trying to remove the empellor to get to the pump seal. any suggestions Thanks Don………

    • PoolSupplyWorld

      Hi Don, thanks for the comment regarding the removal of your impeller from your pump. The impeller is attached to the pump’s shaft and can be accessed after you remove the diffuser. Once the motor is separated from the pump, the diffuser can simply be removed by hand. To easily remove the impeller, use a hex tool to hold the shaft still while you unscrew the impeller. Once the impeller is removed, you reveal the shaft bushings and the pump seal. We hope this advice has helped. If you’re looking for any replacement bolts, impellers, or pump seals, PoolSupplyWorld carries an array of replacement parts to fit your needs. Please let us know if we can be of further assistance.

  • Pete Martino

    Recently we noticed a black grit that is coming out of the supply line in the pool. I have a sand filter is this an indication that the sand has to be changed. We also have a salt generator I don’t know if that could be the cause. Any input will help. Thank you Pete

    • PoolSupplyWorld

      Hi Pete, it is very possible that the black grit you’re seeing may be coming from your sand filter. If you backwash your filter regularly and still notice black grit, the trouble may be your air relief – or air bleed – tube in your filter. A damaged air relief tube can cause increased pressure and push sand back out into your pool.

      Another possible issue may be broken laterals or a damaged piping assembly near your laterals at the bottom of your unit. In order to check the laterals, open your filter and remove the sand to get a proper view.

      It doesn’t sound like this is the case, but a good indication that the sand in your filter needs to be changed is when it becomes hard and clumped instead of fluffy.

      If the trouble was being caused by your salt generator, you would see white flakes due to calcium build-up, not black grit. If you discover that you need replacement parts for your filter, please give us a call and we’ll be happy to assist you in finding what you need.

  • patty

    i have a Leaisure Spa that I have to replace the main pump again, the pumps are only lasting a year. I read pumps should last 8 to 10 years. What is wrong?

    • PoolSupplyWorld

      Hi Patty, thank you so much for your question. Pumps fail for a variety of reasons. Many times the pump will begin to leak water or air will get in to the pump/motor thus causing it to fail. If you could give us a call we would be more than happy to discuss your old pump and give you ideas for a new one.

  • tyler

    I have a hot tup with a gemeni plus 11 pump 036f00C/ NRUZA-C 1 1/4hp 8.5 amp installed 11/11/00 With a air switch. can/should I use the old air switch/and cord or should i buy all toghether . I think the bearings are going as it shows a little sparking while running and is getting much louder. many different models available use Balboa 059F88C ???

  • alan guskind

    I have a watkins hot tub,it has there wavemaster 7000 1.65 hp in 120v, 48 frame..what pump can i use to replace???

    • PoolSupplyWorld

      Hi Alan, to be certain we recommend the correct replacement pump for your Wavemaster 7000, could you please supply us with the serial number of your hot tub as well as the model number of your pump? Thanks, and have a great day.

  • Jennifer

    I need a 3 HP Pump Motor for my Vita Spa. The Part # 7-193108-01. It says Super-Flo on the side and it is a side discharge motor. It is made by Century AC Motor. Do you have what I need?

    • PoolSupplyWorld

      Hi Jennifer, thank you for your question regarding a replacement pump motor for your Vita Spa. If you could please provide us with the serial number of your spa and verify what the frame size of your motor is, we would be happy to help you track down the proper replacement motor. For immediate assistance, please feel free to contact us, and a customer service representative will be happy to assist you.

  • Tom

    I have a Waterway Insulated Wet End Pump/Executive 56. Model #: PF-40-2N22c. Serial #: PF40913295. Frame size is 56. Voltage is 230v. The wires are burned out and I need to order a replacement. What pump do you recommend?

  • Adam

    My pump had a waterway Executive 56 5 hp dual speed 2 1/2 intake, 2″ discharge – I ordered the same pump but my old pump has a ventilation fan on the end that connected to a tube. I cant seem to find that on any of the pumps… what am i missing?

  • Mike

    I’ve now gone through 2 Waterway Executive 48 Spa pumps in 6 years. I’ve noticed both times there is a white corrosion material that collects on the motor shaft where it enters the wet end. I assume it’s because the water here in Hawaii is a bit hard. Is there anything I can do to correct/prevent this? Any suggestion on how to extend the life of my pump? Thanks, Mike

  • Rob

    Looking to replace a Emerson tt505 r63mwena-4727 I measure 3″ od both in and Out. Is 3721621-1T the correct replacement? Thx

  • Allen

    I have a waterway 2 speed 22Ov pump Modle #PF-502N22C Part number 7-187098-02 What would be the replacement for this?

  • Ed G.

    I have a Waterway Executive 56 that needs replacement parts for the pump end. The motor is tagged as 7.0 BHP which I assume is horsepower? I only see parts for up to 5 HP, am I missing something?

    • PoolSupplyWorld

      Hi Ed, if you could please let us know the parts on your pump that need replacing, and provide us with your pump’s model number — not the part number of the motor, but the part number of the pump itself — we would be happy to help you track down the appropriate replacement parts. Please feel free to contact us for immediate assistance.

  • J

    I recently purchased a replacement Waterway Executive 48-Frame 1HP Dual-Speed Spa Pump – 2″ Intake – 2″ Discharge – 115V – 3420410-1A. Now I find that the pump I am replacing is an Executive 48-Frame 1.5 HP Dual-Speed Spa Pump – 2″ Intake – 2″ Discharge – 115V – 3420610-1A. Can I still use the 1 HP pump instead of a 1.5 HP pump?

    • PoolSupplyWorld

      Hi J, replacing your Waterway Executive 48-Frame 1-1/2HP Dual-Speed Spa Pump (3420610-1A) with a Waterway Executive 48-Frame 1HP Dual-Speed Spa Pump (3420410-1A) should not be a problem as long as the physical size and water flow differences are not an issue for your spa. Both these pumps have 2″ intakes and discharges, but the 1 HP pump has a 9.73″ long motor while the 1-1/2 HP pump has a 10.48″ long motor. Also, the 1 HP pump will provide approximately 10 GPM less water flow than the 1-1/2 HP pump. If you have any further questions, please don’t hesitate to ask.

  • Jerry Gaddy

    I have a model PF-40-2N22C. The seal on the shaft between the motor and wet end started leaking. I have removed the motor and wet end and taken the outside cover off. How do I get the impeller off to replace the seal? Thanks Jerry

    • PoolSupplyWorld

      Hi Jerry, to remove your spa pump’s impeller, you must first remove the diffuser. Once the motor is separated from the pump itself, the diffuser should easily come off by hand. Then, to remove the impeller, use a hex tool to hold the shaft in place and unscrew the impeller. Once the impeller is removed, it will reveal the pump seal. If you have any further questions, please don’t hesitate to ask.

  • Jamie Morgan

    I have a Jacuzzi Select Series spa (1998-2001) that I overfilled with water (was distracted while filling). When I got out there, water was going over the top and I noticed the SPA breaker tripped and would not reset. Disconnecting plugs, I narrowed it down to the primary high speed pump. With it disconnected the spa works fine. The motor is a AO Smith BN40SS 2hp 3450rpm 230/115 volts 10.0/20.0 amps. I have a few questions. What is the replacement motor you sell? I was thinking your Gecko Aqua-Flo Flo-Master XP2e 2 HP 230V Single Speed 56 Frame Side Discharge Pump – Sku #: 05220737-2000? Did the motor fail because the tub overflowed or was it coincidence? Can I use a higher HP motor to increase flow (right now it’s rather dull, but maybe that’s because motor was going bad?). What is dual speed? My SPA has circulating and high speed separate pumps. Is a dual speed pump used in a spa that doesn’t have separate circ/high speed pumps? Thank you, Jamie.

  • Doug

    I have to replace a Dimension on Model DJAYFB-9103D pump with a new one. The original had a small line connected to the top of the “wet end” the new one does not appear to have a spot for this connection. Any ideas??

    • PoolSupplyWorld

      Hi Doug, we’ll be happy to help you find the correct replacement pump for your spa, but first, could you please tell us the make and model number of your Dimension spa? This will help us track down the proper replacement pump.

  • joe cashin

    I have just installed a new waterway executive 56 pump into our hot tub. when first turned on it worked fine. after fifteen minutes it started to pulse or an off an on whine. I lost all pressure in the jets. The pump did nt shut off completly. also it was very hot to the touch, more than warm. i shut it down for 15minutes and then restarted and same thing happened. Any ideas

    • PoolSupplyWorld

      Hi Joe, your new spa pump could be shutting down and getting hot to the touch because it is not priming properly, which means it is running without water flowing through it, or it could be improperly wired. We highly recommend contacting a spa service technician to ensure proper installation and wiring. Please let us know if we can be of further assistance.

  • JB Zieg

    I have a Viking Hot tub, Executive model that 6 years old. The wet end blew out (we had a power outage and the on / off action probably caused it) and I bought a new pump. The old pump only had two contacts plus the ground to reconnect the wires to….the new motor has three poles to connect wires to plus the ground connect. I bought the pump according to part number and I think I got the dual speed motor(which is a little longer than the old one). One wire goes to ground, one wire goes to the top pole ( as you are looking at the pump with the base side on the ground), and there are two wires going to the bottom pole. Where on the new motor do I mount the wires to? Can I just mount as I see it on the old motor and leave the last pole un-attached to anything which I presume would just give me the one speed (low) WHICH IS FINE.

    • PoolSupplyWorld

      Hi JB, You can wire a dual speed motor in as a one speed that’s not a problem. You do want to make sure when replacing the motor that you also replace all the gaskets and seals. Let us know if you have any questions!



  • Jeff

    Where can I find a spa pump seal for a DJAYFB-9103d pump?

  • disqus_xHOygwK2cS

    I have a Vita Spa w/ a century AC Motor by A.O.Smith part # 8-193108-01 type cxpm fr x56Y. 3 HP Would you happen to have a replacement for it?

  • disqus_xHOygwK2cS

    BTW the symtom is buzzing for short period, get a flow error on display and then it stops buzzing. The motor never spins

  • Bruce

    I want to replace a spa pump. Mine is the same info as user disqus-XHOygwK2cS Vita Spa with Magnetek pt# 8-193108-01 3.0 HP, 230 Volt, FRX 56Y, OD of plumbing is 3″, RPM is 3450/1725

  • Kenney Hackworth

    I have a Flowmaster 48 frame 3hp 230v 2 speed pump that is overheating. It is 8 years old, so I plan on replacing the whole unit. I am having a hard time finding a 3 HP pump that meets the specs: center discharge (I have some room and a few inches of give in the plumbing, so could use an offset discharge as well I think) 1.5″ plumbing. Can you recommend a replacement pump please?

    • Dylan (PoolSupplyWorld)

      Your suggested replacement will actually be the Gecko Aqua-Flo Flo-Master CP 02620000-1010, at this link:


      Your pump currently says 3.0 HP SPL on it, but this is actually not the true horsepower of the pump. All that is, is the braking horsepower at the moment the pump is turned on. The true continuous horsepower of this pump is going to be 2 HP, just like that model I provided for you. The braking power was often labeled on spa pumps as more of a marketing strategy to make spa pumps seem stronger. If we look by the actual motor model, and the amp draw, your pump is truly a 2 horsepower pump. All of the plumbing should be the same on the 02620000-1010 as well. Let me know if you have any further questions!

  • WD

    I replaced the seal, wear ring and impeller on my Waterway Executive 56 spa pump. I turned it on and it literally blew the faceplate off of the wet end. Any ideas what went wrong?

    • Dylan (PoolSupplyWorld)

      First thing that jumps out at me would be that the faceplate was not securely tightened when the wet end was reassembled. Maybe one or two of the bolts was only put in place, or was only barely screwed in.

      Was there a valve after the pump that was still closed? If so this would raise the water pressure and could conceivably cause this issue. When you are taking the pump out there are valves before and after the pump that need to be shut, perhaps you forgot to open them back up.

      Were the wrong replacement parts used? Probably a long shot, but if the wrong seals, wear ring, and impeller were used then maybe this could lead to a leak and the pump coming apart.

      • WD

        There was no valve on the discharge side. I tried the pump and it did not seem to work, I thought there must be an air lock. The second time I tried the pump it blew four of the threaded brass inserts out of their seat and opened a 1/4 ” gap between the volute and faceplate. I always thought that centrifugal pumps were not positive displacement.

  • Ross Linfoot

    I am in the process of replacing the motor in an Dreammaker Eclipse spa. This spa has no heater and the heat is derived from the wet end mechanism (friction to heat the water). Unfortunately I did not realize this and purchased a normal wet end and the device no longer generates the heat required. I was thinking of adding a heating element and controller as I was unable to find a wet end that would be correct for the spa. Does anyone know where I could get the correct wet end – or a suggestion for a new controller,heater and pump ? or suggestions on how I should go about generating the heat with a normal wet end on the motor ?

    • Dylan (PoolSupplyWorld)

      As for finding the same wet end you previously had, would you have any model or part numbers that you could pass along? To replace your current control pack I would want to know a bit more details about your spa, is it just the one pump? What kind of topside controller does it currently have?

      If you have photos of any of this equipment it may help us make a suggestion. Thanks!

  • Timothy Buron

    I have a Morgan Oceanside 725 Spa and I need a pump motor. Model #00M5TRXX8ASD. I believe it is 240v. What do you recommend?

    • http://PoolSupplyWorld.com/ Whitney (PoolSupplyWorld)

      We should be able to find a replacement motor that will work perfectly for you spa. I’m not pulling anything up with that model number you provided. Do you know what type of spa pump that you currently have? If you had the name or model number of the spa pump I could use that to find your correct motor replacement.

  • PoolSupplyWorld

    Hi Mike, there are a couple reasons for a Waterway Executive 48-Frame spa pump to become corroded, the first being that it is leaking water. However, since you have seen the same symptoms on two separate pumps, it is more likely that if you live close to the beach, wind and sand may be the culprit. Wind and sand can have an adverse effect on a pump, and can lead to corrosion, like you are seeing. You can potentially prevent the corrosion and extend the life of your pump by protecting it with some sort of cover, but be sure it has holes for ventilation so the pump can breathe and condensation won’t remain trapped inside.

    If you have any further questions or need help locating a replacement pump, please feel free to contact us for immediate assistance.

  • PoolSupplyWorld

    Hi Jaime, it sounds like there might have been water damage to your existing motor, which can be the result of a leak, and water will most likely have accumulated around your pump to illustrate this. Your pump’s failure may also be the result of an electrical malfunction, particularly if your breaker was tripped. A qualified spa technician will be able to verify the key cause of your pump’s failure more accurately.

    While your replacement motor is the Century A.O. Smith Century Flex-48 48Y Thru-Bolt 2 HP Single Speed Above Ground Pool Motor – 10.0/20.0A 115/230V, it may be best to completely replace your pump, as this is the more economical route to take, and it will ensure complete compatibility. If you’re interested in the Gecko Aqua-Flo Flo-Master XP2e 2 HP 230V Single Speed 56 Frame Side Discharge Pump (05220737-2000), you’ll want to make sure its specs match the specs of your existing pump. The Gecko Aqua-Flo Flo-Master is designed for side-discharge plumbing and includes a 2HP motor that uses 230V for operation. It’s built with 2″ inlets and outlets and a 56 frame for installation. If your specs are similar to this pump’s, a switch should be no problem.

    While you can definitely upgrade your pump to a higher horsepower, it isn’t necessarily better if you do, as often times spas are designed to fit the horsepower they’ve been originally built with. However, if you do decide to upgrade, sticking with a single HP difference is usually your best route: for example, moving from a 2 HP to 2.5 or 3 HP pump is generally recommended. For more information on upgrading to a higher horsepower, we highly recommend giving your spa’s manufacturer a call. Jacuzzi Hot Tubs can be reached at 1-866-234-7727.

    Dual speed pumps are simply pumps that offer the choice of high and low speed settings. This is a great way to save on energy, as most single speed pumps are set for a continuously high speed that often runs up energy bills. With dual speed pumps, the option to change speeds is usually accessed through the topside control of your spa. Most spa packs come pre-equipped with the ability to offer access over dual speeds, but this will depend on the spa pack you currently have, and therefore you’ll want to verify its settings before switching to a dual speed.

    Also, even when switching to a dual speed spa pump, your spa must remain with its two pumps (the main pump and its circ pump), particularly for heating efficiency. If you’re looking for more information on switching your spa pump, please feel free to contact us for immediate assistance.

  • Anonymous

    I have a follow-on question. Last year, I bought an IntelliFlo 011017 VS-SVRS Variable Speed Pump from PoolSupplyWorld for my pool, and love it. Today, I ordered another 011017 from you to replace my spa pump. It’s overkill, but I like that built-in controls and we are super noise-sensitive, so the quiet operation is a big factor. Here’s my question: I am considering using the single IntelliFlo I just bought to replace BOTH my spa pumps. Your note to Jamie in the message above worries me — you said, the spa “must remain with its two pumps.” However, I think I could replumb to use only the IntelliFlo and want to know if you agree. The spa is 30 years old or so. It has two pumps, one for circulating (that runs through the filter and heater) and another for running the jets higher (runs through the heater only). Both are located about 70 feet from the spa using underground piping, and each has its own feed pipe from the bottom of the spa. However, the outlets from the two pumps combine before going into the heater and out to the spa. That single line then splits at the spa to feed the spa through the wall jets and a pipe in the floor. I would direct both lines from the spa, and the skimmer line, into the IntelliFlo, then run everything through the filter and heater. Usually, the IntelliFlo will run on low RPM. When we want the jets to run hard, we would dial up the IntelliFlo to higher RPM. Currently, the circulating pump is a 3/4 HP pump with a 1.65 SF as the main pump, and a booster pump that is 2 HP with a 1.1 SF. The only limiting factor I can see is the backpressure from my canister filter, which I would address if needed by getting a bigger filter. Other than that, do you see a reason this wouldn’t work? Thanks, Jim

  • PoolSupplyWorld

    Hi James, after speaking with Pentair, they’ve explained that the SVRS mechanism on the IntelliFlo VS-SVRS pump would make it poorly suited to replacing both pumps on a spa, largely because it would be difficult to achieve the pressure needed for the jets; switching back and forth between these speeds may cause the IntelliFlo to shut off in safety mode rather than achieve the pressure needed.

    The IntelliFlo VS (011018) would be better suited to such an application, however, we recommend contacting Pentair directly for any further questions on such a replacement. This way, you’ll be able to go over the exact configuration of your piping and spa setup to verify any modifications that you plan on pursuing. They can be reached at (800) 831-7133. Please let us know if we can be of any further assistance.

  • PoolSupplyWorld

    Hi Jeff,

    You can find a replacement pump seal for that pump here. Let me know if you have any questions! -Christian