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Replacing a Spa Pump

By Dan Jung



A failed hot tub pump can cost the owner 100's if not 1000's of dollars in extra damages. Properly inspecting your pump can reduce the risk of damages. A pump will not last forever and will eventually have to be replaced. Look for signs of wear and tear and be proactive!

I always suggest you look for signs of wear every time you replace or clean you filter system. At this time, have a good look at the spa pump. Do you see any signs of water? Is the pump motor louder than normal? Is the motor running excessively hot? If the answer is yes to any of these then it is time to look at replacing or fixing you spa pump.

If you see signs of water leakage then you need to look closely and determine where it is coming from. Check the o-rings and the couplers to insure they are tight and not leaking. If you see water dripping from the pump shaft, then this usually signals a leaky pump bearing. Replace immediately as this will lead to a larger more serious leak. Also look closely at the pump housing for any micro cracks. Vibration of pump motors will quickly cause a small crack to develop into a big crack.

A spa pump should run quietly with a slight 'hum'. If you hear metallic noises or loud vibrations then this is a sign of some internal problem. The bearings might be loose or seized. If this is the case then you need to get this fixed! If the noise is coming from the pump motor then this is a sign of internal damage and should also be fixed before the motor seizes.

While poor jet performance may be caused by a pump, it is not likely. A spa pump either works or does not work. I would look 1st to a plugged filter or a clogged intake as the first cause of week jets. If that looks good then you should inspect the inside of the pump housing. Look inside at the impeller and insure there are no obvious obstructions.

An efficient pump motor will still be warm to the touch. However, it should not be hot when running on low speed. If you find you are almost burning your hand then there may be a problem. Excessive hear means the pump is running inefficiently and costing you lots of money. It may be time to replace!

A spa pump has a starting capacitor that gives it extra juice when starting. If you pump hums and or the main breaker trips then the capacitor may be shot. However, there are a couple other things to check first. Make sure the impeller is free to move and that nothing is lodged. Also make sure no ice has formed inside the pump housing causing the impeller to stick.

If you decide to replace your hot tub pump, look closely at a few things to get a proper match. Choose the same port size, 1 1/2" or 2". Make sure the power is the same, 120 VAC or 230 VAC. Is your pump a one speed or two speed pump? Finally, match the amp rating of your pump closely to the amps of another pump. Never, never match HP ratings listed on a pump as they are never accurate and often overstated!

Quality pumps come with a premium but are worth the extra investment. Don't get trapped into buying the same pump if it has failed unexpectedly. All pump manufacturer

Comments

  1. GL says:

    Some pumps have a strainer built in with the impeller housing. If it has one then simply loosen the cover and add water as necessary.

    Some systems have a check valve in the line on the suction side of the pump. This might be preventing water from getting to the pump. The pump should have a drain plug and they usually also have a plug near the top. If this is the case remove the top plug and prime the pump.

    The filter might also be keeping an air bubble and keeping water from entering the pump. If this is the case just fill the filter .

    GL ☺ ☺

  2. Wareagle6150 says:

    Is the filter pump supposed to remain on while the spa is in use?
    for jandy pools everytime i press spa the filter pump remains on which i dont remember it ever doing before, and when i try and turn the filter pump off it says “Filter pump will remain on while spa is in use” but when the filter pump is on it flows the water out of the spa into the pool and the spa doesnt heat, whats wrong?

  3. Robert G says:

    Can I manually prime my spa pump?
    I just drained and refilled my spa. After bleeding all the air out of the system and ensuring all the valves were open I turned on the pump. The pump turns (the motor runs) but no water is pumped (other than a single bubble when I first turn the pump on). I think the pump isn’t self-priming. Can I manually prime it? Can I force water into the pump somehow?

  4. William B says:

    call a repair man, to keep it safe,

  5. Jonathan says:

    If YOU HAVE TO PUT A valve on pump,much better to put it on the return or effluent side…also,changing the pump impeller to a lower HP would be best!

  6. galaxy says:

    decreasing spa pump flow?
    Hello,
    My friend gave me a spare pool pump for my spa. It is a 1.5 hp and it seems a bit strong. Unfortunately it is only a 1 speed and I prefer a slower (softer) flow. Can I put a valve in front of the pump to “choke” off the water to slow things down a little?

    Thanks,
    Bob
    OK on a valve on the output. Will this “output restricter” cause a stress on the pump unit or the motor itself?

  7. R P A says:

    No, you will burn up the motor. Motors need to run at speed for cooling. Dimmers can work with smaller “universal” style motors but not the type of motors used in spa pumps.

  8. Solange O says:

    What are the symptoms of spa pump failure?

  9. Subha says:

    There are several signs of hot tub pump failure they are malfunctioning of the motor that prevents from turning, including frozen shaft or bearings, may result in a humming noise. Badly worn bearings may cause a whining noise. Leaks around the pump may often indicate a failure of the pump seals. You could replace these individual components but if it is two years old, then it is better to replace the entire pump.

  10. marty d says:

    can i take a single speed spa pump 115volt, and put a dimmer switch on it to slow down flow for when it’s in h?
    can i put a dimmer switch on a elctric pump motor 115volts to throttle flow?

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