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Thread: Are my pumps plumbed correctly?

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    Join Date
    Aug 2011
    Location
    Virginia Beach
    Posts
    293

    Are my pumps plumbed correctly?

    Mostly, is my circulation pump flowing in the right direction? Our previous tub didn't have a separate pump, just the big one.


    The current tub is a Leisure Bay with balboa controls (I believe). I picked it up to replace our previous one (Gerico) that more or less fell apart. The main pump motor looked as if it had been on the Titanic. The circulation pump worked, but leaked like a sieve. I installed the motor/pump assembly from the old tub and put in a new circulation pump. It heats up normally, but after being used it shows "Oh" on the display & shuts down. Tonight I noticed there is a jet near the bottom that when the main pump is running, returns water to the soaking area. When the main pump is off, the circulation pump is drawing water IN through this orifice. As I'm sitting here typing, I'm thinking that when the bathers get out & turn off the main pump, the heater comes back on (wired for 110- heater cuts off when main motor runs). However, if it's running backward, the water isn't flowing properly and a thermostat is shutting it down, sensing water that's hot where it's not supposed to be that warm. *light bulb moment* this would also explain why I've had trouble with the pressure switch! If it is supposed to be on the pressure side, but it's on the suction side, that would explain it! EUREKA! Problem solved, unless you see a flaw in my logic.

    I think I've got it now, but if anyone has anything to add/subtract or advise please do!
    Intex Ultra Frame 18' X 48" 7600 +/- gallons
    Columbia 50 LB sand filter/ HP pump, $$ WELL spent(2nd best thing bought for the pool)
    Virginia Beach, VA
    TF100 test kit- Money WELL spent (best thing I've ever bought for the pool)
    Leisure bay hot tub

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
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    37,879

    Re: Are my pumps plumbed correctly?

    That sounds plausible.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  3. Back To Top    #3

    Join Date
    Aug 2011
    Location
    Virginia Beach
    Posts
    293

    Re: Are my pumps plumbed correctly?

    Update:
    I re-plumbed the circulation pump and it seemed to be flowing correctly. The temperature readout would then go up & down, and eventually settle down on the water temp, but the heater wouldn't kick in. Me in my infinite wisdom started poking at the board with a meter, measuring various voltages to see what component had an input but no output. I was checking what I think might be a thermistor when everything shut down. No fuses are blown, still has power, and turning off the breaker for a few minutes didn't help. I'm GOING to get this thing working, even if I have to plumb in the old mechanical thermostats from the old hot tub. I've had it working just enough to be a tease.

    /off vent
    Intex Ultra Frame 18' X 48" 7600 +/- gallons
    Columbia 50 LB sand filter/ HP pump, $$ WELL spent(2nd best thing bought for the pool)
    Virginia Beach, VA
    TF100 test kit- Money WELL spent (best thing I've ever bought for the pool)
    Leisure bay hot tub

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