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Thread: Trying to find a replacement pump, may have water leak

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    Join Date
    Jun 2011
    Trenton, TX

    Trying to find a replacement pump, may have water leak

    We have a 15' round above ground Trevi pool, 4' deep. At the end of last season, it was losing water so quickly we decided we must have a leak at the bottom after no rain all summer and HUGE cracks under the bottom of the pool. While out of town, the water apparently got just below the skimmer with the pump running. We got back, turned it off, and there it sat until now. No more water leaked out, so we're not sure if the leak closed up when we finally got rain or if it was leaking around the skimmer or eyeball. We added water to the normal level, so far it doesn't appear to be leaking out. BUT - - - our pump hums but won't kick on. We figure it burned up running with no water. We have a 2.5 HP A.O. Smith Century Lasar/Waterway Workhorse, 2 speed, model #BN50 on the pump motor. We can't seem to find the same motor; looks like they don't make the 2.5 HP anymore. The model # now says its a 1.5 HP on every website we check. From reading here, seems like maybe we could use a smaller one, but our cartridge filter that's attached to it is huge, maybe 36" tall. If we went with a smaller pump would we need a smaller filter? We have one of those fountains that attach to the eyeball with a hose, runs fine on low speed, but we do have to use high speed in order for the vacuum to be efficient. So, what's our best pump replacement solution? Pool needs bleach, but we figured we needed the pump running first.
    15' round AG Trevi, 1.5 hp Hayward Matrix Powerflo, 200 SF Waterway cartridge filter

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    In the Industry
    poolsupplysales's Avatar
    Join Date
    Jan 2012
    Tulare, CA

    Re: Trying to find a replacement pump, may have water leak

    You could step down to 3/4 hp with no problem that is whats on most 20000 gal inground pools and it is energy efficent. Down sizing will not effect your filter other than you will have lower back pressure and that will extend the life of your filter. Get chlorine in the pool asap or it will turn green.

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    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    SouthWest Alabama

    Re: Trying to find a replacement pump, may have water leak

    Marketing likes to play with the HP numbers to fool us customers. The BN-50 is a 1½ sfhp (service factor x horse power) motor. If that's what's on it now, you're safe in replacing it with the same model. However if it's humming it may just be the capacitor. Take the back cover off and see if you can turn the pump by hand (with the power off, of course). If you can I'd try replacing the capacitor first.

    I agree with getting some bleach in there and mixing it good manually now.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
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