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Thread: Backup valve question

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    Backup valve question

    I have a Pentair Legend II pool cleaner with a Letro backup valve. I noticed that it was getting stuck on the steps and the backup was not cycling. Dis-assembly of the valve revealed that the gear mechanism inside is stripped and no longer functional. The valve casing appears to be in good condition and I can buy a new gear assembly for around $48 online. Or I can get a whole new valve for just $8 more. None of the local pool stores carry parts for the Letro, but during my search for a new gear assembly at the local stores, one of the sales people told me I should just replace the Letro with a Polaris backup valve, as their design was much better. At the time, I thought he was just trying to make a sale, since Polaris was the only brand the store carried. But before I order a newLetro backup valve, I thought I'd ask here and see if anyone had an opinion as to how the two brands compared to one another. As far as cost goes, there doesn't seem to be much difference between the two brands.

    Can I replace my Letro backup valve with a Polaris-made model?
    Is the Polaris more reliable than the Letro?
    If I go with a Polaris, there are several models....which model should I purchase?

    Thanks in advance.
    IG, Peb Tec, 15,000 gal saltwater pool with spillover spa. Pentair Clean and Clear Plus cartridge filter (flow rate 150 gpm). Pentair WhisperFlo 2hp pump + 3/4 hp booster pump. Intelichlor IC40 cell. UltraPure Turbo Shock ozone generator. Pentair 320 in-line feeder for winter chlorination. StaRite Max-E-Therm nat gas heater. Pentair EasyTouch controls

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    susa's Avatar
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    Re: Backup valve question

    does the part look like one of these ?

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    Re: Backup valve question

    Quote Originally Posted by susa
    does the part look like one of these ?
    Yes, the pics you linked are of a fully assembled Letro valve. The inner gear assembly of mine has a stripped gear wheel.
    IG, Peb Tec, 15,000 gal saltwater pool with spillover spa. Pentair Clean and Clear Plus cartridge filter (flow rate 150 gpm). Pentair WhisperFlo 2hp pump + 3/4 hp booster pump. Intelichlor IC40 cell. UltraPure Turbo Shock ozone generator. Pentair 320 in-line feeder for winter chlorination. StaRite Max-E-Therm nat gas heater. Pentair EasyTouch controls

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    Re: Backup valve question

    if you're replacing the whole valve, either one should work fine. The backup valve assys are kind of well known for problems, since their gears spin constantly & wear out. But, 50/60 bucks every few years shouldn't be a major deal.
    APSP CST Certified
    17k inground concrete; 1.5hp 2 speed Tristar pump, 300sq.ft. Cartridge filter, AquaLogic PS-4 w/ Tcell-15, Navigator suction cleaner.

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    Re: Backup valve question

    Quote Originally Posted by Ranger987
    if you're replacing the whole valve, either one should work fine. The backup valve assys are kind of well known for problems, since their gears spin constantly & wear out. But, 50/60 bucks every few years shouldn't be a major deal.
    So as far as performance and service life, you'd say that both brands are comparable?
    IG, Peb Tec, 15,000 gal saltwater pool with spillover spa. Pentair Clean and Clear Plus cartridge filter (flow rate 150 gpm). Pentair WhisperFlo 2hp pump + 3/4 hp booster pump. Intelichlor IC40 cell. UltraPure Turbo Shock ozone generator. Pentair 320 in-line feeder for winter chlorination. StaRite Max-E-Therm nat gas heater. Pentair EasyTouch controls

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    Re: Backup valve question

    I've never done a "side-by-side" comparison, so I can't say which will actually work longer, but it seems to me that they're about equal. Someone else here may have a more detailed analysis. If the original one lasted a couple of years, that's pretty good. Make sure to check the inline screen on the hose that supplies water to the cleaner & if you start seeing significant debris buildup, look for a problem inside your main filter. Debris getting into the gears is one of the primary reasons for failure, as is water chemistry. If you're seeing rust on the stainless pieces of the gear assy., watch your chemistry more carefully.
    APSP CST Certified
    17k inground concrete; 1.5hp 2 speed Tristar pump, 300sq.ft. Cartridge filter, AquaLogic PS-4 w/ Tcell-15, Navigator suction cleaner.

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