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Thread: low suction after heater install

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    Join Date
    Mar 2016
    Location
    Webster Texas
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    2

    low suction after heater install

    For years I had a hayward gas heater...everything worked great. It went out, so I just plumbed it out of the loop for about 2 years. I've now installed a Pentair max-e-therm 400 (r2d2) and it seems that my arneson pool cleaner (suction) isn't working as well. Also after cleaning the de filter and recharging it, it used to run under 10 lbs. of pressure, and now it's always higher than it used to be. My question is, has anyone run into a problem like this? Could this heater cause a restriction? I bought it brand new. Thanks in advance! Herb

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    Join Date
    Mar 2016
    Location
    Webster Texas
    Posts
    2

    Re: low suction after heater install

    I think I'll check the bronze impeller of the pump...yup...it's a golden oldie...lol

  3. Back To Top    #3
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
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    37,389

    Re: low suction after heater install

    Welcome to TFP!!!

    It is fairly normal for adding a heater (especially if all flow is going through it) to add head loss and thus increase the pressure reading in the filter. If you had a loss of suction, then the pressure would actually drop in the filter because you are moving less water.

    With the added heater, your flow rates likely did drop a little, but the fact that the pressure rose in the heater indicates that there is not likely anything wrong on the suction side.
    Jason, TFP Moderator
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