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Thread: Return pressure after heater...

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    Join Date
    Jul 2013
    Chicago IL

    Return pressure after heater...

    This is my first year adding a heater (Rheem 106k) and notice the return pressure (11lbs) is not as strong after heater was installed. Cartrige filter is clean , I do not have the water bypassed when heater is not in use. Could pressure be down because of having to flow through filter and heater then return?
    15ft Round, Above Ground , Rheem 106K Heater , Black Diamond 90 Cartridge Filter, Pool Frog(disconnected) ,TF-100, City of Chicagos finest H20

  2. Back To Top    #2

    In the Industry

    Join Date
    Jun 2015
    Wildomar, California

    Re: Return pressure after heater...

    Yes. A heater plus depending on how you plumb it will add more restriction on the system thereby causing less flow back to the pool.

  3. Back To Top    #3

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Sebring, Florida

    Re: Return pressure after heater...

    I would suspect the gauge. If you add a restriction (heater or anything else) to the pressure side, the psi will go up.....not down.

    If you have a bypass, you can demonstrate that by turning the bypass on and off and observing the pressure. If you get readings opposite that, then somehow your bypass is adding more resistance than your heater is. (very doubtful)
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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