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Thread: Heater Question??

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    Heater Question??

    Have a natural gas Rheem heater all picked out .. Is it ok to run the return water through the heater when the heater is off??.. Or should the water be bypassed with pvc.??
    15ft Round, Above Ground , Rheem 106K Heater , Black Diamond 90 Cartridge Filter, Pool Frog(disconnected) ,TF-100, City of Chicagos finest H20

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    Mod Squad jblizzle's Avatar
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    Re: Heater Question??

    Many people like to put in a bypass so that not all the water runs through the heater ... although most heaters have an internal bypass as well. I do not think you would want to completely stop the flow through the heater for long periods of time.
    Jason, TFP Moderator
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    elwood58's Avatar
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    Re: Heater Question??

    Water can run through the heater all the time, but you should also have a bypass to take the Heater out of the loop for maintenance etc. Some people like to bypass the heater when not in use to save internal wear and tear on the heat exchanger. The heater has a flow sensor, so it will not fire up without sufficient flow.
    19204 Gallon L Shape with a 10X10 2nd Step Baja Ledge. Intellichlor IC-40, IntellipH, Cartridge Filter, Pentair Heater/Chiller (Heat Pump). Tons of Deck with Deck Jets. Construction Complete 6/5/17.

    "If you don't measure it, you can't manage it!"

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    Charlie_R's Avatar
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    Re: Heater Question??

    You can do it either way, most pools don't have a bypass on them.
    15'x48" 4500 gallon Intex pool, buried 1.5 ft. Pac-Fab Dynamo 3/4 hp pump. Hayward S180T sand filter, bought used. Taylor K-2006 test kit. Rocket mass heater based wood fired pool heater.

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    Re: Heater Question??

    Thank you
    15ft Round, Above Ground , Rheem 106K Heater , Black Diamond 90 Cartridge Filter, Pool Frog(disconnected) ,TF-100, City of Chicagos finest H20

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    Patrick_B's Avatar
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    Re: Heater Question??

    It's completely optional, but I like options. So, I had PB puit it in that way. I second blizzle on the no flow condition. Not good.
    TFP Moderator
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    28K Gal IG FreeForm, CLI Quartz, Pentair 36"SF & VS Pump, Dolphin M5, Rheem

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    In the Industry

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    Re: Heater Question??

    If you put in a bypass and isolation valves you should have at the very least a pressure relief valve installed into the heater. The heater can fire on on the closed valves then potentially explode if there is no where for the pressure to go.
    20X40 30,000 gallon gunite pool

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