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  1. #1

    Default Water heater -heat exchanger

    I am about to replace my leaking 6 gal water heater that, although is equipped to do so, the heat exchanger is not connected to the motor to heat water while underway.
    Engine is raw sea water cooled rather than a closed system. Can I use the raw sea water or is it ill advised? If I can, any recomendation where I can get information such as where best to tap into the engine to pick up engine heated water for the exchanger?

  2. #2
    Join Date
    May 2015
    Location
    Oregon
    Posts
    118

    Default Re: Water heater -heat exchanger

    If you are unconcerned about raw sea water cooling your engine, then it's fine to use for heating water.

    You want to tap into the hottest water. Usually where your thermostat housing exits water from the engine. If you have a water cooled exhaust manifold, where the water exits could be the hotter place.

  3. #3
    Join Date
    Dec 2006
    Location
    Chaumont Bay, N.y., USA
    Posts
    5,827

    Default Re: Water heater -heat exchanger

    Ayuh,.... There should be a 1/2" pipe plug just aft of the t-stat housin', in the intake manifold, to get the hot water from, 'n a capped nipple, or another 1/2" pipe plug in the circulatin' water pump for the return water,....
    Any Grease is Better,... Than No grease at All....

  4. #4
    Join Date
    Dec 2015
    Location
    maplevalley WA
    Posts
    5,049

    Default Re: Water heater -heat exchanger

    You have the potential to heat the tank to engine temp so adding a mixer valve is necessary to prevent scalding with the domestic hot. Be safe!

  5. #5
    Join Date
    Dec 2015
    Location
    maplevalley WA
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    5,049

  6. #6

    Default Re: Water heater -heat exchanger

    great post.. keep sharing ..
    Power Transformers in India | Wire Harness Manufacturer in India | Transformer Manufacturer in India

  7. #7
    Join Date
    Dec 2015
    Location
    maplevalley WA
    Posts
    5,049

    Default Re: Water heater -heat exchanger

    This thread is over two years old.

  8. #8
    Join Date
    Dec 2006
    Location
    Chaumont Bay, N.y., USA
    Posts
    5,827

    Default Re: Water heater -heat exchanger

    pradeepkumar is a spammer,......
    Any Grease is Better,... Than No grease at All....

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