How To Make A Hybrid Heat Exchanger

Feb. 23, 2014


Materials used in a hybrid heat exchanger


Here is the new video on how to make a hybrid heat exchanger using copper and plastic. The heat exchanger similar in design to the first heat exchanger. The difference being that I used copper fittings and pipe to make the outer chamber in the first build.

By using PVC fittings and pipe in the new heat exchanger build I was able to reduce the cost of building by 85%.You still need to use copper as the material for the heat transfer material. Plastic is a great insulator but is a horrible heat conductor.

All copper built heat exchanger

Picture of an all copper heat exchanger


If you plan on having fluids run through the exchanger that are above 160°F, do not bother using plastic. At this point you need to do an ALL copper build.

Materials used for this build

2- 2″PVC Tee

2- 2″Plastic/cast x 1-1/2″ copper MJ coupling

2 feet 2″ PVC pipe

2.5 feet 1-1/2″ type L copper (blue writing)


You will need to purchase PVC purple primer and schedule 40 glue. BOTH are needed to properly glue PVC fittings and pipe.

9 Responses to How To Make A Hybrid Heat Exchanger

  1. Ken R says:

    Thanks for the great info.

    I need to do this for potable water at very low pressure (under 4 PSI). As you mentioned, I need potable MJ couplings, but I’m having trouble finding them. Any source you know of?


  2. Peter says:

    Can these be adapted to a cold water 3/4 pipe?

  3. Chris says:

    Maybe a dumb question, but which pip carries the drain water, copper or plastic. If copper, then what pressure can pvc handle?

  4. Mike Bulpin says:

    Perfect timing. Looking to heat hot tub from outdoor boiler. If i reduce my inside copper to 3/4 should i also reduce the outer PVC?
    I see the gap between the 2 is very small. Is there a reason for that?
    I do know you said it would be in the next video.

  5. Mj Armas says:

    What is the procedure making this het exchanger?

  6. Sammy says:

    Can this one be used as a pasturing machine?

  7. Sammy says:

    Do u first heat the liquid and the pump the system ie plate heat exchanger?

  8. Anonymous says:

    Pode ser usado para resfriar mosto?

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