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Author Topic: Connecting the hot tub on the P&M  (Read 101 times)


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Connecting the hot tub on the P&M
« on: April 27, 2018, 06:32:13 PM »

Looking to connect my hot tub on the boiler, anyone have advices? About 400 Gallons, Not sure which Heat exchanger to use, I see the 88kbtu is recommanded for this size of tub, but am not sure about the connection, they are only 1" on the tub side,, and my whole hot tub is 2". If i want to keep 2", i have to go on a 300kbtu heat exchanger which might be too much.

Also connection wise, i was thinking of connecting a 3 way valve on the heat element, so when the hot tub ask for heat, the 3 way valve open, send the water from the boiler to the heat exchanger and when it reach it's temp, it will be just looping the flow from the boiler, any advice on this?

Thanks guys,

E Yoder

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Re: Connecting the hot tub on the P&M
« Reply #1 on: April 27, 2018, 07:58:00 PM »

I'd use the small heat exchanger, tee the tub piping so a percentage goes through the tube and shell.
I wonder if the power to the element could trip a relay  to run a pump or zone valve.
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