Bypass for Heat Pump install

jcushman

Member
Oct 17, 2017
9
Driftwood, TX
I have read most of the threads concerning this topic, but would like to see if there is a consensus.

I am about to install my new heat pump into existing plumbing, and plan to install a bypass for a "just in case" situation (all the reasons given in previous threads).

I plan to use a Jandy three way valve on the inlet side for the bypass. Is it preferable for a three way on the return side also, or would it be better to use a check valve instead. Any thoughts on pros/cons for the two options (or any other recommendations) would be appreciated.

Thanks
 

ajw22

Gold Supporter
TFP Guide
Jul 21, 2013
20,281
Northern NJ
Using a check valve reduced the complexity with one valve to set properly for bypass or heater. With two valves you have the risk that one valve will not be turned properly and someone gets confused about the proper settings of both valves.

 

jcushman

Member
Oct 17, 2017
9
Driftwood, TX
I just got a jandy 3 way valve to accomplish this. Want to make sure I can orient correctly. It is marked inlet on one the bottom leg of the Tee. I want to use one of the sides for the inlet, and the other side and bottom leg as the outlet and bypass leg. I think I can use the valve in the orientation I want by unscrewing the top and reorienting the handle. Is that correct? It looks like that is how yours is set up on the bypass post you linked to.
 
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