C.B. Posted July 25, 2020 Report Share Posted July 25, 2020 I have a pool with a regular Hayward Superpump, a spa pump and a Hayward millivolt heater. The spa is one of those ones built into the pool deck and the pump for it has its own switch on the wall. My question is....When I turn on the spa pump and heater and change the direction of water flow, am I supposed to turn OFF the "main pump" and only let the spa pump run? I could swear the former operator told me to always leave the pool pump running even when heating the hot tub but when I tried that tonight there was banging in the pipes and shaking so I had to turn it off. I must have misunderstood or maybe i did it in the wrong order. I would greatly appreciate it if someone could set me straight. Thank you. Quote Link to comment Share on other sites More sharing options...
RDspaguy Posted July 25, 2020 Report Share Posted July 25, 2020 Post a pic of the equipment. Quote Link to comment Share on other sites More sharing options...
C.B. Posted July 30, 2020 Author Report Share Posted July 30, 2020 On 7/24/2020 at 10:51 PM, RDspaguy said: Post a pic of the equipment. I didnt realise anyone had replied until today. Here is the pic. Thanks so much! Quote Link to comment Share on other sites More sharing options...
RDspaguy Posted July 31, 2020 Report Share Posted July 31, 2020 Your system is plumbed such that the spa pump acts as a booster to the main pump. The main pump must be on. Quote Link to comment Share on other sites More sharing options...
C.B. Posted August 4, 2020 Author Report Share Posted August 4, 2020 Thank you very much for your help Quote Link to comment Share on other sites More sharing options...
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