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hot tub

shawn_3
shawn_3 Member Posts: 20
in THE MAIN WALL
I recently recieved a job a to do some heat and plumbing and the contractor asked me to look at the hot tub it is was cut off in some areas it looks like it was connected to the tankless seperately it then is run over to the pumps and filter etc. it has a zone valve on the line too and a operating control which is connected into the 2 inch pvc line for the pump.never seen this before to me it looks like when you hit the pressure switch for the pump it circulates through there any ideas on how to pipe this do i need a mixing valve any ideas would really help thank you

Comments

  • Al Letellier
    Al Letellier Member Posts: 781
    hot tub piping

    Shawn, I'm not sure of the piping arrangement you're describing, but here's how we've done it. Superstor makes a great little 20 indirect pool heater. Pipe it like an indirect on the boiler side, but install a bypass to help with cold start up. Once the tub is heated, you won't need the bypass. On the pool side, pipe the pump discharge into the tank and out again to the filter. Install a bypass here too and use a ball valve to throttle the flow so only some of the water gets heated at a time, not all of it.
    You can use a small heat exchanger as well to do the job, We have 2 of these little tanks on several jobs. One heats a 20x40 pool from 40 degrees up to 80 in about 3 days with a 100,000 BTU boiler, and it heats a 150 gallon hot tub as well off a separate heat tank. Total fuel consumption is about 300 gallons of oil a season.
    Basic explanation, but SuperStor has a good diagram to follow for this type of installation....works great.

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