Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 2 of 2

Thread: Solar Heater - Draining

  1. Back To Top    #1

    Join Date
    Nov 2014
    Las Vegas

    Solar Heater - Draining

    Purchased pool and solar heater with home. Solar heater has an older Pentair controller and valve. There is a check valve on the inlet to the solar heater once the diverter valve ports to heater, no other isolation installed. Seems like heater drains when valve ports to pool since water flows into pool and pump shuts off. I'm thinking it must have vacuum valve installed. Is there a need to add manual isolation valves and or manual drains to the system? Weather is Las Vegas wintertime and not frigid Midwest.

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: Solar Heater - Draining

    Welcome to TFP!

    Isolation valves are very handy to disable solar when there is a leak, but aren't involved in winterizing.

    Can you describe where that check valve is a little more carefully? If it is after the diverter and before the pipe goes up to the roof you might need to open up the check valve to drain the solar feed line.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts