Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 5 of 5

Thread: Solar valve position for off??

  1. Back To Top    #1

    Join Date
    Jun 2009
    Location
    Vero Beach, FL
    Posts
    462

    Solar valve position for off??

    I think I've been keeping my 3 way Jandy valve in the wrong position when I wanted the solar off and now want to check my logic here.

    The 3 way valve can be rotated 360. When I wanted solar off, I would position the valve such that the gate was North and blocked flow to the vertical pipe. However, if I did this while the pump was running, I trapped water in the feed pipe.

    Is it OK instead to turn the valve so that the gate is South (toward the X) and not blocking any flow to any pipe. Then the water takes least resistive path and avoids the solar even though the path is open. This would allow the solar to drain completely.

    Either way, when I want the solar On, I just turn the valve so that the gate is North East allowing some flow both ways.[attachment=0:3mvram2v]solar.gif[/attachment:3mvram2v]
    Attached Images Attached Images
    25' x 13' Roman, 12000 gal IGP, Plaster, with 500 gal Spa
    SWG, 1 HP Max Flo Pump, C-900 cartridge filter
    Solar heat

  2. Back To Top    #2
    Mod Squad JohnT's Avatar
    Join Date
    Apr 2007
    Location
    SW Indiana
    Posts
    8,617

    Re: Solar valve position for off??

    That's going to depend on how much back pressure the rest of your plumbing has. The lift to the solar could be low enough that water will still partly go to the panels when you have the valve to the south.

    Many people drill a hole in the sealing surface of the valve to allow the solar to drain back when it's off. Some valves are made that way.
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

  3. Back To Top    #3

    Join Date
    Jul 2008
    Location
    Solon, Iowa
    Posts
    170

    Re: Solar valve position for off??

    Turning off the solar by blocking it seems to be the preferred way. Both of my 3-way valves (both Jandy - one came with my solar kit, the other with my Goldline solar controller) are made 'leaky' to drain when positioned to close the solar. I'd go that route, but I'm certainly no expert - just based on what I see with my system.

    Kelly
    15X30 AGP, Lomart beaded liner;
    1.5 HP Sta-Rite pump with 21 inch sand filter (Zeobrite media)
    Mineral Springs (Aquatrol) SWCG, Rigid PVC plumbing, 2 inch
    Four 4X12 Techno-Solis solar panels, rack mounted, Goldline Solar Controller

  4. Back To Top    #4

    Join Date
    Jun 2009
    Location
    Vero Beach, FL
    Posts
    462

    Re: Solar valve position for off??

    My valve is actually a Pentair, not a Jandy as I first mentioned. How can I check to see if it is the one with the drain down feature? If it is not, can I modify it? What is the difference?

    If I drill a hole, what is the optimal size?
    25' x 13' Roman, 12000 gal IGP, Plaster, with 500 gal Spa
    SWG, 1 HP Max Flo Pump, C-900 cartridge filter
    Solar heat

  5. Back To Top    #5

    Join Date
    Jul 2008
    Location
    Solon, Iowa
    Posts
    170

    Re: Solar valve position for off??

    bump - for expert advice
    15X30 AGP, Lomart beaded liner;
    1.5 HP Sta-Rite pump with 21 inch sand filter (Zeobrite media)
    Mineral Springs (Aquatrol) SWCG, Rigid PVC plumbing, 2 inch
    Four 4X12 Techno-Solis solar panels, rack mounted, Goldline Solar Controller

Posting Permissions

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