Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 8 of 8

Thread: Spa water level drops overnight - where is my check valve?

  1. Back To Top    #1

    Join Date
    Jun 2015
    Location
    Dallas, TX
    Posts
    148

    Spa water level drops overnight - where is my check valve?

    I've got a raised spa attached to my pool that waterfalls down into the pool. Today I noticed that after sitting all day without the pump running, the water level in the spa had dropped much lower than normal - it looked like it dropped to about the water level in the pool (which is lower than the spa's regular resting water level, obviously).

    A little searching on the forum shows that this is usually a bad check valve. However, the other threads seem to indicate that the check valve is usually located on the spa return line somewhere...I can't seem to find on my spa return line. The only thing that looks like what I think is a check valve is on the pump inlet. Any chance anyone can help me it with figuring out where/which check valve I need to try and replace? Is it possibly that one on the main pump inlet?

    Below are pictures of the entire equipment pad and a closeup of what I think is a check valve on the main pump inlet. On the equipment pad, the four large vertical pipes on the left are all suction (spa to left of the Jandy valve, and then skimmer 1, skimmer 2, and main drain to the right of the Jandy valve). The large vertical pipes grouped to the right of the picture all return to the pool - in order they are spa return, backwash line to sewer (has the little faucet valve on it also), blower line, two pool return lines (depending on if I bypass the chlorinator) and finally the spa return line.

    Thanks for any help!

    IMG_1235.jpg

    IMG_1240.jpg
    9,000 gallon IG pool with spa, Pentair FNS Plus 48 DE filter, 2HP Whisperflo pump, 0.75HP Letro booster pump, Polaris 280 cleaner, EasyTouch controller (originally a Compool LX100 that was upgraded via Pentair's upgrade kit), TF-100 kit

  2. Back To Top    #2


    TFP Guide

    cowboycasey's Avatar
    Join Date
    Jul 2013
    Location
    Fletcher, OK
    Posts
    3,346

    Re: Spa water level drops overnight - where is my check valve?

    I can't see one in your setup, until now the spa level was above the pool? If so it would seem that you have one but for the life of me cant see it...
    Pool: Intex 16x32 15000 gal, 2 speed 340042, Pentair CC320 Filter, CircuPool SJ45 Salt System, Intermatic PE653RC; Hot Tub: 650 Gal SWG Megachlor
    links: pool school * Recommended-Levels * SLAM * CYA chart * Test kits * How To Post Pictures * Poolmath * OCLT ** Support your website if we helped you :) **

  3. Back To Top    #3

    Join Date
    May 2014
    Location
    Safety Harbor, FL
    Posts
    4

    Re: Spa water level drops overnight - where is my check valve?

    It does look like a check valve on inlet of pump, which wouldn't help with spa level.
    Did you say far right return is also a spa return? Hard to see but that could be a Jandy check valve on it. This seems like where you would want it as there needs to be a valve to stop flow from spa returns to pool returns when pump is off.

  4. Back To Top    #4

    In the Industry

    bdavis466's Avatar
    Join Date
    Aug 2014
    Location
    Riverside, CA
    Posts
    3,304

    Re: Spa water level drops overnight - where is my check valve?

    You have 2 check valves on the return side of the plumbing. Each one is on the opposite far end with the 90 degree turn and the screw looking caps on the ends.

    The one on the far right of the photo is the one that is likely allowing water to flow back into the pool of that's the return valve positioning you had overnight.
    -Brian-
    33K Pool/Spa, Pentair Equipment
    POOL BUILD
    Davis Custom Construction - Home Page

  5. Back To Top    #5

    Join Date
    Jun 2015
    Location
    Dallas, TX
    Posts
    148

    Re: Spa water level drops overnight - where is my check valve?

    Thanks for the responses so far. Yes, the far right line (on the very end) is the return line to the spa.


    Quote Originally Posted by bdavis466 View Post
    You have 2 check valves on the return side of the plumbing. Each one is on the opposite far end with the 90 degree turn and the screw looking caps on the ends.

    The one on the far right of the photo is the one that is likely allowing water to flow back into the pool of that's the return valve positioning you had overnight.
    Those items you're referring to with the screw looking caps are manual valves (may be hard to see them in the pictures but I can get a closeup if needed). I actually replaced the guts (but not he body) last winter on the one on the far right line that is the spa return. Stupid question, but do regular manual Jandy valves also function as check valves? If not, is it possible that the whole system is backing up through the check valve on the pump inlet?

    Thanks again for the help.
    9,000 gallon IG pool with spa, Pentair FNS Plus 48 DE filter, 2HP Whisperflo pump, 0.75HP Letro booster pump, Polaris 280 cleaner, EasyTouch controller (originally a Compool LX100 that was upgraded via Pentair's upgrade kit), TF-100 kit

  6. Back To Top    #6
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: Spa water level drops overnight - where is my check valve?

    That is an Ortega check valve to the left of the right actuated valve.

    And oddly one right in front of the pump, is your equipment well above the pool level?

    No regular Jandy valves are not also check valves. Although they may check valves that are more efficient than the one by your pump.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  7. Back To Top    #7

    In the Industry

    bdavis466's Avatar
    Join Date
    Aug 2014
    Location
    Riverside, CA
    Posts
    3,304

    Re: Spa water level drops overnight - where is my check valve?

    Jandy style valves when fully closed replace a check valve in all scenarios. Your Otega valves absolutely are check valves and more than likely are the issue. The three way valves rarely if ever leak (if so are easily repaired) and are very reliable. I'm nearly certain the far right Ortega is the issue.
    -Brian-
    33K Pool/Spa, Pentair Equipment
    POOL BUILD
    Davis Custom Construction - Home Page

  8. Back To Top    #8

    Join Date
    Jun 2015
    Location
    Dallas, TX
    Posts
    148

    Re: Spa water level drops overnight - where is my check valve?

    Ah ok, thanks. So the two cap-looking things in the red circles (see picture below) are Ortega check valves? As a sidenote, the one on the fair right has occasionally been making a large clicking noise intermittently since we bought the house last summer.

    Pool valves.jpg

    Also, the issue of the spa water level happening only happened for two nights - since then it's been fine. I guess that would mean that the Ortega valve needs to be replaced sometime soon?

    Thanks again for the help.

    Oh and also - yes, the pool equipment is comfortably above the pool and spa water level.
    Last edited by lvrpl; 04-26-2016 at 10:32 AM. Reason: Pool water level detail
    9,000 gallon IG pool with spa, Pentair FNS Plus 48 DE filter, 2HP Whisperflo pump, 0.75HP Letro booster pump, Polaris 280 cleaner, EasyTouch controller (originally a Compool LX100 that was upgraded via Pentair's upgrade kit), TF-100 kit

Posting Permissions

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