Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 14 of 14

Thread: Im not sure how this is possible?

  1. Back To Top    #1

    Join Date
    Jun 2013
    Location
    Southwest Arizona (Yuma)
    Posts
    125

    Im not sure how this is possible?

    Well here we go again Spa is backflowing into the pool. I had this same problem about a month ago so I replaced the check valve and that was the problem.
    So now its happening again? I wouldn't think the brand new check valve would go bad that fast so I'm trying to find out if I have another problem?
    As you can see from the picture there is a Jandy valve on the return and I have shut the valve off to the spa but it is still backflowing? How in the heck is this possible? Could it have something to do with the In floor Cleaning system?

    I can't figure it out
    Attached Images Attached Images
    My pool:
    Built 2004, 14K gal, IG plaster,Pentair WhisperFlo 2 HP pump(1 speed), Pentair FNS Plus DE filter,
    In Floor cleaning system, Attached Spa with Spillover seperate WhisperFlo pump for jets.

  2. Back To Top    #2

    Join Date
    Jun 2013
    Location
    Southwest Arizona (Yuma)
    Posts
    125

    Re: Im not sure how this is possible?

    I forgot to add that I have taken the check valve out and checked for debris as well and there was nothing.
    My pool:
    Built 2004, 14K gal, IG plaster,Pentair WhisperFlo 2 HP pump(1 speed), Pentair FNS Plus DE filter,
    In Floor cleaning system, Attached Spa with Spillover seperate WhisperFlo pump for jets.

  3. Back To Top    #3
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,338

    Re: Im not sure how this is possible?

    Back off and take a picture of the entire equipment pad. I don't see anything in that picture other than the check valve that would allow the spa to return to the pool.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

  4. Back To Top    #4

    Re: Im not sure how this is possible?

    It might be back flowing from the suction side.

  5. Back To Top    #5

    Join Date
    Jun 2013
    Location
    Southwest Arizona (Yuma)
    Posts
    125

    Re: Im not sure how this is possible?

    Quote Originally Posted by Bama Rambler
    Back off and take a picture of the entire equipment pad. I don't see anything in that picture other than the check valve that would allow the spa to return to the pool.
    Not a great picture but better.

    How could it be backflowing from the suction side?

    This started happening again after the pool guy came on Friday. I think he backflushed the pool but I'm not sure? We are cancelling the service tomorrow and I am going to take care of he pool myself, not just because of this issue but several issues in the past.
    Attached Images Attached Images
    My pool:
    Built 2004, 14K gal, IG plaster,Pentair WhisperFlo 2 HP pump(1 speed), Pentair FNS Plus DE filter,
    In Floor cleaning system, Attached Spa with Spillover seperate WhisperFlo pump for jets.

  6. Back To Top    #6
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,338

    Re: Im not sure how this is possible?

    You made sure that the check valve was positioned over the port properly didn't you?
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

  7. Back To Top    #7

    Join Date
    Jun 2013
    Location
    Southwest Arizona (Yuma)
    Posts
    125

    Re: Im not sure how this is possible?

    Quote Originally Posted by Bama Rambler
    You made sure that the check valve was positioned over the port properly didn't you?
    Yes I did, and it looks as though the valve in functioning properly?
    My pool:
    Built 2004, 14K gal, IG plaster,Pentair WhisperFlo 2 HP pump(1 speed), Pentair FNS Plus DE filter,
    In Floor cleaning system, Attached Spa with Spillover seperate WhisperFlo pump for jets.

  8. Back To Top    #8

    Re: Im not sure how this is possible?

    If the three-way valve on the suction port does not fully close off the spa, then water could flow from the spa to the pool suction (skimmers and main drain) while the pump is off.

    How fast does the backflow happen?

    Does it happen with the pump on, or off, or both?

    There is a 3/4" line labeled "Aerator". What does that go to?

    Does the backflow stop at a particular level in the spa?

  9. Back To Top    #9

    Join Date
    Jun 2013
    Location
    Southwest Arizona (Yuma)
    Posts
    125

    Re: Im not sure how this is possible?

    [quote="JamesW"]If the three-way valve on the suction port does not fully close off the spa, then water could flow from the spa to the pool suction (skimmers and main drain) while the pump is off.

    How fast does the backflow happen? Within about 30 minutes after the pump shuts off.

    Does it happen with the pump on, or off, or both? with the pump off

    There is a 3/4" line labeled "Aerator". What does that go to? Its that fountain thingy that you can turn on to flow water from the side of the deck.

    Does the backflow stop at a particular level in the spa? Yes, it stops at the same level it did when I had a bad check valve when it equalizes with the pool.[/color]
    My pool:
    Built 2004, 14K gal, IG plaster,Pentair WhisperFlo 2 HP pump(1 speed), Pentair FNS Plus DE filter,
    In Floor cleaning system, Attached Spa with Spillover seperate WhisperFlo pump for jets.

  10. Back To Top    #10

    Re: Im not sure how this is possible?

    I don't see any obvious reason for the backflow. I'm not sure what else to check.

  11. Back To Top    #11

    Join Date
    Jun 2013
    Location
    Southwest Arizona (Yuma)
    Posts
    125

    Re: Im not sure how this is possible?

    Quote Originally Posted by JamesW
    I don't see any obvious reason for the backflow. I'm not sure what else to check.
    I put a new check valve in last night. I'm working today so I will see what the water level in the spa looks like when I get home.
    My pool:
    Built 2004, 14K gal, IG plaster,Pentair WhisperFlo 2 HP pump(1 speed), Pentair FNS Plus DE filter,
    In Floor cleaning system, Attached Spa with Spillover seperate WhisperFlo pump for jets.

  12. Back To Top    #12

    Join Date
    Jun 2013
    Location
    Southwest Arizona (Yuma)
    Posts
    125

    Re: Im not sure how this is possible?

    Ok well the check valve I replaced wasn't the problem. So I changed this other check valve seen in the picture and I worked! I have no idea what the purpose of this one is but as long as it works that's all I care about
    Attached Images Attached Images
    My pool:
    Built 2004, 14K gal, IG plaster,Pentair WhisperFlo 2 HP pump(1 speed), Pentair FNS Plus DE filter,
    In Floor cleaning system, Attached Spa with Spillover seperate WhisperFlo pump for jets.

  13. Back To Top    #13

    Re: Im not sure how this is possible?

    Thanks for the update. Good job on getting this fixed.

  14. Back To Top    #14

    Join Date
    Jun 2013
    Location
    Southwest Arizona (Yuma)
    Posts
    125

    Re: Im not sure how this is possible?

    Quote Originally Posted by JamesW
    Thanks for the update. Good job on getting this fixed.
    Oh thanks! It's become my hobby lol!!
    My pool:
    Built 2004, 14K gal, IG plaster,Pentair WhisperFlo 2 HP pump(1 speed), Pentair FNS Plus DE filter,
    In Floor cleaning system, Attached Spa with Spillover seperate WhisperFlo pump for jets.

Posting Permissions

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