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

Thread: Multiport Pressure Problem

  1. Back To Top    #1

    Join Date
    Sep 2014
    Location
    galena ohio
    Posts
    5

    Multiport Pressure Problem

    I have an above ground pool that I just finished a major overhaul on over the weekend. I replaced the liner, re-did all of the plumbing and changed the filter media and laterals. The filter is a Hayward S200 and I switched it from sand to zeobrite. The pool finally finished filling last night so I followed the directions from zeobrite and backwashed, rinsed, etc. Each time I did so, the filter seemed to operate normally and was around 5-7 PSI. After completing those steps, I turned the multiport setting to filter and it immediately built up a ton of pressure up to 25 PSI. Water was squeezing from the top air relief screw and also gushing from the waste line. Does it sound like the multiport valve could have gone bad over the winter? A couple of other symptoms are even with the valve set to close, water is backfeeding from the return line into the filter. I'm assuming the close setting should shut that off but can anyone confirm? Could a bad spider gasket cause the filter to build pressure like it did? There doesn't really seem to be many more parts inside these valves from what I can tell so I am at a loss as to what to look for.

  2. Back To Top    #2
    Mod Squad JohnT's Avatar
    Join Date
    Apr 2007
    Location
    SW Indiana
    Posts
    9,090

    Re: Multiport Pressure Problem

    I would double check your new plumbing. Doesn't sound like a multiport problem
    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
    Sep 2014
    Location
    galena ohio
    Posts
    5

    Re: Multiport Pressure Problem

    If it's a plumbing issue, is it safe to assume it would have to be in the return line since backwash and rinse are ok?

  4. Back To Top    #4
    Mod Squad JohnT's Avatar
    Join Date
    Apr 2007
    Location
    SW Indiana
    Posts
    9,090

    Re: Multiport Pressure Problem

    Quote Originally Posted by snarl16 View Post
    If it's a plumbing issue, is it safe to assume it would have to be in the return line since backwash and rinse are ok?
    Probably. When in backwash and rinse, is water being drawn into the skimmer?
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

  5. Back To Top    #5

    Join Date
    Sep 2014
    Location
    galena ohio
    Posts
    5

    Re: Multiport Pressure Problem

    Quote Originally Posted by JohnT View Post
    Probably. When in backwash and rinse, is water being drawn into the skimmer?
    I honestly did not go up and check to see if water was being drawn in through the skimmer. I did try to shut the skimmer off though when I changed to filter to see if it would work correctly on the main drains only and it did not change the symptoms.

    Back to another question I had, should the return valve be suctioning through the filter if the valve is set to closed or should that setting be able to shut it off completely? I'm assuming that should be able to shut off that back-feeding and may be an unrelated problem but could be a bad spider gasket.
    Kayak 16x32 Above Ground, Hayward S200 Sand Filter

Posting Permissions

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