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

Thread: Main drain with port in side- pool spa combo

  1. Back To Top    #1

    Join Date
    May 2016
    Location
    Seffner, fl
    Posts
    3

    Main drain with port in side- pool spa combo

    We have a pool spa combo . The spa has a main drain with a port on the side. The main drain is capped and it looks like the port on the side of the main drain is also capped ( in the spa) . We bought the house and have never owned a pool so we are not sure how to operate the spa. The spa has its own dedicated pump. We are trying to figure if the current set up is correct. Why would the main drain in the spa have a cap/plug in the bottom and the port on the side also be closed/capped? My husband uncapped the main drain and the pump them filled and seamed to work properly. However the suction is tremendous even with anti vortex drain cover in place. We then replaced the cap in the main drain and figured the port side is what should be uncapped. So the question is... Why would the main drain in the spa be capped in the bottom and at the port on the side of the main drain? Where does the port on the main drain run to?
    Seffner Florida 20k gal, IG cement , 1.5 HP pump, sand filter.

  2. Back To Top    #2

    TFP Guide

    In the Industry

    Join Date
    Apr 2015
    Location
    tucson, arizona
    Posts
    938

    Re: Main drain with port in side- pool spa combo

    Usually with a drain at the bottom and one in the side, that is known as split suction. They would be tee'd together and run back to the a 3-way valve. With both drains working there is less chance of entrapement. If the spa has a second pump ,that would be for the jets and would need another source of suction.

  3. Back To Top    #3

    Join Date
    May 2016
    Location
    Seffner, fl
    Posts
    3

    Re: Main drain with port in side- pool spa combo

    Would that mean that the bottom should be capped and the side port open? Would the side port be what provides the suction?
    Seffner Florida 20k gal, IG cement , 1.5 HP pump, sand filter.

  4. Back To Top    #4

    Join Date
    May 2016
    Location
    Seffner, fl
    Posts
    3

    Re: Main drain with port in side- pool spa combo

    Quote Originally Posted by kadavis View Post
    Usually with a drain at the bottom and one in the side, that is known as split suction. They would be tee'd together and run back to the a 3-way valve. With both drains working there is less chance of entrapement. If the spa has a second pump ,that would be for the jets and would need another source of suction.

    Would that mean that the bottom should be capped and the side port open? Would the side port be what provides the suction?
    Seffner Florida 20k gal, IG cement , 1.5 HP pump, sand filter.

  5. Back To Top    #5

    TFP Guide

    In the Industry

    Join Date
    Apr 2015
    Location
    tucson, arizona
    Posts
    938

    Re: Main drain with port in side- pool spa combo

    It means that both drains should be open so the suction is split between them. As you have said with only one uncapped the suction is to strong. This is only if both bottom and side drains are teed together and have dedicated line back to pump. Maybe a picture of the spa and equipment could help

Posting Permissions

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