Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 3 of 3

Thread: main drain not pulling?

  1. Back To Top    #1
    Mod Squad kimkats's Avatar
    Join Date
    Jul 2012
    Tallahassee, FL

    main drain not pulling?

    We have a main/bottom drain in our AG pool. Seemed like a work saver when we talked to installer about it and thought about it.

    WELLLLL it does not seem to do much of anything-leaves and bugs just float by it when it the pump is on low. Even when I put the pump on high and close the skimmer line it does not do much. It will hold a leaf on it but I have to put the leaf on it otherwise it just floats on by.

    I guess my question is this-how much does YOUR main drain pull? Everything else is working great!

    TFP Moderator 33x52 round AG 25,600 gals Sand Filter 1.5hp Pump - 2 Speed, SLAM, Pool School, Recommended Levels, Recommended Chemicals, Pool Math, Chlorine/CYA Chart, TF-100 Test Kit

  2. Back To Top    #2
    mas985's Avatar
    Join Date
    May 2007
    Pleasanton, CA

    Re: main drain not pulling?

    Standard main drains aren't really designed to do much so I wouldn't expect much out of them. They are deliberately designed to reduce the suction force and the chance of entrapment so you will not get much debris moving toward them. They have only a few inches of cleaning radius and about the only thing they are good for is deep end circulation but you can get that using other methods such as a cleaner, deep return or even a return pointed to the deep end. So IMHO, I don't see much value in them.
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

  3. Back To Top    #3

    Re: main drain not pulling?

    Funny you posted this question, I just was wondering the same thing.......I thought ours was broke. Me and my daughter were playing and I dove down near the main drain to get a torpedo and put my hand near it and thought I would be able to feel some suction like I do from the skimmers, and pretty much didnt feel anything. Asked my hubby about it and he said it was fine. I guess they aren't meant to be pulling in too much water.

Posting Permissions

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