Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 4 of 4

Thread: Blowing air through waste port/pump

  1. Back To Top    #1

    Join Date
    Sep 2016
    Location
    MA
    Posts
    2

    Blowing air through waste port/pump

    Hello community,

    I have a question about closing pool. It's an inground pool and has Vari-Flow 710 handle and Hayward sand filter. I have one of those plugs that goes in the skimmer for winterizing and allows you to leave water level above skimmer. However the plug doesn't have a cap that can be removed. I will need to blow out the skimmer line from somewhere in the system and have someone else install the plug while I'm pressurizing the system with air. My question is in regards to the best way to blow out the line. My instinct is to set the Vari-Flow to Waste and blow air through the waste drain (which is currently not hooked up to any plumbing). This means air would flow backwards through the system starting at the waste drain and then traveling through the pump then the skimmer line. Is there any danger in air flowing backwards through the pump? Will this spin the pump the wrong way and damage it?

    Thank you!

    Matt

  2. Back To Top    #2
    mas985's Avatar
    Join Date
    May 2007
    Location
    Pleasanton, CA
    Posts
    11,490

    Re: Blowing air through waste port/pump

    Welcome to the forum!

    Blowing through the pump and multi-port isn't likely to work because you will loose a ton of pressure.

    Why don't you just take off the pump lid and blow air into the pipe inlet directly?
    Mark
    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

    Join Date
    Sep 2016
    Location
    MA
    Posts
    2

    Re: Blowing air through waste port/pump

    Thanks mas985, but why would you lose pressure? Isn't the pump and valve water tight and therefore air tight? I thought the drain would be easier to create an airtight seal for blower end of shop vac...

  4. Back To Top    #4
    mas985's Avatar
    Join Date
    May 2007
    Location
    Pleasanton, CA
    Posts
    11,490

    Re: Blowing air through waste port/pump

    Friction loss! Same reason there is pressure loss with water in sealed plumbing.
    Mark
    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

Posting Permissions

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