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

Thread: Head loss due to 45 and 90 degree elbows

  1. Back To Top    #1

    Head loss due to 45 and 90 degree elbows

    I am replacing my whisperFlo with a VS+SVRS IntelliFlo. Due to some pipe obstructions interfering with the SVRS top mounted controls, I have to relocate the pump by adding four to six 45 degree elbows (to go up over pipes and then back down) and maybe another 2-3 feet of pipe lenght. My piping is 2" diameter. Should I worry about introducing additional headloss due to the extra plumbing or is it negligible?

    The issue I have is that I need to extend the pump to maintain a 12" straight suction pipe at the inlet (according to Pentair). Suggestions are appreciated. Thank you.
    Richard
    Temecula, CA
    28,000 Gal. In-Ground plaster and tile, Total Control AutoPilot with SC-60 SWG and PH control, Pentair EasyTouch 8, EasyTouch Wireless Remote, Intelliflo VS+SVRS pump, Intellibrite lighting, Pentair Quad 100, Solar heating, Pentair Mastertemp 400 Gas Heater, The Pool Cleaner 4x, Aquabot Turbo T2 Robotic Cleaner, Water feature spillover from SPA.

  2. Back To Top    #2
    mas985's Avatar
    Join Date
    May 2007
    Location
    Pleasanton, CA
    Posts
    9,918

    Re: Head loss due to 45 and 90 degree elbows

    If you are replacing 3 90s with 6 45s, it really isn't worth it since the head loss is about the same. Even if you replace 3 90s with 3 45s, not sure how you would do that, but because you have so much head loss elsewhere the difference isn't really all that great either.

    The biggest bang for your buck is to upsize the pipe. The difference between 2" and 2.5" pipe on the whole pad can be as much as 8' of head @ 90 GPM or 2' @ 45 GPM. But given that you have the Intellilflo and probably operate at lower flow rates, it probably won't really matter all that much.
    Mark
    Hydraulics 101; Pump Ed 101; Pump and Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, 1/2 HP 2sp pump, 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: Head loss due to 45 and 90 degree elbows

    Thank you mas985. Actually, I am not replacing the elbows. It is a net add because I have to go under existing pipes and then back up which will require 4x45 degree. The 2.5" pipe sounds like an idea. Since I have solar heating, I may consider the two solar heating runs (ap and down). Thanks.
    Richard
    Temecula, CA
    28,000 Gal. In-Ground plaster and tile, Total Control AutoPilot with SC-60 SWG and PH control, Pentair EasyTouch 8, EasyTouch Wireless Remote, Intelliflo VS+SVRS pump, Intellibrite lighting, Pentair Quad 100, Solar heating, Pentair Mastertemp 400 Gas Heater, The Pool Cleaner 4x, Aquabot Turbo T2 Robotic Cleaner, Water feature spillover from SPA.

Posting Permissions

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