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

Thread: 12 inch straight pipe before flow sensor

  1. Back To Top    #1

    Join Date
    Mar 2015
    Location
    Harvey, LA
    Posts
    300

    12 inch straight pipe before flow sensor

    Why is it necessary to have 12" of straight pipe before the flow sensor? I accidentally left out some of this in the heat of the plumbing moment, and things seem to be working fine even though I'm slightly short on this. Is it such a big deal that I should be cutting and fixing this? Methinks if the flow sensor is showing flow when it exists and the cell is generating when the pump is on I don't need to cut and adjust...
    17.4k gallon IG pool with attached spa (spa itself is 730gal), Super Blue Diamondbrite plaster, Circupool SI-45+ SWG, BH/Hayward Cartridge Filter, 2hp 2speed Hayward Super II pump, , Jandy Valves, Waterway Skimmers, Rheem 400k Heater, Polaris 360 cleaner, built 2000+-, replastered June 2015, TF-100 kit---Here's my pool test reading history

  2. Back To Top    #2
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: 12 inch straight pipe before flow sensor

    Idea is so the water is not too turbulent when it gets to the switch. Likely does not matter unless you are trying to run at lower speeds.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  3. Back To Top    #3

    Join Date
    Mar 2015
    Location
    Harvey, LA
    Posts
    300

    Re: 12 inch straight pipe before flow sensor

    Quote Originally Posted by jblizzle View Post
    Idea is so the water is not too turbulent when it gets to the switch. Likely does not matter unless you are trying to run at lower speeds.
    So basically, if the flow sensor feels flow is adequate when the 2 speed pump changes to low, then I'm ok? That's what I'm thinking that means...I didn't test it on low last night when I installed it, but I will check it out when it changes to low this afternoon...I run 6 hours on high then swap to low for the remainder of the 13 hour cycle...I know it's probably longer than the pump needs to run, but we like the waterfall effect and we also haven't had a chance to work out exactly how long it must run to do the job---and that would probably change now anyway with the new SWG.
    17.4k gallon IG pool with attached spa (spa itself is 730gal), Super Blue Diamondbrite plaster, Circupool SI-45+ SWG, BH/Hayward Cartridge Filter, 2hp 2speed Hayward Super II pump, , Jandy Valves, Waterway Skimmers, Rheem 400k Heater, Polaris 360 cleaner, built 2000+-, replastered June 2015, TF-100 kit---Here's my pool test reading history

  4. Back To Top    #4
    mas985's Avatar
    Join Date
    May 2007
    Location
    Pleasanton, CA
    Posts
    11,487

    Re: 12 inch straight pipe before flow sensor

    and we also haven't had a chance to work out exactly how long it must run to do the job
    Whats to work out? Run the pump for 4 hours and see if it clean enough for your liking.
    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
  •