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Thread: Installing new whisperflow 2.5 hp

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    Join Date
    Jun 2015
    Location
    Austin, Texas
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    14

    Installing new whisperflow 2.5 hp

    Replaced a whiperflow 2.5 hp sf 1.05 with new 2.5hp uprated. Does this matter? Second had to use a lot of teflon on pump suction side almost 20 wraps sealed well and couldn't get pressure side to seal without a little leek. Tried 20 wraps but didn't want to go anymore in fear of cracking any kind of sealant better than teflon tape or tips would be appreciated. The male pipes are the grey ones for high heat and have had trouble in the past with these.

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    mas985's Avatar
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    May 2007
    Location
    Pleasanton, CA
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    11,482

    Re: Installing new whisperflow 2.5 hp

    I don't think they make a WF 2.5 HP with a 2 SF. Or did you mean 1.2 SF?

    A full rated and up rated pump with the same label HP are different in "power". What is the application? Too large for just pool. Do you have a spa too?
    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

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    Jun 2015
    Location
    Austin, Texas
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    Re: Installing new whisperflow 2.5 hp

    No spa its just a pool with the in floor cleaning system. The pump is uprated.

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    In the Industry

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    Jan 2012
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    Re: Installing new whisperflow 2.5 hp

    20 wraps of tape seems a little excessive. I typically use 3-4 wraps and a bit of pipe dope.

    See link below for hi-temp union that I try to use so there are no issues. You can tighten fitting without cutting pipe.

    Hi-Temp CPVC Union 2 in.
    25K aggregate IG, Intellipro, FNS48, Polaris 360, PG2000 fiber optic light source

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