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Thread: Can't get return lines and skimmer to blow out

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    weatherillgrp's Avatar
    Join Date
    May 2014
    Cortez, CO

    Can't get return lines and skimmer to blow out

    I have winterized my pool for 8 years. This year, following the same process as previous years, I can't get the return lines and skimmer to blow out. I drained the bottom of the filter, replaced plug and put the multi port valve on winterize. Attached shop vac on the backwash outlet on filter and attempted to blow out lines. As done in previous years I close the skimmer valve and plug one of the two returns to maximize pressure on the only open return line. It tries to purge but there is not enough air pressure to blow it out. It seems as though something is blocking full air from getting through the line. Block that return and opened the other but got same results. If I open the skimmer valve and try to blow it out the same happens. Any suggestions would be appreciated.
    18K gal, IG vinyl, 1 hp single phase Pentair Pinnacle pump part 7-177474-01, Star-Rite Cristal Flow Filter model T-240BP-1, 266,000 BTU Raypac gas heater model PR266AENC, Coverstar electric safety cover, Hayward Navigator Pool Vac, Pentair model 300 Auto Chlorine Feeder( not using). TF-100 Test Kit. Built June 2007

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    TFP Guide

    Catanzaro's Avatar
    Join Date
    Jul 2014
    Monmouth County, New Jersey

    Re: Can't get return lines and skimmer to blow out

    replaced plug and put the multi port valve on winterize
    Place multi-port on "recirculate", not winterize. Only when you are done with everything and you have drained your filter, then you move to "winterize". Unless I missed something, this is what you stated, correct?

    Also, I have never heard blowing out through the backwash line. Are you sure, that in the previous years, you set it on "winterize?" Why not create an adapter out of your skimmers, if not possible at equipment pad.

    Is it possible you also have to place the multi-port on backwash and try blowing out through the system. I would try both to see which one works.
    14,700 gallons IG Pool Vinyl Liner - Octal Circulation System
    Hayward Pro-Series 350 LB. Sand Filter Model # S270T - 2" Plumping
    Hayward CL2002 Chlorinator - Hayward Super Pump 2 HP Model # k48m2n111
    Hayward AQR9 SWG 25K Salt Cell & TF-100 Test Kit + Speed Stir
    Gulfstream HE125RA - 117K BTU Heat Pump - Date of Build is 11-2013

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