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

Thread: Alternative freeze protection and winterizing pipes thread

  1. Back To Top    #1

    Join Date
    May 2015
    Location
    Mount Cheaha Alabama
    Posts
    250

    Alternative freeze protection and winterizing pipes thread

    Over in the Deep End there are a few individuals dealing with the possible side effects of propylene glycol breaking down and consuming chlorine at a rapid pace during opening.

    @Chem Geek suggested a high saline (salt) water concentration as an alternative to propylene glycol, but as noted it would only achieve freeze protection to -21C/-6F. This is assuming it's mixed correctly.

    Then something popped into my head - what about Calcium Chloride?
    It's readily available at pool stores, some of you with concrete&gunite pools might already have some laying around?
    You can buy it as icemelter in any cold area, or Dowflake in pool stores.
    It's been used in loading heavy equipment tires forever to increase density and freeze protection in tires. While corrosive to steel I can't see it hurting PVC

    A 30% concentration by mass weight should achieve -46.1C/-51F freeze protection.

    And when you open up all you have is some added CH to your water
    30k in ground vinyl lined pool surrounded by decking in the woods.
    Hayward sand filter circa mid 80's
    If there is a way to do things less expensively and yield a superior product I am all ears

  2. Back To Top    #2

    TFP Guide

    AimeeH's Avatar
    Join Date
    Apr 2012
    Location
    Columbia SC
    Posts
    1,837

    Re: Alternative freeze protection and winterizing pipes thread

    I'm thinking you might be confusing cal-hypo (calcium hypochlorite) with calcium chloride. But I'll let a chemical expert chime in on this.
    18*36*23 true "L" vinyl IG 29,000 gallons. SWG. TF-100 test kit.
    http://tftestkits.net/splash-page.html

  3. Back To Top    #3

    Join Date
    May 2015
    Location
    Mount Cheaha Alabama
    Posts
    250

    Re: Alternative freeze protection and winterizing pipes thread

    Quote Originally Posted by AimeeH View Post
    I'm thinking you might be confusing cal-hypo (calcium hypochlorite) with calcium chloride. But I'll let a chemical expert chime in on this.
    No confusion on my end.
    Calcium hypochlorite CA(CLO)2 is a bleach alternative that continually raises CH and provides FC for shocking
    Calcium chloride CACL2 is used to raise CH in pools.
    30k in ground vinyl lined pool surrounded by decking in the woods.
    Hayward sand filter circa mid 80's
    If there is a way to do things less expensively and yield a superior product I am all ears

  4. Back To Top    #4

    Join Date
    May 2015
    Location
    Mount Cheaha Alabama
    Posts
    250

    Re: Alternative freeze protection and winterizing pipes thread

    I'm going to run a summer time freeze test to verify PVC compatibility with Calcium Chloride and a few test samples in my garage freezer.

    Thinking glass test jars as apposed to plastic buckets so there isn't any leaching from one PVC to another.
    30k in ground vinyl lined pool surrounded by decking in the woods.
    Hayward sand filter circa mid 80's
    If there is a way to do things less expensively and yield a superior product I am all ears

Posting Permissions

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