The Wall
Forum / Radiant Heating / grit in system
  • Post a Reply to this Thread

    grit in system (2 Posts)

  • joeychitwood joeychitwood November 10, 2012 @ 5:38 PM
    Contact this user

    grit in system

    I have a radiant heat system using 3/8" Onix tubing - ten 200' loops, single zone, currently fired by a Crown Bimini boiler. For the last seven years , whenever I've purged the system because of circulation problems I get a gritty substance in the water - it's mostly grey , white and tan with some magnetic particles . There's usually a couple teaspoons to a couple tablespoons per three gallons of water. So the questions are: What is this stuff? Where is it coming from? How can I stop it? Why me?
    Reply
  • kcopp kcopp November 10, 2012 @ 5:56 PM
    Contact this user

    Pretty good....

    bet its Rubber. The Onix starts to break down... whatever you do NOT add gycol. That will kill the tubing. I would however flush it out , clean it w/ a good product and add a inhibitor. Rhomar has these products.
    Reply
  •  
Post a Reply to this Thread