what speed is the pump at ? kettling is caused by corrosion and scale build up in boiler. you can buy a chemical that gos in your system and cures that . i always use the sentinel product. check there web site it will tell you more.
hi-spec plumbing
April 2007
Automatic Answer
We may have found other answers which could help you.
howtomendit.com for free repair help, information and advice.
