I have a slow drip on my rad where the valve tail screws into the
rad...I have tried ptfe tape also tried ptfe paste (Goldseal) with hemp,
Boss white with hemp but the drip remains...Any ideas on a cure ??
The system is a combi with a working pressure of 2 bars...
Generally PTFE works - if layered up to produce a gradually increasing
thickness, it's hard to see how it won't give a watertight seal between
non-deformed parts. However, if one (or both) of the parts have become
deformed such that the gap is no longer uniform, I've found "Instant
Gasket" excellent. Bought from a "Halfords", it is intended to produce a
water-tight seal where the gap may not be perfectly uniform. I usually
run a bead around the top of the thread, let it dry, and then apply
layered PTFE tape as normal.
Thanks for the reply...I do that with the Goldseal but it still leaks.
When I was working I used goldseal on steam pipes at 100lb pressure and
it was solid.....I have been out of the trade for 15 years and wondered
if there was any additive I could put in the system to seal it like
radweld is supposed to do an a car radiator ??
I've never found it necessary. Nice, clean, bright, corrosion-free
threads plus PTFE tape works very much most of the time. I've only
needed more where one part or both had got distorted. I suppose that you
could apply "instant gasket" to the thread and tighten the joint whilst
it was still wet..
However, for just one leak on one radiator, I wouldn't risk compromising
the while system by adding something deliberate designed to block
"holes" up. It might "decide" that a pump, or valve needed "fixing"
too.. not to mention the inside of the boiler..
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.