What To Put On Immersion Thread To Stop Seizing?

[2point8ghiax]

Despite leaving the cylinder full of water and being careful, I have buckled the area around the immersion element. The element was really seized, and the cyl. has to be replaced.

What can I put on the thread of the new element to stop it seizing in future?

If it was on my car, I would put a smear of copper grease on the thread, is this permitted on domestic water situations? I'm thinking not!

 

[seco services]

i always use silicone grease.

 

[rojaca]

jointing compound on washer but never the thread.
and at the risk of being pilloried, unless you intend to drink the hot water, then...

 

[rojaca]

p.s always loosen and fully tighten immersion bosses etc with cylinders full. pressure exerted stiffens the body of the cylinder

 

[ajrobb]

can you use copper slip?

 

[tincup]

Dont think so. Copper slip is carcinogenic I think.

 

[RichieHoneybucket]

Like pump valves, always use heat before even trying to loosen. My old journeyman showed me that when I started my time in the 70s. Never damaged a cylinder yet or failed to get a circulation pump out.

 

[bab]

I always use a little neutral cure silicone on washer, never leaks , always comes out easy and if its vented who wants to drink that anyway, even unvented lay gunge in the bottom after a while .