weeping plumbing joints

[kiwijbob]

I'm new to actual 'hands on' plumbing and I've recently installed a new
1.4 bar shower pump. all seems fine but I'm pulling my hair out :mad:trying
to stop some weeping where the male threaded part of the fitting meets
the female part of the shut-off valve as shown in the below link.
I firstly tried without any material to seal the joint using only elbow grease
which weeped, then I tried PTFE tape with no luck... it still weeped, I now
have the joints wrapped in Hemp & some copper joint cement, I'm going to
let water into the system this evening to check for weeping, if this weeps
what next???? I saw some white cement in B&Q, this maybe?

[broken link removed]

 

[Carpenter]

BOSS White and hemp fibre is the preferred material for screwed connections like this- the jointing compound provides the seal while the fibre just reinforces the joint and aids the compound in filling large gaps. This should work ok.

 

[beldin]

Possibly heavier PTFE tape would help. I got some gas tape from B&Q a while ago. I had the same problem with a radiator valve. In the end several loops with the heavier GAS PTFE tape did the trick.

 

[Carpenter]

The yellow coloured, heavy gas tape is better alright but I'd prefer hemp and Doss white over PTFE tape any day, especially for this type of application.