what fittings for hot and cold feeds to thermostatic mixer?

[glerwill]

Hi,
I have been making a bit of a buggers muddle of connecting the hot and cold feeds to a two outlet bath and shower mixer valve. There are 3 taps on the front controlling flow to bath, flow to shower and hot/cold.

I cut the hole for it (it is concealed) and used 15mm flexible hose with male compression fittings on each end. The one end used the compression fitting and went onto 15mm copper pipe. The other end, i took the olive and the nut off - put ptfe tape on, and screwed it into the hot feed (a female thread in the body of the thermostatic valve).

This joint leaked!

The threads felt a bit loose, even with a good amount of white tape on.

I've looked around on the forum and it seems I should have used boss white plumbers compound instead of white tape...... Is this right?

Also, Ideally i would have wanted to use a right angle fitting, before the flexible pipe, but got into male/male issues - which is why I put the flexible pipe straight into the body of the thermostatic valve!

Is there some sort of fittig I should be using for a better fit? What about a washer?

grateful for any advice...


doing the job tomorrow..... to resolve the slight leak!

rgds

Graham

 

[Phill Peck]

No you need to use the correct fittings

A flexible hose with a 15mm connection is not the same as a 1/2 inch thread you need a 1/2inch by 15mm compression fitting which you can buy in straight or angled then a small piece of pipe into your flexible hose