Pressure relief valve fittings

[cdbe]

Hi, how do I connect to 15mm copper? The left hand inlet is shallower with a flat base so I presume needs something with a fibre washer to seal, the right hand is deeper and think I've seen similar with a single ended nut that screws into the fitting and compresses the olive?? And PTFE/loctite55 on all threads?

Thanks.

 

[oilhead]

Both ports are 1/2" BSP. If you are replacing one, then the fittings should be able to be re-used. If screwing into the inlet with a nipple, then a new fibre washer will be required. The outlet is usually connected with an internal compression nut.

 

[cdbe]

Great thanks, internal compression nut - that's what I was visualising - can't find one at screwfix/toolstation etc but amazingly just managed to find one in my plumbing box. I'm converting to sealed system so nothing there previously.

 

[Madrab]

The nipple in your third picture would be used on a pipe with a flared end and then a fibre washer would be used.

Use 2x 1/2"x 15mm compression irons with PTFE/Thread cord to seal.