Leaky low loss leader union

[Ross1978]

Hello good people

Have a Spirocross AX header on our system, which has had a slow leak from the 2 couplers on one side since I bought the house last year.

We've just had the boiler moved, and I've done all the wet piping up myself, so I thought I'd strip down the header and re-do the joints. I've just pressure tested the boiler side of the system and now I have 4 slow leaks instead of 2.

The flanges on the sides of the unit are all good, I think they have fibre washers in there, and they have been fine so I've left them alone, it's leaking on the compression joints where it meets the 35mm pipe, or maybe the threaded part of the adapter which screws into the header, I am not 100% sure.

I've tried V2-plus on round 1, plenty of Gripaloc on round 2, have cleaned threads and replaced pipes and olives on all sides, also tightended them up as much as humanly possible without pulling the thing off the wall.

And still it leaks.

Before I go for 3rd time lucky, can someone who has installed more of these than me (zero) impart some wisdom on how to seal the threads properly?

Cheers
Ross

 

[Ross1978]

Stripped it down, olives were hardly compressed, I could pull them off quite easily despite maybe overtightening the nuts. I think I must have put so much compound in that I couldn't tighten up the nuts against the olive. Also two of the nuts on the compression adapter were out of round so me or a predecessor must have put too much elbow juice into it at some point.

4 new compression adapters on order, fingers crossed.