"Tim S" wrote in message
...

The two things that worry me about plastic a

1) Will the push-fit grippers give way and blow the joint apart (same with
copper push fit)? My static mains pressure is 7.5 bar (fairly high).

2) How long do those O-rings actually last? I pondered this also after I
unclipped the cooker's from the gas bayonet open the other day...

I can vouch for 28 years in both mains and CH.
My mains pressure is high enough to explode a watering computer,
I have had to put a 3.5 bar reducer on the garden tap as a result.