uPVC plumbing oddity

Paint the cast-iron black?

Owain

No, we're having white pipe, and white AAV. Following sage advice on this very forum, rather than digging up the cast-ironsewer join, I will chop the cast-iron off about 6" above the ground, and join to that.

In grey :(

Maybe some strategically placed planters will keep SWMBO happy.

In the days of high volatiles gloss paint, you paint PVC with gloss top coat only - no undercoat. The top coat solvent-welds to the PVC surface, so it isn't ever going to come off.

I have not tried painting any PVC since the low volatile gloss appeared, so I don't know if this still works as well. I think I still have an old can of high volatiles gloss paint for the purpose.

Is white UPVC pipe suitably UV stable for outside use? I thought that only black and grey were? Just a thought.

Our white guttering is a good as it was 15 years ago ....

Yes but guttering is designed to go outside. And white cladding similarly is UV stable. I thought (rightly or wrongly) that white soil pipe was for indoor use just as orange is for underground and not to be used above ground.

I've got a white overflow pipe poking outdoors. On a south facing wall. Seems to have survived some 20 years ok. More than can be said for black PVC guttering which goes brittle.

I see a lot of white 40-50mm pipes outside - they seem to survive too.

That's interesting as I have some 40mm white outside and that has both yellowed and formed a crazed surface which harbours dirt. I think I fitted it around 1985. The plastics might be better now.

Well that's not too bad...

I fitted some 40mm white in 1994 and last week it failed! I think one of the sons knocked the pipe but it just broke off nearly flush with the wall (spit). The bits sticking out from the break were a bit friable.