Outside waste pipe from Bath

Eldi_Dos

Given the choice I would always opt for black pipes and gutters, especially on south or westerly aspects,as they are more UV stable.

One of the reasons tyres are black is the addition of carbon black during manufacture to improve strength and provide protection from UV.

Albermarle

https://forums.moneysavingexpert.com/discussion/comment/82081385#Comment_82081385

I have PVC white guttering, white windows, French doors etc all partly South facing with no issues.

It all depends on the quality of the goods and how they are formulated. Cheap black guttering will also fade over time.

Section62

https://forums.moneysavingexpert.com/discussion/comment/82080919#Comment_82080919

and push-fit connectors

Push-fit isn't ideal if the pipe has near-vertical runs and only limited support. Movement (e.g. thermal expansion/contraction) can cause the pipes to creep out of their sockets, ditto if the pipe is put under stress.

The OP hasn't posted a picture of the full run, but the bit we can see in the picture has a vertical drop and being above the flat roof would be difficult to support. I'd agree with using a push-fit elbow on the pipe coming out of the wall, but only if the pipe run can be re-arranged so the first length after the the elbow is closer to horizontal and can be securely clipped to the wall.

As it is, a vertical drop followed by a near-horizontal run is less than ideal, regardless of pipe/connector type.

Material-wise, for solvent-weld work it was common to use ABS pipes which tend to be thinner and more rigid than PVC. It isn't unknown for people not familiar with ABS to think the pipe has been damaged by sun and "gone brittle", even though it is in the same condition it was the day it was installed.

JJforever

Thanks for all your replies

I have just asked copilot for some 'branded' names and it's come up with:

1. Floplast black
2. Marley
3. Polypipe

Just for information, from the downward pipe, there is then a long connected pipe across the flat roof to the drainpipe. There doesn't seem to be any stabilisers so from the bend it's just laid across the roof to the downward drainpipe?

Thanks once again.

bjorn_toby_wilde

All three are good brands.

If it were me I’d use solvent weld as the rubber seals in push fit will also degrade in the heat. It’s much more rigid so less likely to sag. In my experience white seems to degrade much faster than black but I don’t know whether there’s any scientific evidence to support that.

If you can run it along the wall then it should be supported with a clip about every 50cm. I doubt it’s doing much harm to have it laid on the roof felt but it’s a bit of a bodge IMO and leaves and debris will just pile up against it.

prowla

waste pipe from Bath…

…could be quite a long way.

WIAWSNB

https://forums.moneysavingexpert.com/discussion/comment/82081676#Comment_82081676

Could you post some pics of the full pipe run, please? If you are going to have it all replaced, it's worth making sure it's done the best way and route.

Also, can you see that pipe on the inside? I suspect not, as it'll be under the bath or behind the panel. Whoever does the job should ensure the pipe is held firmly in the wall, and isn't accidentally pushed in when they work on it. Doing so could dislodge a fitting under the bath, with unpleasant consequences...

Albermarle

https://forums.moneysavingexpert.com/discussion/comment/82081703#Comment_82081703

In my experience white seems to degrade much faster than black but I don’t know whether there’s any scientific evidence to support that.

As mentioned earlier there is no black & white answer ( excuse the pun).

A UPVC pipe ( or window etc) is typically only about 80 to 90% actual PVC polymer. There are a number of additives mixed with it, before it is melted and extruded/injection moulded into the final part.

These are speciality chemicals, like heat and UV stabilisers, impact improvers, pigments and usually some cheap extender/filler. There is a huge variety of combinations, producing different properties of the end product. Plus as with all things there will be a general variation of quality and cost. Also a % of the product used will be recycled material and this can also have an effect, if not carefully controlled.

So a properly formulated white UPVC, will not suffer from UV degradation ( white windows are guaranteed a minimum of 10 years, and often will last 25 years), whilst a white pipe manufactured at lowest cost from a non mainstream supplier, or a cheap DIY range, may well have problems after just a couple of years.

The main issue is how much of the white pigment Titanium Diexide is in the formulation. If there is enough, then no problems with degradation will be seen . However it is expensive, so…..

We have had white guttering, downpipes and windows at the rear of our house for 25 years without any issues. I think they were made by Rehau, which is a respected make.

WIAWSNB

https://forums.moneysavingexpert.com/discussion/comment/82082333#Comment_82082333

The best choice between black and white pipes is a bit of a grey area.

JJforever

https://forums.moneysavingexpert.com/discussion/comment/82081833#Comment_82081833

So here are some more pictures. The comment you made about the connection to the wall and bath is a worrying one. I never thought of that, in which case would it be better to get a plumber than a handyman?