Here us why cheap pan connectors eventually leak

[Rob Foster]

The plastic used for underground fittings & pipe does not have the same chemical make up as the above ground fittings & pipe, it does not have the same level of protection against the elements, especially UV protection from the sun. It breaks down much quicker than above ground drainage fittings, this is why it is much cheaper, and should not be used for above ground. Mind you, I suppose if the fitting in question will be cemented into the wall, it might be okay, but I for one, would certainly not recommend it.

Exactly it will be totally enclosed within the cavity wall
and its all fitted, checked for leaks at high volume and done, there was never any question of price it was in one of the vans so I used it...thanks for the info....being honest as we live near the coast the scour of wind blown sand wears away grey and black pipe much more quickly than the brown colour ...and as it has a rough finish it is easy to repaint than the shiny black stuff...just my observations
centralheatking

 

[Dunlopplumbing]

Exactly it will be totally enclosed within the cavity wall
and its all fitted, checked for leaks at high volume and done, there was never any question of price it was in one of the vans so I used it...thanks for the info....being honest as we live near the coast the scour of wind blown sand wears away grey and black pipe much more quickly than the brown colour ...and as it has a rough finish it is easy to repaint than the shiny black stuff...just my observations
centralheatking

I would check with the manufacturer regarding it's suitability for being in contact with mortar, as that might effect the underground fittings, although I am not sure myself, because we have never get involved in underground drainage work.
I often see underground fittings where builders have got their levels wrong, and a bit of the initial bend is above ground level, and the fittings have completely lost their rubber seal and or seal retaining cap/cover, or it is badly corroded, due to UV damage, which can be a major problem because many of them are concreted into garden paths or patios. I hope I have been of some help, we all keep learning every day, and just about when we almost know it all, we retire. 10 more years and I'm out of here.