Outside kitchen-sink drain pipe corroded

[denso13]

Plastic or metal, indoors or out, fall pipe or drain pipe, or other?

I guess the one the thread is all about in post #42.

 

[Jeff543]

Plastic or metal, indoors or out, fall pipe or drain pipe, or other?

Can you see a photo of it? Black pipe, doesn't look metal.

 

[23vc]

Doesn’t need it

 

[Jeff543]

Doesn’t need it

Why not?

 

[denso13]

Why not?

It may discolour, especially push fit, but why do you believe it needs protective paint?

 

[Jeff543]

It may discolour, especially push fit, but why do you believe it needs protective paint?

See the UV damage that the original grey pipe got (in the OP).

 

[denso13]

See the UV damage that the original grey pipe got (in the OP).

That looks like more than UV damage to me. The new pipe shouldn't be affected like that but you can use a good quality gloss paint with the appropriate undercoat if you wish.

 

[23vc]

The old one survived since the 70s. People don’t paint plastic waste pipes unless they’re the wrong colour. The cost of the paint is probably more than the couple of quid the new bit of pipes worth.

 

[Bullet-Proof_Biscuit]

Wall penetration should be mortared IMHO. Replace.

 

[Jeff543]

Wall penetration should be mortared IMHO. Replace.

Why's that?

 

[Nige F]

Tell him to swap it for white to match the existing

And discharge below the gulley grid

 

[Harry Bloomfield]

And discharge below the gulley grid

My 1950's didn't, but I changed them years ago because it seemed sensible. Is it a rule now?

 

[Bullet-Proof_Biscuit]

My 1950's didn't, but I changed them years ago because it seemed sensible. Is it a rule now?

it just helps stop the bricks getting wet all the time, which can lead to issues such as frost damage etc

 

[Hugh Jaleak]

My 1950's didn't, but I changed them years ago because it seemed sensible. Is it a rule now?

It's in the Regs now, idea is the full force of the discharge is available to clean the gulley, and avoids build up of detritus above the grid, which usually stinks to high heaven and eventually blocks up. (Having just sorted out the ex Mother in Laws, I can vouch for how unpleasant they can get.... That is being changed to a plastic grid and the pipe extended next time I'm over there!)

 

[Harry Bloomfield]

It's in the Regs now, idea is the full force of the discharge is available to clean the gulley, and avoids build up of detritus above the grid, which usually stinks to high heaven and eventually blocks up. (Having just sorted out the ex Mother in Laws, I can vouch for how unpleasant they can get.... That is being changed to a plastic grid and the pipe extended next time I'm over there!)

Thanks, I just converted mine, because it seemed sensible. I still ought to do the utility sink + washer's drain - a job for the coming summer.