Drainage pipe from sink question

[MoonMan2]

This is a photo of underneath the floor pointing to the kitchen sink.

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• MoonMan2
• 5 Sep 2010
• 2

I know the horizontalish white pipe, starting from the far right is the drainage from below the kitchen sink.

What is the big brown vertical pipe on the left.

Could someone explain what is happening here?

 

[Nige F]

Not really You need to get a bricky and a plumber to have a look Can only diagnose so much from a photo - tho` its a lot better than some of the Q. on here

 

[Bahco]

It is an underground drainage pipe. Is there a gulley nearby

Try tracing it back.

 

[looneyfitter]

Looks like a soil vent pipe to me, taking the waste from your bathroom/wc etc. You need to get them pipes under the floor lagged as well matey, under the floor is classed as eternal and liable to freeing.

Gareth

 

[TicklyT]

Or is it a soil & vent stack, running through a boxed in section in a corner to an upstairs bathroom, and ultimately out through the roof?

 

[MoonMan2]

Right, as you guys suggested, I did a little investigating and followed the pipes.

The copper pipe on the far left is for the cooker, do gas pipes need lagging?

I am a little concerned that the white drainage pipe is going uphill first and then connecting to the large brown drainage pipe. Nothing else leads to large vertical pipe. There is simpy a bedroom above the kitchen.

 

[looneyfitter]

gas pipes dont need lagging however, under the floor like that i would class as a void and to bring it up to regs, would box it in.

The kitchen waste should have a 1:30 fall to the soil pipe.,

The soil pipe will go up, take the bathrrom and wc waste the pop out through the loft.

Hard to tell from the pic

 

[MoonMan2]

I have just had a plumber out to look at kitchen and I showed him the photos.

Here is a better photo:

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• MoonMan2
• 8 Sep 2010
• 2

He said right away that the drainage pipe from the sink should be going "downhill" and not up as has been pointed out, so right away that needs to be fixed.

He explained to me that the brown vertical 4 inch pipe is a concartina(think that is what he said). He said this pipe usually goes all the way to the loft as indicated by TicklyT. He said that most kitchens would have a box at the corner where it would be. In my situation in certainly does not run up to the loft, at best it goes to just under the work surface top in the kitchen. But I can't see because the under the kitchen work top where I would expect this vertical pipe to be it is "boxed off" in the cupboard. I have made two drawings to indicate what I think is happening.

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• MoonMan2
• 8 Sep 2010
• 2

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• MoonMan2
• 8 Sep 2010
• 2

As can be seen from the bird's eye, the cupboard at the corner of the kitchen where I would expect the 4" vertical pipe is is closed off - so would need joiner to remove it.

In looking at the side view drawing, is it OK to have the pipe to this height, ie as long as it is above the kitchen plug hole? I am not sure what height it goes up to but will know that soon when the joiner removes cupboards. Or would it be better to get the plumber to raise it above the kitchen work top and box it in at corner? If this is a viable option, I am a little concerned about any odour I may get from this pipe if it ends in the kitchen.

It can't go through the ceiling - that is not an option.

 

[looneyfitter]

As long as it is higher than the sink waste inlet to the stack then you will be fine. It will have an air admittance valve on it. Leave it bee

 

[Nige F]

As long as it is higher than the sink waste inlet to the stack then you will be fine. It will have an air admittance valve on it.

Will it , Kimosabe Maybe not looking @ the other lash up with the plumbing . I genuinely feel sorry for the O.P