Drains for new extension

[nickjb]

I'm in the process of planning a new kitchen and WC. I'm not sure what the best way to route the new drains will be. The current drains run right under the the new extension. I'm not keen to box in the soil stack and build over the existing drains so I think I need to cut into the shared sewer (not public) and put an additional inspection chamber in. The existing drain could take the waste from the kitchen sink, how would i couple to this? I'm think I should run the soil stack over the kitchen roof and down the outside (the red circle on the plans), would this be OK? How do I connect the wastes from the laundry and WC sinks into the new drains?

existing and proposed drawings

Untitled

• nickjb
• 25 May 2011
• 1

proposed extension

Untitled

• nickjb
• 23 May 2011
• 2

Existing soil stack runs beween the single and quad window

 

[Fredthefly12]

You'd be better with no further connections to the sewer mate, if it's a common sewer then you need to deal with a Water/Sewer utility & that can be a right pain. Stick with your existing sewer connection as long as the 'invert' in not an issue, contact your LA Building Control, take their advice & follow it to the letter.

 

[Hugh Jaleak]

You may have to rethink the stack idea. Running it down the roof will look unsightly, and may not be allowed. Whats the problem with boxing it in? Existing drain can either be protected under the new floor or if need be, replaced prior to the floor being laid.

Kitchen drain. Depends on existing pipe but couplers are available to join differing materials without a problem providing the existing pipe isnt encased in concrete....

Laundry and W.C. sinks, you need to either make provision for an open gulley at a suitable position or look at a stub stack in the W.C. to take the soil from the W.C. and the wastes from the sinks.

Connecting to the existing sewer depends on its depth, size etc. If its a pre 1937 property then that sewer is the water authority's remit anyway. As already said if its possible to use the existing connection then that may be easier. Building Control approval will be needed regardless of what you choose to do.

 

[Fredthefly12]

You may have to rethink the stack idea. Running it down the roof will look unsightly, and may not be allowed. Whats the problem with boxing it in? Existing drain can either be protected under the new floor or if need be, replaced prior to the floor being laid.

Kitchen drain. Depends on existing pipe but couplers are available to join differing materials without a problem providing the existing pipe isnt encased in concrete....

Laundry and W.C. sinks, you need to either make provision for an open gulley at a suitable position or look at a stub stack in the W.C. to take the soil from the W.C. and the wastes from the sinks.

Connecting to the existing sewer depends on its depth, size etc. If its a pre 1937 property then that sewer is the water authority's remit anyway. As already said if its possible to use the existing connection then that may be easier. Building Control approval will be needed regardless of what you choose to do.

Good advice mate, but I think you mean post 1937??

 

[Hugh Jaleak]

Public Health Act 1936/7. Any shared drain or sewer laid before 1st October 1937 is the responsibility of the Water Authority.

 

[Fredthefly12]

Thanks for clarifying that Hugh. Here in Scotland if two property's drain join then it's a sewer & it's up to Scottish Water to maintain.

 

[joe-90]

...and I thought he couldn't spell "Lancashire"

 

[Fredthefly12]

With the greatest of respect to the people of Lancashire, I'm in Scotland Joe, God's country. Where you get on a bus & people talk to you, where you go into a shop & come out laughing, cause the people are friendly mate.