Sealing off an outside toilet but continuing the drain

6 Apr 2010
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United Kingdom
We have an outside toilet that we will be demolishing. How do we seal off the drains to this toilet but keep the drain in working order? We are planning to build over this area but a toilet from inside the house was connected to the the same drains so we can't simply fill in with concrete as this may block the drain. Would it be best to replace this area with a straight piece of plastic drain that would then take waste straight along without further connection to this toilet? We can then build over.


Any suggestions?

Many thanks.
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