Convert gully drain to stub stack - Convert gully drain to stub stack

[jjpearce05]

Hi,

I plan to build a conservatory on the back of my house. At present there is a gully drain just outside the kitchen window, which serves the kitchen only.

The conservatory will cover this drain.

As I don't really want an open drain under the conservatory, I have considered converting the gully drain to a stub stack - maybe in 50mm, rather than 110mm

I notice that Wickes etc do a "bung" for converting 110mm soil pipe down to 50mm - could I just insert this into the drain ?

Wickes also sell soil pipe with a gasket on the end for connecting plastic soil pipe into other types of soil pipe - could I just insert this into the gully to create a soil stack

Or is the preferred method to dig the gully drain out and create a "proper" soil stack system

Other suggestions ?

[Tony McC]

I think you'll find that this "bung" on offer at Wickes is for adapting a 50mm pipe to 110mm, and not t'other way round, unless a macerator is involved. General rule of thumb for drainage - pipes NEVER get smaller as you follow them downstream.

As I seem to say time and time again: I cannot comment on drainage schemes that I cannot see. Occasionally, a job is so straightforward, or the poster does such a grand job of describing the pertinent features of the site and the drains, that I can suggest a solution, but posts along the lines of "there's a pesky drain under me conservatory" leave me with no chance!