Connections to exterior soil pipe - advice needed

[Bruce]

I have just installed and plumbed in a new sink in a downstairs cloakroom that formerly had just a WC. I need to connect the 32mm diameter waste pipe (which passes through the exterior wall) to the

100mmm soil pipe. I will also be connecting a kitchen sink waste to this soil pipe - the previous occupant of the house ran it direct into a surface water gully drain.

The soil pipe is plastic and has stub connections ready for these waste pipes to go into. Can anyone point me towards a "how to" guide so I can make these connections using the correct components? Also, can these components be found in Wickes or B&Q or do I have to go to a trade plumbing supplier?

[Lobster]

You drill out the wall of the soil pipe at the bottom of the 'stub', and fit one of these rubber adaptors into the hole with your 32mm pipe:

I'm sure the DIY places will do them; certainly Wickes will.

David

[David Hansen]

On Fri, 18 Apr 2008 16:03:00 +0100 someone who may be Bruce wrote this:-

Are you sure it is a surface water drain?

It could be connected to a combined sewer. It is perfectly normal to connect a kitchen sink in this way, preferably via a back inlet gully. If not one of these then the pipe should discharge below the level of the grille, but above the level of the standing water.

[Tony Bryer]

If yours is like the ones I'm familiar with, you drill out the centre of the boss (50mm) and fix a boss adaptor suited to the diameter of your waste pipe. You can get ones that solvent weld into the boss socket, or ones like a rubber bung with a hole in the middle to take the waste pipe (lubricate with silicon)

[Clot]

I agree. Those were my thoughts as well. Though I recently came across a situation (not uncommon, where a washing machine was discharging to a surface water drain and polluting a water course).