How to terminate this old sink waste into the soil pipe

[gdallas]

Hi Folks,

how would you go about terminating that un-required sink waste into the soil pipe so that I can close the floor over for good?

is there a cap or something available to buy?

Thanks

 

[CBW]

If it’s 1.1/4”: https://www.screwfix.com/p/mcalpine-s23u-multifit-blanking-plug-white-32mm/73053 or one of these and possibly a coupling if you have solvent cement https://www.toolstation.com/socket-...MI9MDJtKun6QIVwu7tCh3lrwz5EAQYASABEgKyV_D_BwE

 

[gdallas]

If it’s 1.1/4”: https://www.screwfix.com/p/mcalpine-s23u-multifit-blanking-plug-white-32mm/73053 or one of these and possibly a coupling if you have solvent cement https://www.toolstation.com/socket-...MI9MDJtKun6QIVwu7tCh3lrwz5EAQYASABEgKyV_D_BwE

Hi Chris, thank you for responding.

I'm preffering the socket plug idea. I've attached another pic showing the dims, could you please advise the plug I will need please?

Many thanks

 

[CBW]

Sorry that’s only the outside diameter of the grey boss coupling, and doesn’t mean much. The size is either 36mm or 43mm.

 

[gdallas]

Ah sorry, it looked like there was already a cap on it, about 2 or 3mm thick, but right to the edge of my measurement. I presumed what I thought was the cap already had a hole cut in it. So, the hole that white pipe is in, is actually where the plug goes? If I just use a mallet and bash upwards will that white pipe come out fairly easily do you think?

 

[terryplumb]

What you have is solvent welded together.The white pipe is solvent welded into the grey boss adaptor,in turn solvent welded into the Boss.
Bashing it is not an option.
How far below the floor is the joint where white pipe enters grey boss adaptor ?

 

[gdallas]

There is 7.5cm from the grey bit to the underside of my floor

 

[terryplumb]

You will need to cut off the white pipe ,leaving a 25mm stub of white pipe. Then clean the pipe stub outer diameter of any irregularities ,if need be. Then fit a McAlpine compression blanking plug...see Screwfix code 96079 if pipe is 40 mm or if 32 mm code 73053

 

[gdallas]

You will need to cut off the white pipe ,leaving a 25mm stub of white pipe. Then clean the pipe stub outer diameter of any irregularities ,if need be. Then fit a McAlpine compression blanking plug...see Screwfix code 96079 if pipe is 40 mm or if 32 mm code 73053

Thanks mate. But pipe seems to be 36mm?

 

[terryplumb]

Was it a sink connected or a bathroom basin ? Use the 32 mm blanking plug.

 

[CBW]

36mm = 1” and 1/4 (32mm Internal diameter irrc).

 

[gdallas]

Thank you both. I've ordered the MCALPINE S23U. I just hope I can still fit in supports for the floor to screw onto too. It's going to be tight. Could maybe twist the soil pipe once the caius installed I guess. Wish me luck!