Clay soil pipe - need to add waste, options?

[mentalmike]

I am going to replace our downstairs toilet as it is quite old. When looking closer I noticed that the waste from the toilet goes into a clay pipe that is above the floor. I also want to add a sink - there currently isn't one so I need to add a connection for waste.

Here is a pic:
image here

At first I thought I was going to have to cut the clay pipe to make it lower then somehow make a hole to join the pipe but I have seen there is a join. So can I remove the top secton of clay pipe and then add one of these so I can add waste for the sink: boss pipe
Or will it be too big/small and also how would I seal it? Or have it got it all wrong and need something else all together?

Cheers for any recommendations!

 

[swidders]

Bit difficult to see exactly what to do from your picture since don't know final floor levels etc.

However, you will have little to no chance to remove the top section without shattering the join and lower section of pipe. The boss you're talking about is for plastic.

So, you could angle grind part of the top section off, and use a universal clay adaptor to join into this, and use plastic soil pipe above, which you can boss into (you'll need solvent glue for this and an appropriate hole cutter), preferably before you put it in place to prevent any damage to the clay pipe.

 

[Hugh Jaleak]

The top section of salt glazed looks to be cracked anyway, maybe as well to have top half off at least. Obtain a suitable coupling to take you from salt glazed to plastic, Wickes do this: http://www.wickes.co.uk/Soil+Vent/PVCu-Soil-To-Clay-Drain-Connector/invt/432046.

Carefully cut existing pipe above the joint and chamfer the top, the Wickes fitting will push on, alternatively McAlpine do a type similar to a pan connector which will fit inside the salt glazed:
http://www.mcalpineplumbing.com/ Click on product catalogue, drain connectors and look at a DC1.

Once in 110mm plastic, use a suitable boss connector for your sink waste, type you suggested may be fine. Any more queries, just ask!

 

[mentalmike]

thanks for the info!
Hugh Jaleak I think that is exactly what I'm after!

Just for info it isn't a crack - just a massive cob web!

If I use an angle grinder to make the cut what is the risk of cracking the pipe? Also would it be best to use a diamond disc?

 

[Richard C]

What about one of these;
http://www.h-i-e.co.uk/acatalog/McAlpine_WC-CON9V.html

but you may need an anti siphon trap on the hwb.

If I use an angle grinder to make the cut what is the risk of cracking the pipe? Also would it be best to use a diamond disc?

Similar situation but I wanted to cut the boss off flush with the floor. It should be fine as long as you don’t rush it; I used an ordinary but oversized stone cutting disc in an angle grinder. You will need to wear a mask as it will create a huge cloud of dust; & don’t forget the goggles & gloves as well!

 

[Hugh Jaleak]

I used a stone disc on mine, as Richard says go steady! Last thing you want to do is shatter or crack the salt glazed. It will be dusty, luckily I was outside. Also best to use a little suitable lubricant for pipe jointing when putting new stuff together.

 

[mentalmike]

One last thing, do I need to worry about allowing air into the system as this pipe doesn't link to the main soil pipe that the kitchen and bathroom use that vents out in the roof, it links straight to a manhole in the front garden

 

[Hugh Jaleak]

Its more what will come out of it that should be your concern! If you are planning on leaving the pipe open for any length of time its likely to smell!!!

 

[Richard C]

Not for the w/c; as long as the drain invert (the horizontal bit in the ground) doesn’t exceed 1.3m from floor level your OK as far as B Regs. are concerned. But, as I said before, you may need an anti-siphon trap on the sink to avoid pulling the trap when the loo is flushed.

 

[mentalmike]

cheers all! looks like I've have a busy weekend ahead of me!