New waste into old soil pipe

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In preparation for a new kitchen layout I have plumbed a washing machine standpipe into the soil stack where the sink used to be attached (Not been used since we moved in and put a new kitchen in)

I am not 100% confident about the fit of the pipe into the old fitting, do I need a new gasket/washer?

For now the standpipe is temporary, but eventually the sink will be plumbed back into the soil pipe and I think I will need something a bit more robust.

P1040177.JPG P1040175.JPG
 
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Iirc these are bolt clamped into position, yours looks like there's no bolts, so you may end up having to cut that section out.
 
@The Novice (In the first picture) I have removed the bolts and clamp to show the gasket already fitted to the soil pipe. The second picture shows what I have done.

I have used all the original fittings, but the new pipe doesn't feel "snug"
 
Sorry 2nd photo not brill on phone. I'm not sure if gaskets are available, someone else might be able to answer.
 
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Looks like you've used access port. Did you remove the bolted on access plate?
 
Sorry 2nd photo not brill on phone. I'm not sure if gaskets are available, someone else might be able to answer.
That's alright, the second photo is not very good anyway, my camera's not the best in low light, and it was to show what I had done.

Looks like you've used access port. Did you remove the bolted on access plate?
When you say 'access plate' do you mean just a blanking plate?

When we moved in there was a sink plumbed into the soil pipe at that position (been there since the house was built in the 70's)
When we re-did the kitchen I cut the sink waste pipe short and plugged the end of the pipe.

Now we are re-doing the kitchen I want to reuse the connection to the soil pipe.

So I removed the stub of pipe left over and shoved a new pipe in, but it does not seem very secure (difference between copper/plastic and imperial/metric I assume)
 
Here is a clearer close up photo of new pipe into old hole.

P1040180.JPG



This is a photo of how the bath/basin is connected to the soil pipe. I believe that it is 100% original, the only thing that has changed is the spider webs o_O:eek:

P1040179.JPG
 
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Just a quick bump.

Does anyone know where I can get a new gasket from?

All my searches either come up with bosses or joining soil pipe to soil pipe
 
You have used an old cast access boss, it used to hold either a cast, copper or lead waste pipe which was slightly larger OD and therefore a tighter fit on the seal.

All you need to do is use a high quality silicone adhesive (wet grab/seriously strong/CT1), take the clamping plate off, take the pipe out, clean/wire brush the whole area around the pipe/rubber seal where it enters the boss, refit the waste pipe and run a fillet of silicone adhesive around the pipe and then re-clamp. Once it's set the adhesive will become a rubber gasket of it's own.

Once in there then don't disturb it in the future or you will have to redo it, just cut the pipe and solvent weld any new waste onto it.
 
It looks like you have used push fit (PP) pipe by the gap you have round the joint, use solvent weld (ABS) pipe which is just slightly larger in diameter than the 1 1/2" copper you removed, no need to bodge it with silicone.
 
@Madrab Thanks for that, I was hoping the solution wouldn't involve silicone!

For now it's not leaking, but when I get the sink permanently plumbed in I will follow your suggestion.

@JimCrow Thanks for that, the sink waste will probably be solvent welded in, I will get some and have a try, but I thought both types of pipe were 40mm?
 
@Madrab Thanks for that, I was hoping the solution wouldn't involve silicone!
Don't forget all that all new rubber seals are invariably moulded silicone these days. That will be, in effect, what you are doing. Silicone does have it's place in modern plumbing, as long as it is used properly and in the right amounts, just don't use copious amounts everywhere. Just use enough with the clamping plate and old seal as the former to augment the seal and then it isn't a bodge. A bodge would be to smear loads everywhere coating everything, you don't need to do that.

Silicone adhesive isn't like silicone sealant, it cures into much firmer/tougher rubber than sealant and therefore is a more permanent fix.
 
@JimCrow Thanks for that, earlier all I did was check the Wickes website, a quick google (something I should have done earlier) confirms what you said. (y)
 

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