joining basin waste to shower waste

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now doing final runs to stack on my bathroom refit - it will be far easier to join my basin waste into my shower waste (2 " pipe) - have an anti - vac trap for the basin - just wondered how likely it is that this configuration could cause problems later on - any advice appreciated. I can have seperate runs to the stack but unless there is a big advantage to doing so I'd rather join them.
 
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Are you sure it is 2" :confused:

If it is 1 1/2" cut the pipe and connect in a "T" , connect the shower pipe waste straight through then use 1 1/2" to 1 1/4" reducer to connect the basin waste to it.

Personally I would use solvent weld for this
 
sorry - should have made it clearer - my shower waste is in 50mm (apart from a small length of 40mm from trap) - my basin starts in 32mm and then goes up to 40mm - this would connect to the 50mm using a T on the way back to the stack.
 
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Sounds good to me :D

Might be a bit cheaper if you can put the T in the 40mm and run the 32mm into that 2" fittings are a bit more expensive

But if you have already run the pipes then go with the 2" stuff

sounds a bit excessive to me but hey it should never block up :D
 
sorry - should have made it clearer - my shower waste is in 50mm (apart from a small length of 40mm from trap) - my basin starts in 32mm and then goes up to 40mm - this would connect to the 50mm using a T on the way back to the stack.

Sounds to me like you've got it spot on - this is how I'd do it
 
I've got the pipe and fittings already so shall go for it ! thanks for your help
 
My bath and basin share a horizontal 2" pipe running along the floor. The 1½" bath waste joins the 2" waste via a swept T.
I'm not saying it is the correct way, just how the house was built in 1978.
 

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