TriciB
Sep 19, 2011, 03:16 AM
We are putting a shower room into our attic with toilet, sink and shower.
Due to height restrictions in the attic the shower tray can't be raised enough to have the shower waste pipe go out the side wall so it needs to go down through the house and out the back. Our builder then recommends that we have the toilet waste go down the same route through the house so he can feed the shower waste pipe into it.
We didn't like the sound of having the toilet waste go through the house so suggested having it go out the side of the house (which is possible). However, he says that this means that the shower waste pipe will have to be very long (because it will have to go all the way down through the house and out the back before it meets the main drain) and this can cause the water in the p-trap to be sucked out which means we will have smells of the drain coming up to the shower room.
I was wondering is this the case - if the shower waste pipe is very long (because it doesn't join up to the toilet waste soon enough) is there the risk that the water might be sucked out of the p-trap creating smells in the shower room?
Many thanks for any help.
Due to height restrictions in the attic the shower tray can't be raised enough to have the shower waste pipe go out the side wall so it needs to go down through the house and out the back. Our builder then recommends that we have the toilet waste go down the same route through the house so he can feed the shower waste pipe into it.
We didn't like the sound of having the toilet waste go through the house so suggested having it go out the side of the house (which is possible). However, he says that this means that the shower waste pipe will have to be very long (because it will have to go all the way down through the house and out the back before it meets the main drain) and this can cause the water in the p-trap to be sucked out which means we will have smells of the drain coming up to the shower room.
I was wondering is this the case - if the shower waste pipe is very long (because it doesn't join up to the toilet waste soon enough) is there the risk that the water might be sucked out of the p-trap creating smells in the shower room?
Many thanks for any help.