Hi all, I'm a long time reader, first time poster. I've looked all over for a definitive answer on this but can't seem to find one.
I'm moving a washing machine from its current location near the soil stack on the ground floor to the other side of the room. The wall at the new location is separated from the wall where the soil stack is by doors, so I can't run a waste pipe all the way around and I'll have to go under the suspended wooden floor.
My question is, does anyone think it is acceptable to run a waste pipe from the new location under the floor for about 2m and then back up to join the old waste pipe that falls into the soil stack? The top of the pipe where the washing machine waste enters would be about 400mm above where the pipe would rejoin the old waste. I could optionally put a traditional trap above the floor before it goes under the floorboards, but it wouldn't be necessary and I probably won't. I'd use solvent weld joints and I reckon the trap created by this arrangement of pipes wouldn't hold more than 4kg of water in total (I'd support it at 0.5m intervals).
The new location isn't near any external drains so I can't drain it that way. The other option is to create a new falling waste under the floor over about 4m and cut into the soil stack below the floor. I have contacted the BCO and they said it would be fine for me to go ahead and make the new soil stack connection under the floor. However I'd rather not do that as it will make this connection very hard to access in the future. The long trap I'm suggesting will be accessible with only a few floorboards lifted.
I've added a diagram of the situation below. Any comments will be greatly appreciated.
View media item 14578
I'm moving a washing machine from its current location near the soil stack on the ground floor to the other side of the room. The wall at the new location is separated from the wall where the soil stack is by doors, so I can't run a waste pipe all the way around and I'll have to go under the suspended wooden floor.
My question is, does anyone think it is acceptable to run a waste pipe from the new location under the floor for about 2m and then back up to join the old waste pipe that falls into the soil stack? The top of the pipe where the washing machine waste enters would be about 400mm above where the pipe would rejoin the old waste. I could optionally put a traditional trap above the floor before it goes under the floorboards, but it wouldn't be necessary and I probably won't. I'd use solvent weld joints and I reckon the trap created by this arrangement of pipes wouldn't hold more than 4kg of water in total (I'd support it at 0.5m intervals).
The new location isn't near any external drains so I can't drain it that way. The other option is to create a new falling waste under the floor over about 4m and cut into the soil stack below the floor. I have contacted the BCO and they said it would be fine for me to go ahead and make the new soil stack connection under the floor. However I'd rather not do that as it will make this connection very hard to access in the future. The long trap I'm suggesting will be accessible with only a few floorboards lifted.
I've added a diagram of the situation below. Any comments will be greatly appreciated.
View media item 14578
