Bathroom types
Combined utility and WC rooms
At a glance
- The appliance waste and the WC branch can often share a route, but the WC needs its own trap and correct fall rather than a tee into a machine standpipe.
- Extraction has to cope with both damp laundry and WC use, an overrun timer fan sized for the room volume is the workable answer.
Worth checking on site
The appliance waste and the WC branch can often share a route, but the WC needs its own trap and correct fall rather than a tee into a machine standpipe.
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Your questions answered
Is a WC allowed to open into a kitchen?
It needs a ventilated lobby or an intervening space in most arrangements, the layout has to be checked before committing.
Can the washing machine and basin share a waste?
They can share a branch with the right trap arrangement, but each appliance needs its own trap seal.
What decides the layout
The appliance waste and the WC branch can often share a route, but the WC needs its own trap and correct fall rather than a tee into a machine standpipe.
Extraction has to cope with both damp laundry and WC use, an overrun timer fan sized for the room volume is the workable answer.
A door position that stops visitors seeing the laundry pile is worth more than an extra cupboard.
Add utility and wc rooms to a wider project?
Plenty of this work happens alongside other jobs in the house. Tell us the whole picture and the sequencing gets easier.
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