If you aren't going to attach the waste from white goods to the sink waste, but give them their own waste pipe, what's the proper way of doing it?
I have a pipe at my disposal than I can drop a dishwasher waste into, it's vertical inside, goes through the wall to outside (obvs) and drops into the drain, I feel like it should have some sort of trap? Or seal?
It should have a trap / u-bend inside.
If it goes outside into a gulley it should terminate below the grille of the gulley but above the waterline in the gulley trap.
Owain
Tarps are mainly there to stop smells coming up from directly connected waste pipework. As yours drops into a gully there is an air gap and the gully might be trapped from the drains as well.
Of course without a trap you may find that there is a force 10 gale of cold outside air coming in if it's windy from a particular direction.
Yes, there is a trap between the gully and the drain.
Although a bit of fresh air round the back is no bad thing. I'm more bothered about things crawling up it, we have a bit of a slug problem (if you go out at night under certain conditions the lawn is bloody carpeted with them!)
Though whether they'd come up that pipe is another thing, it would require some acrobatics.
In the old days it was common to have a brick and cement gulley with a metal "grill" into the ceramic unit with a trap (like an upside down weir).
R D S explained :
Vertical pipe should at the least go down into some sort of trap at the bottom. To stop drafts and prevent smells coming in.
Can you fit one of these to the top of your waste pipe?
My one for the washing machine does not have one, just poor down something suitable every so often. Brian
R D S snipped-for-privacy@yahoo.com wrote
Depends on the detail of the plumbing where it is.
Yes, to stop smells coming up that pipe from the drain.
That will work fine too.
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