Dishwasher drainage

lhughes · 8 Dec 2003

I need to connect a dishwasher to existing plumbing. There is already a washing machine present. I can tee off the existing taps OK, but how can I tee off the existing drainage? Do I need two traps or can I swan-neck into a single one?

breezer · 8 Dec 2003

it would be better if each has its own stand pipe.

just cut the existing waste pipe in half and put in a t piece with a vertical pipe for your new appliance

lhughes · 9 Dec 2003

Which half of the split pipe needs to have the trap? I can't see an easy way to put a T section in on the half closest to the outlet.

breezer · 9 Dec 2003

depends where is easiest. the trap is there to stop smells coming back up the pipe from outside / drain

vanita · 19 Dec 2003

hi, i have the same query as before, i have an existing drainage system with the washign machine, is it possible to connect the dishwasher using the same drainage system with a tee connector or something like that. Please advise

Thanks
vanita

masona · 20 Dec 2003

Yes but as Breezer's said "best to have it own pipe".If you have the w/machine and dishwasher on at the same time you might find the waste water will back pressure backward as it can't cope with the volume depending how your waste pipe is plumb in.

lhughes · 21 Dec 2003

In the end I found a fitting in a local hardware shop, which clamps on to the existing drainage pipe (32 or 40mm), and a cutting tool is supplied so that you cut a hole for the new pipe in exactly the right spot, and can then fit a spigot to attach the second pipe to.

As the washing machine and dishwasher won't ever be used at the same time this works fine for me.

The fitting I found is made by a Company called "Oracstar" based in Northampton, Tel 01604 702181

breezer · 21 Dec 2003

th troble with spiggots is they tend to catch "things" this acumilates over time and eventually blocks up

masona · 22 Dec 2003

Agreed,you're better off putting a t-piece connector which is design to push the water along the pipe instead of it hitting at 90 degree and going left & right.

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Dishwasher drainage

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