Dishwasher Waste Length

[Charles Middleton]

Hi,

Currently in the planning stages of my new kitchen. Im planning to install a dishwasher but the only place I can relocate it is quite a distance from the current drain outlet.

Ive got a U-shaped kitchen and the dishwaster would need to be situated opposite the sink. The sink currently has the washing machine under the drainer and this plumbs easily into the waste from the sink.

The waste pipe run from the proposed dishwasher location would be around 3.5mtrs to 4mtrs. So, questions are:

- Can the dishwasher pump water out?

- Could I set up a waste pipe behind kitchen units to connect into the main waste?

- Presumably this pipe would need to have a drop on it of x amount over its distance?

- Could the dishwaster effectively 'lift' water from its drain up to the level of this pipe to allow it to then run (via gravity) to the main drain?

- Would all of my wastes (sink, washing machine, dishwasher) connect into one u-bend or is it acceptable to have more than one?

Thanks in advance,

CM.

[manatbandq]

Yes - just like a washing machine

If you have space - depends on the units.

Yes.

Probably. depends how high it ends up due to the slope of the pipe.

MBQ

[Christian McArdle]

Yes.

Yes.

Yes. It's quite shallow, though, so you should manage it, unless the sink waste exits the wall high up.

It is better to have more than one, to prevent cross contamination from blockage and overflow problems when all appliances pump out simultaneously.

I would put the U-bend and a cut down (so you can mount it high) washing machine style air break stand pipe at the dishwasher position and then plumb directly to the outlet after the pipe run, using the sink U-bend only for the washing machine. (Actually, I'd prefer a washing machine air break for that, too, but if it ain't broke don't fix it and all that).

Christian.

[Richard Conway]

Out of interest, does your kitchen have a solid or wooden floor? If it were wooden and there was a void beneath then it may be possible to run the pipe accross under the floor and then exit through the wall below floor level and then run outside as a seperate waste pipe to the drain outside.

[oli4uk]

Just a little bit of advice :

Whilst plumbing my own I noted that the dishwasher pumped out a hell of a lot faster than my washing machining. I'm talking newish (=A3250-=A3350) home units. Almost that the dishwasher would pump waste water down a downward flowing pipe. So my dishwasher is on what I can best describe as a 'closed' system. i.e. there are no flexi pipes (

) that loosely fit into larger pipes with wash traps at the foot of them (Bodge DIY)

I'd be inclined to go for it, whilst using common sense :

o Closed system o Dedicated pipe (Sink could be inc though) o Sufficient slope o Internal wash trap (with easy access ;-) o Pipe fits behind worktop cupboards and draws.

HTHs - Oliver.