Do I need a trap on a dishwasher?

[dns1]

I've made a bit of a balls up when prepping the pipework for my new kitchen, I assumed that integrated dishwashers had space behind them for pipes!

Apparently I was wrong, so the standpipe type trap has had to come out.

I've bought a connector to put the dishwasher waste straight on to a 40mm 1½ BSP compression fitting, but should I still put a trap in?

Last thing I want is drain smells in my dishwasher!

 

[terryplumb]

Yes ,you need the waste water to go through a trap.
Can you connect it to a sink trap ?

 

[dns1]

Yes ,you need the waste water to go through a trap.
Can you connect it to a sink trap ?

Sink isn't immediately next to the sink

 

[terryplumb]

How far away from the sink is the appliance ?

 

[dns1]

How far away from the sink is the appliance ?

There's a 900x900 corner unit in the way...

I'm currently trying to find a shallow trap which fits under the 150mm high units...

I'm very confused as to why no-one seems to sell an appliance trap which takes a flexi hose outlet

 

[terryplumb]

Can the standpipe and trap fit behind a cupboard that's adjacent to the appliance ,to the left or right of it ?

 

[dns1]

Can the standpipe and trap fit behind a cupboard that's adjacent to the appliance ,to the left or right of it ?

Sadly not, for some reason DIY kitchens decided to leave very little utility void!

I've found a flexi hose spigot which fits on to the trap that came with the standpipe (with a little modification!) I'll see if that works!

Will it matter if there is no way for air to get in?

 

[foxhole]

Run to sink with extension on waste pipe .

 

[foxhole]

There's a 900x900 corner unit in the way...

I'm currently trying to find a shallow trap which fits under the 150mm high units...

I'm very confused as to why no-one seems to sell an appliance trap which takes a flexi hose outlet

Has to discharge at high level to avoid siphoning .

 

[foxhole]

Sadly not, for some reason DIY kitchens decided to leave very little utility void!

I've found a flexi hose spigot which fits on to the trap that came with the standpipe (with a little modification!) I'll see if that works!

Will it matter if there is no way for air to get in?

Yes needs air admittance .

 

[dns1]

Has to discharge at high level to avoid siphoning .

So this is no good?

Obviously it would have the nut on it!

 

[terryplumb]

Alter the base unit back to accommodate the standpipe/ trap combo.
Is the wall hollow ,could trap be set back ,past the plasterboard ?

 

[foxhole]

So this is no good?

Obviously it would have the nut on it!

Not at low level , can you put another waste thru wall to drain to accommodate ?

 

[dns1]

Not at low level , can you put another waste thru wall to drain to accommodate ?

Don't think so...

Just out of interest, what's the problem with the dishwasher outputting directly to the trap?

I'm a novice when it comes to the waste water side of plumbing!

 

[dns1]

Sorry to bump this thread, but is it actually possible to buy a standalone appliance trap that's not a standpipe?

Is it either that or a combination sink/appliance trap?

If I'm wasting my time with continuing to search please let me know!

And what is the purpose of this item?!

FloPlast White Compression Dishwasher & washing machine Nozzle (Dia)40mm | DIY at B&Q

This polypropylene white appliance nozzle from FloPlast is Ideal for the connection of dishwasher and washing machine hoses.

www.diy.com

What can it be connected to? It's too big to attached to any sink trap assembly I've seen!