Kitchen waste outlet height

[Dazzathedrummer]

Hi,

I'm just fitting a new sink.
As you can see in the picture, the fittings (as it's a double sink) give me an outlet that is quite a bit lower than the outlet in the wall...

Bearing in mind that the old fittings we're that much higher (maybe three inches) - will this be a problem? ...can I get different fittings to give me a higher outlet or do I need to lower the outlet pipe through the wall?

 

[Dan Robinson]

You need to lower the outlet in the wall.

 

[HERTS P&D]

Or raise the sink?

Andy

 

[oldbuffer]

1. Assuming the sink is at finished height you'll have to lower the outlet through the wall.
2. Have a look at the McAlpine Sk2. By cutting the SK2 pipes from the sink waste down a bit you could reduce the amount by which the wall outlet has to be lowered.

 

[dilalio]

Can't see from photo... is it the dreaded lead waste pipe? If so, you'll still have to lower it and get outside and modify the external pipework

Hopefully it's not a 4th floor flat in the middle of a city!

 

[Doggit]

As the initial bend from the sinks, are already lower than the original outlet, you've got to drill a new outlet, but as that pipework is wasting a hell of a lot of space in the cupboard, I'd be inclined to look for a neater setup first. Have a look in B&Q etc for alternative waste packs, and then drill the wall.

 

[Dazzathedrummer]

As the initial bend from the sinks, are already lower than the original outlet, you've got to drill a new outlet, but as that pipework is wasting a hell of a lot of space in the cupboard, I'd be inclined to look for a neater setup first. Have a look in B&Q etc for alternative waste packs, and then drill the wall.

Yes, you are right - its a hell of a contraption!

I've got it connected up now and it does work ok - drainage isn't in any way slow and I'm not getting any problems with the dishwasher... but the waste is sitting roughly half-way up the two downward pipes (I have taken about an inch off the bottom of these).
I got a suggestion on another forum that I could go for a shallower trap on each sink which would raise the output to the outlet - I think this would be a neater setup.

 

[Ian H]

That won't work for long. Your washing machine pipe will be full of water forever.

You would be better off fitting P traps to each outlet and joining them with a T. You will probably still have to lower the outlet though. Get a core bit from Toolstation.

 

[Doggit]

The water sitting in the pipes, and the washing machine hose will start to stink soon, and that'll make the washing machine smell.

 

[Dan Robinson]

Perhaps the OP needs telling a 6th time

 

[Doggit]

Actually, I think he will.

 

[dilalio]

Altogether now... "where does schit travel?".......................................

 

[HERTS P&D]

UP HILL!..........................................No, I mean down hill!

Andy

 

[Phill Peck]

Get rid of all that ****.

Put 2 1 1/2 traps on the bottom of the wastes and join the together.

 

[copea]

Pretty soon, waste water is going to start overflowing out of the washing machine if you leave it like that.
Waste water works on gravity.