Sink relocation - Pipework for a new kitchen sink position

[edunt]

Replacing our kitchen involves moving the sink to the other end of the room - at the same time installing a waste disposal unit.

The original waste pipe goes out of wall behind old sink and down to one side (about 4 feet I guess) into and above a gully grate.

The new sink waste position will be about 12 feet from the same gully. I think that is too long a pipe run, if I understand what I have read about the topic - true?

So what is the solution? The wastes (old and new) are on the same outside wall. Is there something I can do with the 40mm pipework? or should I lay a new gully near the new sink and pipe that to the old gully (still used by bathroom and drainpipe from gutter)? The second seems a bit drastic just to get rid of sink waste (and dishwasher).

On the subject of waste disposal units - they have to be discharged below the gully grate - is there a better way of doing that other than cutting a hole in the grate? Is there some special fitting?

Thanks

[lutonlagerlout]

you can run a 40mm pipe 12 ft no problem
obviously its better to move the gully but this is loads more expensive
and yes you can cut a hole in a grate,with a hacksaw or stihl saw
more of a notch than a hole
cheers LLL

[edunt]

Ok - thanks for that. Long pipe it is then.

[matt h]

can get drain covers with spigot fitted to deal with waste disposal unit

[edunt]

Hi Matt. Where can I get one please? and what does it look like?

I might add the current gulley is 8-9 inches square but the grate is round - as is the pipe beneath it.