UK Moving Pipes Undersink for Dishwasher

[gjw123]

Hello

I am looking to install a slimline dishwasher (integrated) into a cupboard in my kitchen.

The depth of the dishwasher is 550mm and the depth of my cupboard is larger than this. The issue, however, is that the waste pipe which leads from the sink (next door cupboard) comes out quite a bit, decreasing the depth space within the cupboard I want to put the dishwasher in. This makes the actual depth of the cupboard (to the pipe) 510mm, so 40mm short for fitting the dishwasher.

There's quite a bit of space behind the pipe itself (and backboard of the cupboard). So I was wondering if anyone had any ideas on whether it would be feasible for me to push these pipes back closer to the wall?

My initial thought was to change the two 90 degree angle joints to 45 degree angles to reduce the depth it protrudes into the cupboard. If anyone was able to give feedback on this / let me know other ideas, that'd be amazing.

There is a support beam that runs between the two cupboards, hence the need to bring the pipes out a bit in the non-sink cupboard.

I've attached pictures of the pipe in the dishwasher cupboard I want to move back, and the cupboard it leads into (with the sink).

Any help would be much appreciated.

Thanks!

 

[oz-plumber]

Isn't there just a 20mm waste pipe from the dishwasher?
Can you not just bring that through the side of the cupboard into the sink waste area and connect it to a drain there on the upstream side of the trap.
Our traps have nipples that are suited to this, I almost sure you would have the same.

 

[gjw123]

Isn't there just a 20mm waste pipe from the dishwasher?
Can you not just bring that through the side of the cupboard into the sink waste area and connect it to a drain there on the upstream side of the trap.
Our traps have nipples that are suited to this, I almost sure you would have the same.

The issue is that the actual dishwasher is too deep by 4cm once it reaches the white pipes shown in the picture. Therefore, I am trying to increase the depth in that cupboard by somehow making the pipes further back towards the back wall, so the dishwasher fits without poking out!

 

[ShaunCorbs]

Tbh it’s not an easy job all the pipes have to be sunk flush in the wall

 

[gjw123]

Tbh it’s not an easy job all the pipes have to be sunk flush in the wall

What do you foresee as the issues that not make it an easy job?

I was thinking I could get 2 X 45 degrees to replace the 2 X 90 degrees joints, then under the sink make them a bit deeper too to ensure they're pushed back in line... does that seem feasible?

 

[gjw123]

I was considering a pipe like the grey one attached to this to sit more flush to the wooden support. Or perhaps two of the 45 angled white ones (shown in the pictures too) to replace the 90 degree.

 

[ShaunCorbs]

What do you foresee as the issues that not make it an easy job?

I was thinking I could get 2 X 45 degrees to replace the 2 X 90 degrees joints, then under the sink make them a bit deeper too to ensure they're pushed back in line... does that seem feasible?

Just working in kitchen cupboard and chasing in the waste without destroying the back as you will have to go into the block / brick wall 50mm

 

[gjw123]

Just working in kitchen cupboard and chasing in the waste without destroying the back as you will have to go into the block / brick wall 50mm

I think I'd only need to move back 40mm. I measured and if I can move the white pipes back that much, they will only reach the front of the wooden support beam, rather than having to go into the wall etc.

 

[ShaunCorbs]

I think I'd only need to move back 40mm. I measured and if I can move the white pipes back that much, they will only reach the front of the wooden support beam, rather than having to go into the wall etc.

Looks like it’s a clip off in the second and third picture?

 

[gjw123]

Looks like it’s a clip off in the second and third picture?

Is this the two 90 degree angle joints you're referring to that I want to push deeper into the cupboard?

 

[ShaunCorbs]

Is this the two 90 degree angle joints you're referring to that I want to push deeper into the cupboard?

Where’s the dishwasher going in the cupboard with the 90s and metal plate or the next cupboard to the right ?

 

[gjw123]

Where’s the dishwasher going in the cupboard with the 90s and metal plate or the next cupboard to the right ?

The dishwasher is going in the cupboard with the metal plate and 90s, not the undersink one. Therefore, I want to push the pipes deeper in this cupboard (appreciate the undersink cupboard pipes will have to go back too subsequently).

 

[ShaunCorbs]

The dishwasher is going in the cupboard with the metal plate and 90s, not the undersink one. Therefore, I want to push the pipes deeper in this cupboard (appreciate the undersink cupboard pipes will have to go back too subsequently).

Is it the full cupboard width the dishwasher?

 

[gjw123]

Is it the full cupboard width the dishwasher?

The dishwasher will fit width wide and height wise. Width wise, there's 10-20mm wiggle room. The only issue really is the depth of 40mm due to the protruding pipes. If they could go back (which there is room for before they get close to the wall) then it will fit! Just wondering how to go about that...

 

[Basher]

Does your chosen dishwasher have a service void at the bottom across the rear? Some do, some don't.
Just wondered if by chance your waste pipe eventually descends to floor level, whether you could run it low down?