Is this undermount sink too big?

[SolRobinson]

Hi, we have a 800 sink unit (575 depth including a 65mm service void), which is double door, so requires a centre post. So I intend to leave a 25mm gap from the front of the sink, to allow room for a slightly altered centre post to screw into. However, it means the sink is almost flush with the back of unit. The sink is 800x440. There’s roughly a 27mm to the back panel of the unit or 112mm to the wall.

I’m think I’ll be fine as long as I cut a good chunk from the back panel/support and just have the tap cut out over the service void with the flexis sticking through, into the back of the unit. My only worry is cutting into that back support, considering I’ve already cut majority of the front support out. Am I overthinking it?

Just to add:
- We’re thinking worktops will be 22mm quartz
- I’ll be adding a 18mm marine ply “shelf” flush with the bottom of the sink as the support for the sink.
- I also thought instead of cutting a hole out of the rear support, alter the back panel and lower the rear support (which is at the top of the unit) to somewhere halfway down the unit, which keeps the support and also gives me access to that service void, for the tap. I feel this could be a better solution but then my idea for the 18mm ply shelf would go out the window

Thanks

 

[foxhole]

Unit is a little undersized for sink , looks like you will struggle to fit sink overflow without removing back panel, sink will need to attach to counter top before install as there will be very limited access for taps once top is on.You will also need to remove both side panels at top to allow sink to fit flush.

 

[SolRobinson]

Unit is a little undersized for sink , looks like you will struggle to fit sink overflow without removing back panel, sink will need to attach to counter top before install as there will be very limited access for taps once top is on.You will also need to remove both side panels at top to allow sink to fit flush.

I'm not too worried about the plumbing side of things, there's a good YouTube video, which the guy was in the same situation as me, but with a smaller unit/sink

As you can see, he alters his unit, as I intend to do, cutting a notch from the top of the unit, to allow for the sink to sit lower (which will then be raised up by the support to sit flush) and he has halved his back panel and lowered the rear support to allow for the plumbing.

The only thing is, in this video, he decides to scrap this idea and go for a smaller sink due to his concers for future maintenance in that, if he opted for the bigger sink, there would be no easy way of removing the sink in future. My thoughts are that, I should never really need to get this sink out ever again, sure sinks can get scratched/dented, but as long as it doesn't leak through the bowl itself, I see no need to ever replace the sink. And, even with a smaller sink, the sink is still stuck to the bottom of the quartz, still making it hell of a faff to remove a smaller one.

I see no issues with my plan, but this is also my first time fitting a kitchen, so wanted to ensure no one had better ideas or any concerns with this idea.

 

[foxhole]

So how do you plan to connect the taps with no access to the rear of the sink once the top is installed?

 

[SolRobinson]

So how do you plan to connect the taps with no access to the rear of the sink once the top is installed?

The tap will have flexi connectors, drops them through the tap cut out leaving the flexis dangling and then connect on.

The overflow is in 2 parts, I’ll connect in 1 part of the overflow, before the sink is fixed in and then connect onto it with the second part once fit.

 

[foxhole]

Yes but do you have enough room to secure taps to top , I didn’t had to connect taps to top before install .

 

[SolRobinson]

Yes but do you have enough room to secure taps to top , I didn’t had to connect taps to top before install .

It’ll be roughly 100mm from wall to the sink cut out, so I would think so. I did a quick sketchup so I could visualise it better, the circle represents the tap, a 54mm base of the tap and 32mm thread sticking through the worktops. As long as I can get my hand up the back with a ratchet or even one of those tappex kits (worst case) I'm sure I'll be fine.

From what I've seen online, 800mm unit undermount sinks are usually 700-740x430-450. So it's not the depth that's the concern, it's simply just the width.