Plumbing sink

kevinsmbuk · 26 Sep 2022

Hi I have a blanco sublime 1.5 bowl sink. The baskets have a sort of push fit connection underneath. Using the pipework they supplied to looks like the pic below. Not ideal really but there isn't enough space to put it at the back. What else would I need in order to get it plumbed up and can I put the ubemd straight on the black waste connection (with green bag over it)

Burnerman · 26 Sep 2022

For sure, you'll need a 'U' trap before connecting into the existing black pipe.....consider fitting one where the existing white outlet is, and then heading down towards the black pipe.
John

Madrab · 26 Sep 2022

Why is it Blanco always seem to insist in coming up with the most awkward and pointlessly complicated waste systems known to man.

I'll be honest, ditch that and replace with a proper 1 1/2 bowl sink waste/trap system and change the basket wastes to a conventional 1 1/2" threaded outlets, so much simpler, easy and tidy to fit. Then it'll be easy to connect that down to that waste outflow.

kevinsmbuk · 26 Sep 2022

Madrab said:
Why is it Blanco always seem to insist in coming up with the most awkward and pointlessly complicated waste systems known to man.

I'll be honest, ditch that and replace with a proper 1 1/2 bowl sink waste/trap system and change the basket wastes to a conventional 1 1/2" threaded outlets, so much simpler, easy and tidy to fit. Then it'll be easy to connect that down to that waste outflow.

Cheers for the advice the only issue I have is it has quite stylish drainer plugs, so if we ditch all that well lose that too won't we? Also rightly or wrongly I have connected the dishwasher waste to the overflow on the .5 bowel basket.

Using what we have what's the tidiest way of plumbing it in from there?

denso13 · 26 Sep 2022

If you've used up all the bits that came with it them something like this, https://www.toolstation.com/mcalpine-p-trap/p74016, should fit onto the threads you have showing. A couple of bends and some pipe should finish the job.

terryplumb · 26 Sep 2022

Remove the dishwasher waste pipe , and fit the overflow pipe work as it should be. Fit a trap with an integral appliance waste inlet to connect it to. Then a couple of elbows and Length of pipe to connect up to the pipe that goes out the wall.

Hugh Jaleak · 26 Sep 2022

Dishwasher waste hose needs to rise up to almost level with the underside of the sink before dropping to connect to the spigot on the trap. With the setup you have there, dirty water from the sink could run back down the drain hose into the Dishwasher, possibly causing odour/dirty water issues in the Dishwasher, and if the Manufacturers want to be funny, invalidate any warranty claim due to incorrect installation.

kevinsmbuk · 26 Sep 2022

terryplumb said:
Remove the dishwasher waste pipe , and fit the overflow pipe work as it should be. Fit a trap with an integral appliance waste inlet to connect it to. Then a couple of elbows and Length of pipe to connect up to the pipe that goes out the wall.

The overflow is properly connected on the full size sink, the the dishwasher waste is connected to the half bowl which doesn't have an overflow.

kevinsmbuk · 26 Sep 2022

Hugh Jaleak said:
Dishwasher waste hose needs to rise up to almost level with the underside of the sink before dropping to connect to the spigot on the trap. With the setup you have there, dirty water from the sink could run back down the drain hose into the Dishwasher, possibly causing odour/dirty water issues in the Dishwasher, and if the Manufacturers want to be funny, invalidate any warranty claim due to incorrect installation.

That's a fair point. In the end I connected it this way, hopefully that's ok?

terryplumb · 26 Sep 2022

With that set up the dishwasher is likely to end up with waste water/ bits of food etc going down into it.

terryplumb · 26 Sep 2022

kevinsmbuk said:
The overflow is properly connected on the full size sink, the the dishwasher waste is connected to the half bowl which doesn't have an overflow.

Ok ,that's not visible in your first pic.
See my previous post.

Hugh Jaleak · 26 Sep 2022

kevinsmbuk said:
That's a fair point. In the end I connected it this way, hopefully that's ok?

Afraid it's not the way I (or I suspect many of the Pro's on here) would have done it, but if it works, it's a means to an end. Dishwasher hose still needs sorting out though, it needs to go right up, then drop the last section to the drain point.

kevinsmbuk · 26 Sep 2022

Hugh Jaleak said:
Afraid it's not the way I (or I suspect many of the Pro's on here) would have done it, but if it works, it's a means to an end. Dishwasher hose still needs sorting out though, it needs to go right up, then drop the last section to the drain point.

OK I guess it gets us up and running for the moment, the issue with that is there is no drain connection for the dishwasher. So I need to add one.

Would this be OK to add inline with the pipework, might have to be before the trap? https://www.screwfix.com/p/mcalpine...mnhI2aKL0tzzfqkB6iRoCoJwQAvD_BwE&gclsrc=aw.ds

Madrab · 26 Sep 2022

Oh my ... well it'll all work I guess ... as suggested though, it's definitely a bit of a fudge

that appliance adapter won't fit, it's designed to be connected to the bottom of a standard threaded waste with a trap below it.

You say you want to keep the strainers as they are quite stylish, you can get lots of very bespoke sink basket wastes and strainers these days that have the standard 11/2" screw fitting. Post a pic of the sink waste.

If you want to keep all that then get rid of the flexi pipe, use rigid pipe and add a horizontal section right, over to where the outflow pipe is, then a tee with the spigot below in the top leg, then on the downward leg fit a little piece of pipe then the trap then down to the level of the outflow and then elbow back into the outlet.

Hugh Jaleak · 26 Sep 2022

Madrab's beaten me, but personally, I'd ditch the Waste Valve, fit a conventional appliance trap on the outlet, then a couple of bends to join onto the outlet pipe. Gets your Dishwasher connected, and less likelihood of issues down the line.

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Plumbing sink

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