Plumbing help – Broken bathroom sink waste

Dear Plumbers, I need your help please, my bathroom sink waste broke and needs replacing but I don’t know how to remove it.

Looking at “how to” videos on YouTube looks like they all come with a big nut on the bottom to tighten up and compress the whole assembly together and form a seal around the sink.

But my waste doesn’t appear to be attached with a nut and doesn’t appear to have any thingy that a tool could get purchase and tighten / loosen it off?

I need to get another pair of molegrips as my current ones don’t fit. But can I just twist it off with molegrips? I’ve tried turning with my hand but I can’t shift it.

photos are here:
https://1drv.ms/u/s!AlKbY_RbX4RZglK0WEM2qIQhhCDW?e=FDXnc5

I have never seen a fitting like that but surely it must have in internal screw fitting (a bit like a sex bolt)?

I’d drill a hole in whats left and use a screwdriver in it as a lever. I think you would have had purchase if you had not ripped the rest off.

Maybe leave the spinach for a bit?

looks like some crafty compression/interferance fit.
If you can get a hacksaw blade in the hole, you could cut a slot in the “inner” section of the fitting, and give it room to close up, away from the outer collar.

like putting a split in a crown race (who’s making non split crown races these days. what a pain in the arse)

looks like some crafty compression/interferance fit.

I wonder if the sink came with the waste pre-glued in. Is that discoloration around it old silicone/glue or just mank? Either way, maybe cut away at, and rip out if possible, the rubber seal so you can get an idea of what’s behind it.

If its glued then that might be tricky to do in situ. New sink?

The bit that’s left in is the top of the pop-up waste section that’s come off (the bit with the rod going in). That whole section would normally act as a backnut, so in theory that bit left in should unscrew. You just need to get some purchase on it. Maybe hacksaw a slot in one side then wedge a screwdriver in and gently persuade it with a hammer.

I didn’t rip it off it broke. Plug was in the down position, when I released the plug to drain the water it gave way fully dumping water on the floor.

Preassembled / glued in fitting was what I was thinking too.

Thanks for the suggestions I’ll give them a go. Its borked anyways so destructive removal doesn’t matter. Fingers crossed its not glued in otherwise I think that’s gonna be a new sink job.

That looks exactly like one I replaced a few months ago – I think it’s a screw fitting that has corroded / stuck together.

Unfortunately I can’t remember how I got it apart – but it’s not a new sink time.

BASIN FFFS

Basins

Sinks

BASIN FFFS

You can’t wash your face in a buffalo?

Looks like something snapped off that fitting eg a threaded section.

I’d just replace the plug unit with a new one and fit a new U bend to that.

^ As the old joke goes, that would be correct 😉

I think the remainder of the broken bit below the black seal will unscrew from the top section if your lucky. Get a screwdriver in and pull the seal off, you should see a threaded section on the top/inner section.

Strap wrench might be a good investment.

Seen this one loads of times!

You need to get a set of grips on to the cylindrical part above where it has broken and it should unscrew off. Then the top part should push up through the basin. If the whole assembly spins when trying to remove the flange you may need to hold the top part from above while unscrewing the flange off. You can jam something in the overflow slots from above to hold it better if it’s difficult to do by hand, ie a big flat screwdriver. If you can’t hold it tight enough to unscrew then you may have to hacksaw it off. Cut through the black seal above the flange with a hacksaw , and then keep going to get through the top part. It’s brass so should be easy enough once you get started.

Thank you all for the help, it was very much appreciated. Yes the bit remaining at the bottom off the sink does just screw in /out.

Because of how close to the wall the sink is I couldn’t get the grips in very well to twist it off but it was kinda moving a fraction of a degree just really slowly. In in the end I got the dremel out and just cut it off. It was glued in with lots of silicone sealant and was a bugger to get out.

I’ve managed to remove and clean up the old silicone so have a nice clean surface again for the new waste to go in. Going to give that a go this evening once I’m done with work. Pump track mess about will have to wait.

But now I’m wondering if I can get the bottom nut tight enough with the limited room and lack of access for tools. Is hand tight going to be OK? I think I may have to look into removing the whole sink to get to the waste properly.

Sink appears to be held up by the pedestal and then a couple screws keep it held against the wall. The copper pipes for the taps just disappear into the sink / tap so no idea how they are connected. Time to get back onto YouTube. I’m hoping it’s not too tedious.

Just loosen the screws out a bit and lift the front of the basin up, slide out the pedestal very gently, but not all the way out, so the basin can still rest on the pedestal while you work on the waste. The pedestal may be screwed down to the floor, remove the screws first if it is.
Waste only needs a little nip up after hand tightening. I think the reason the old waste snapped where it did was due to overtightening.

Thanks @supremebean, that gave me proper access to get the job done.

Thank you all who helped, job is completed and I have a working bathroom sink again!