If the waste is metal, then you can slice the nut off with a hacksaw and take it off in pieces in you need to
There is no nut left on. Everything that could hold it in place physically has been removed except for the putty which isn't even visible and is a very thin layer but a fiendishly tough adhesive. I was hoping there was something that we could soak the joint in that would penetrate and 'eat' the putty away.
The hot water and the vinegar were used separately but neither had any effect.
Are you trying to get the trap off, or the waste out?
Trying to get the basket trap base detached from the sink in order to replace it with a new one. Is that what you call the drain. It's the bit with four holes around it which would normally be a plug hole, but the basket sat in there with a prong clicking it into place when the water needed to be kept in the sink. The old one corroded below the drain hole, where it attached to the drain pipe below the sink. From above the sink it looked ok but below it was rusted through and leaky. Now the pliers have mangled the cage bit and the basket can't fit in because of that. I need to remove the drain bit and it just seems almost seemlessly welded into place. It just seems like metal to metal but there must be something between gluing it together firmly.
Ok, the waste.
It may be stuck in with putty - this sets hard over time.
Try putting 2 screwdrivers through the slots of the waste and twisting them, this will twist the waste and usually cracks the hold
It has had a long time to set. About 25 years. Is that likely to make it unsaveable?
It would not be the first time I had to use a hammer and sharp screwdriver to get one out
If it is a stainless steel inset sink it will probably be strong enough to take it
It is a stainless steel inset sink (currently not inset anymore) and I think it may be our only option but I didn't want to tackle it that way if there was a less aggressive option as I don't want to right the whole unit off by damaging the sink. It's a great sink with deep bowls and I have looked long and hard for a replacement without finding one - I currently have a second hand one balanced over a base unit and I am well and truly ready to get back to my proper sink if it is at all possible! If I turn it upside down, support the sink around the hole and then give the protruding waste threads a sharp tap with a mallet, could that do it? Or do I have to work a screwdriver between the waste and the cup it sits in below the hole in the sink?
The problem is old style plumbing, boss white and putty was made to last forever.
You could try white spirits as that is good for cleaning putty of before it sets
You could turn it over a give it a knock with a mallet and support the waste hole with a roll of sellotape or similar
Try giving a twist to weaken the joint first
Do you think it may have been put in using this 'boss white'? I will try that, thanks. We suspended the sink above a bowl of vinegar last time so we will try that with white spirits and see what happens. Then try the mallet. We bust the pliers with trying to twist it and it didn't budge a millimetre so will have to try the white spirits before repeating that. It really is rock solid.
You may need a wrench or something stronger, try to loosen one way and then the other
Will try that Andrew. Thanks.
No problem - good luck
I'll let you know if it works or not - believe it or not this is a 5 year problem and I would really love to sort it out.
Ok, just come back if you need me again