Leaking bathroom basin

[Kev63]

My bathroom basin has started to leak from the slip nut, after some advice really:

Complete trap assembly i've took off basin


slip nut that is leaking:



Waste pipe and chrome basin pipe:



The problem seems to be where the chrome basin pipe connects to the slip nut on the trap. I've tried max tightening, not tightening too much and even untightening completely and trying to realign the thread better. All results still cause leaks from where the slip nut meets the chrome basin pipe however.

Is the issue due to the trap being plastic and and the pipe being chrome or is it just a faulty slip nut? I plan on going to B&Q tonight to buy a whole new trap assembly but thought the chrome to plastic thing might be an issue and/or if anyone has any suggestions on how to fix this. I don't want to buy a whole new assembly you see to have the same issue. Washer on the slip nut looks fine by the way however i can't remove this part to have a better look.

Any advice appreciated 🙂

 

[snowhead]

Are you sure it's leaking at the nut, it's not uncommon to have a leak where the waste passes thro the basin and water trickles around the thread down to the nut.


If it is the trap to waste seal, ditch the O ring and wrap PTFE tape around where the seal was.
Check the bottom of the waste where it seals to the trap to see if it's smooth

 

[TomLane]

Buy a MacAlpine basin trap. There are better quality than anything you will buy from B&Q. The rubber O ring is better & it also has a longer spigot lip that goes inside of the waste to create a better seal.

 

[Kev63]

Are you sure it's leaking at the nut, it's not uncommon to have a leak where the waste passes thro the basin and water trickles around the thread down to the nut.


If it is the trap to waste seal, ditch the O ring and wrap PTFE tape around where the seal was.
Check the bottom of the waste where it seals to the trap to see if it's smooth

Nothing to do with the waste pipe or waste seal mate. I've watched it and wrapped each part with kitchen towl and its the slip nut that connects the sink to the trap that gets wet and starts leaking. Obviously the trap has to fill somewhat but after the tap has been running for awhile, leaking occurs. The images I uploaded probably don't help as they seem to be rotated the incorrect way.

It occured to me it may be due to the chrome sink pipe and the slip nut being plastic. Maybe it just doesn't have a great seal being 2 different materials. Would PTFE tape help here - From my reading online it seems that it isn't need on plastic parts, however this is half plastic half chrome i guess.

 

[Kev63]

Buy a MacAlpine basin trap. There are better quality than anything you will buy from B&Q. The rubber O ring is better & it also has a longer spigot lip that goes inside of the waste to create a better seal.

Waste seal isn't an issue here mate, it's the seal connecting the trap to the sink. Where can I buy these parts though if they are superior? Problem is i have no idea what size my part is so i was planning to take it to B&Q and just replace it like for like with a similar part. It's just inspecting of my part however it looks totally fine so thought id get advice here before purchasing a part I may not have too. To me, my current part looks new and the bathroom suite is fairly new too (under a year old).

 

[TomLane]

Screwfix sell them.

Who installed the bathroom? Did they not provide 12month warranty?

 

[Kev63]

Screwfix sell them.

Who installed the bathroom? Did they not provide 12month warranty?

Bought the house renovated, guy was a handy man so presumed he's done it himself. Bathroom seen no heavy use since so probably never came apparent. Not a massive issue anyway and im hoping its an easy fix.

 

[stevetheplumber]

Its possibly the chrome pipe is a fraction smaller than the trap was designed for there are some over sized rubbers for this but usually a good wrapping with ptfe tape will work

 

[Kev63]

Its possibly the chrome pipe is a fraction smaller than the trap was designed for there are some over sized rubbers for this but usually a good wrapping with ptfe tape will work

Thanks mate. Will see if i can find some at the local b&q and hopefuly resolves the issue.

 

[jtsplumbing]

Why bother getting more B&Q tat, just go to local plumbers merchant and buy a decent McAlpine trap, cant believe how much time people waste running around trying to save a few pence, you have come on here asking for advise and still want to buy cheep bits, so why bother asking if you are not going to listen ,

 

[glenno1]

The cheapest remedy may be to change the sealing washers

 

[Kev63]

The cheapest remedy may be to change the sealing washers

I cant seem to get the washer off the slip nut mate, its like its built in. Am i missing one? I noticed on the slip nut for the waste pipe there were 2 loose washers (one black and one nude) but not of the sort for the sink hole to trap.

 

[SimonG]

McAlpine or Wirquin trap, job sorted, as posted earlier.

 

[Kev63]

McAlpine Antisyphon Bottle Trap 32mm White | NoLinkingToThis

McAlpine Antisyphon Bottle Trap 40mm White | NoLinkingToThis

Only 2 i could find that look similar to what I have. Now i need to figure out what size i need... will try my local screwfix tommorow.

 

[ashwilson]

McAlpine Antisyphon Bottle Trap 32mm White | NoLinkingToThis

McAlpine Antisyphon Bottle Trap 40mm White | NoLinkingToThis

Only 2 i could find that look similar to what I have. Now i need to figure out what size i need... will try my local screwfix tommorow.

32mm....

 

[Kev63]

Went to screwfix and the PTFE was so cheap the guy recommended I used that first. I took the trap with me and he said he can't see that causing issues. I've applied the PTFE tape and the leaking seemed to stop until today.

Now that the chrome pipe is covered with white tape, i used some coloured dye to see where the leak was coming from:



It now looks like the leak is coming from the big black rubber seal going off the blue water running pattern.

Easy way to fix this chaps? I can't seem to loosen / tighten this part by hand.

 

[Dotty]

Clean the ptfe off.

Fit one of these.

11/4" Basin Waste Rubber Seal Basin Mate Washer on eBay!

If the guy at Screwfix knew what he was doing he wouldn't be behind the counter.......

 

[Koogatubac]

Jesus... Stop mucking around with ptfe, cheap tat and buy a McAlpine 1 1/4 Bottle trap. You'll know the difference straight away in fitting it (only cost u less than £10) if you dont cross thread it it will be fixed first time!!

 

[Koogatubac]

Btw he meant the PTFE on the washer not the waste outlet lol .... Diy'ers...

 

[Kyle87]

If this is still going on.......get a plumber in!!