External Waste Pipe leak for the kitchen sink. Opinions on possible solution / tips / advice.

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MissBuilding1975

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Hi Guys,

Wondered if you could all help me please regarding my kitchen sinks external weld waste pipe.

Six years ago had an extension done on the home, though in the last 2 years my kitchens external drain waste pipe has been leaking a little from the outside on the wall. Could anyone advise me on the pictures based below, please?

From what I understand of it, the waste drain pipe which connects to the trap comes outside which is then connected to another drain pipe via a compression slip nut in between both pipes tight against the wall. To my understanding, this does not seem to be doing the job as this is where the leak is.

Possible Solution below

I have a suggestion in mind to fix this, which would be to buy a 45 degree or 90-degree bend offset pipe, solvent weld this between the drain pipe which connects to the trap and comes out the wall, then connect (solvent weld) the other side to a new 40mm drain pipe. Using 40mm wall clips to keep the pipe in place. Of course, if the internal/external drain pipe which connects the trap just falls short off from coming outside the exterior wall a little, I could just attach straight coupling connector to it to extend it a little, right? . Regarding the brickwork ill chisel of some of the grey mortar first and at the end of the job, patch this up with new mortar (Red dye) to match the bricks a little.

_____

Please do let me know your thoughts on my solution above please guys, or if you have any suggestions or better solutions/tips then please do let me know. Sadly, I am short of funds atm to get this fixed so I want to try and do this myself.

Thanks to all who reply in advance pictures are below.


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Replace it with solvent weld pipework, clipped to wall as required. I am not sure from the pictures what the existing pipe is, as only certain types of plastic will solvent weld.

To DIY you should be able to get required parts from Screwfix or a DIY 'shed' for under £20. Measure and assemble dry, to ensure you're happy with the setup before gluing, it aint coming apart afterwards!
 
+1 for the solvent weld.....the other stuff deteriorates in U.V light and becomes egg shell thin after a few years :eek:
Give us a pic of the drain / Bottle trap inside the cupboard - hopefully it's an easy job.
John :)
 
The section of pipe that comes thru the wall is just a bit too short to fully engage ,and seal properly ,into the compression elbow. All you need is a new elbow and a few metres of pipe. Disconnect at the sink trap and push the existing pipe to outside. Measure it ,add two inch's ,and cut a new section of pipe.push thru wall to trap ,connect to trap ,making sure the rubber seal is fitted the correct way around.fit your new elbow outside to both pipes and support with brackets.
 
Thanks so much @Hugh Jaleak @terryplumb @Burnerman for your response, so all in all my solution should work providing that the existing pipe from the trap to the outdoors is the right plastic to ensure the solvent welding sticks, if not that then like you guys said to take "disconnect existing pipe, measure and add inches needed, cut a new pipe and replace this new pipe with the existing pipe, weld, brackets etc.. and should be good as gold.

@Burnerman +1 for the solvent weld ?, what do you mean ? is +1 a brand for solvent weld? lol sorry slightly naieve with these sorts of things. though from what all you guys said sounds like I have grasped onto the right solution.

Should i purchase a new connector compression slip nut and rubber seal for the trap and new pipe connection within the cupboard when connecting up the new pipe?

Below is a picture of the sink below in cupboard, Thanks to all you guys again for your responses.

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+1 means he agreed with the previous post. ;)

I'd replace the washers in the existing trap personally, the new pipe might be a slightly different outside diameter, enough to allow a small weep. Pipework needs to be clean for solvent glue to work, the old pipework is stained where it was inside the fittings, so I'd replace to be on the safe side, for what it costs. https://www.screwfix.com/p/floplast-solvent-weld-waste-pipe-white-40mm-x-3m/44310
 
Hugh Jaleak said:
+1 means he agreed with the previous post. ;)

I'd replace the washers in the existing trap personally, the new pipe might be a slightly different outside diameter, enough to allow a small weep. Pipework needs to be clean for solvent glue to work, the old pipework is stained where it was inside the fittings, so I'd replace to be on the safe side, for what it costs. https://www.screwfix.com/p/floplast-solvent-weld-waste-pipe-white-40mm-x-3m/44310
Click to expand...

Ahh i understand , :) Thanks @Hugh Jaleak I will go ahead and do that, exactly for what it costs, regarding the washer ? are you talking about the rubber seal ? or big plaster nut connector, im not too sure what you mean by washer, if so, could you link as to where I could purchae this washer from ? if on screwfix or elsewhere, could you possibly provide me the link. Would be ever so grateful and thanks again for your help and reply.
 
Some pipe clips work need to have the solvent joint pushed into the wall, so you'd need to enlarge the hole slightly to get the clips set at the right height. Measure and set everything up before you start making any of the joints. Fit the outside joint in place first, and once you've got it fixed to the wall, then you can fit it to the bottle trap afterwards.

You may find that Toolstation and Screwfix don't seem to stock the solvent weld glue, and you've got to ask for it at the counter - they try and discourage the glue sniffers.
 
I'm referring to the plastic O ring and rubber washer that form the seal on the outlet from the trap. (U bend) If you replace the existing pipe going through the wall, you'll disturb this joint when you remove the existing (too short) section, do would probably be prudent to replace the O ring and washer at the same time. Replacement kit here, https://www.screwfix.com/p/floplast-replacement-trap-seal-black-40mm-4-pcs/40512
 
Hugh Jaleak said:
I'm referring to the plastic O ring and rubber washer that form the seal on the outlet from the trap. (U bend) If you replace the existing pipe going through the wall, you'll disturb this joint when you remove the existing (too short) section, do would probably be prudent to replace the O ring and washer at the same time. Replacement kit here, https://www.screwfix.com/p/floplast-replacement-trap-seal-black-40mm-4-pcs/40512
Click to expand...

Ok i understand just to confirm are you referring to changing the o ring and washer on both 1 and 2 nut connectors as shown below, or just one of them? do let me know which ones via the reference numbers I have attached via the pic below.

Thanks so much again @Hugh Jaleak, Looking to finish this tomorrow or during the weekend.

Kjv013F.png
 
Doggit said:
Some pipe clips work need to have the solvent joint pushed into the wall, so you'd need to enlarge the hole slightly to get the clips set at the right height. Measure and set everything up before you start making any of the joints. Fit the outside joint in place first, and once you've got it fixed to the wall, then you can fit it to the bottle trap afterwards.

You may find that Toolstation and Screwfix don't seem to stock the solvent weld glue, and you've got to ask for it at the counter - they try and discourage the glue sniffers.
Click to expand...

Ahh, thanks @Doggit ill bare that in mind, additionally when going to get the weld glue too. Thank you ever so much for your help.
 
MissBuilding1975 said:
Ok i understand just to confirm are you referring to changing the o ring and washer on both 1 and 2 nut connectors as shown below, or just one of them? do let me know which ones via the reference numbers I have attached via the pic below.

Thanks so much again @Hugh Jaleak, Looking to finish this tomorrow or during the weekend.

Kjv013F.png
Click to expand...
If I may, Hugh was talking about replacing the parts at joint 1, I see no need to disturb the other one.

Just jumping in if you are going to do the job today and Hugh can`t reply at the moment.
 
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