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 Post subject: Tape for sealing small leak in waste pipe?
PostPosted: Tue Apr 19, 2011 8:30 am 
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Location: Norwich, Anglia de l'est et la république de francophilie
We have a small but persistent leak from an elbow joint in a waste pipe (i.e waste leaves at low pressure) that exits our shower tray via a cupboard - the leak is in the cupboard.

Any suggestions for the name/variety of tape that I could buy in a French DIY store to wrap around the joint and seal it externally (the pipe would need to be cut and re-jointed to make a new internal seal, so I'm trying to avoid this)?

many thanks,

Fred

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 Post subject: Re: Tape for sealing small leak in waste pipe?
PostPosted: Tue Apr 19, 2011 9:19 am 
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Hi Fred,

You're probably thinking of Ruban PTFE or Tape PTFE.

Image

Or you can buy a new joint for the inside of the pipe or wrap Bu-tylene tape all around the outside for a bodge job which should work OK.

Image

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 Post subject: Re: Tape for sealing small leak in waste pipe?
PostPosted: Tue Apr 19, 2011 10:58 am 
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Many thanks HWH, Ruban plastifié was exactly what I needed (even managed to pick some up at the supermarket).

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 Post subject: Re: Tape for sealing small leak in waste pipe?
PostPosted: Tue Apr 19, 2011 11:08 am 
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FredM wrote:
We have a small but persistent leak from an elbow joint in a waste pipe (i.e waste leaves at low pressure) that exits our shower tray via a cupboard - the leak is in the cupboard.

Any suggestions for the name/variety of tape that I could buy in a French DIY store to wrap around the joint and seal it externally (the pipe would need to be cut and re-jointed to make a new internal seal, so I'm trying to avoid this)?

many thanks,

Fred


Ah, crystal ball time for us plumbers :lol: , sorry Fred but it helps to know what type of material the pipe is made of, if its PVC and a solvent cement joint, I would dry it off, and then give it at least 2 if not 3 coats of PVC cement around the mouth of the joint, making sure that each coat is dry before another coat is applied, and also making sure that the appliance is not used for 24 hours after bodging the joint

Poly-Butylene (push fit rubber ring joints) does not glue

PTFE tape is only used for threaded joints, and even then the threads need to be "broken" so that the tape can bind on the thread, otherwise the water/air tends to get between the thread and the tape and leak out, as I know to my cost (I fitted 20 radiators with chrome valves, way back when PTFE was new on the market, every bugger leaked, because the chrome and the PTFE did not bind together, also a mate of mine laid a 2" galvanised iron pipe water main, with a plug in the end of it, and when the inspector tested it to 200 lbs inch², it just undid its self, this was partially his own fault because he did not fit a "thrust block" at the end of the pipe line), to "break" the thread just rough up the thread by running a hacksaw blade around the threads and across the threads, or use an adjustable set of pipe grips to just lightly turn over the top of the threads

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 Post subject: Re: Tape for sealing small leak in waste pipe?
PostPosted: Tue Apr 19, 2011 11:19 am 
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Location: Norwich, Anglia de l'est et la république de francophilie
Thanks Peake, it's PVC so I'll get hold of some PVC cement, as you suggest; bodge job with Ruban tape should hold it for the time being.

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 Post subject: Re: Tape for sealing small leak in waste pipe?
PostPosted: Tue Apr 19, 2011 11:19 am 
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So you have kept your crystal ball have you Peake, I got rid of all the clutter years ago.

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 Post subject: Re: Tape for sealing small leak in waste pipe?
PostPosted: Tue Apr 19, 2011 11:23 am 
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Papibryn wrote:
So you have kept your crystal ball have you Peake, I got rid of all the clutter years ago.


Yep Papi, I find it to be a bit useful when answering a posters question when I dont have the full facts, but it aint much use otherwise, if it were I would have won the lottery years ago

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 Post subject: Re: Tape for sealing small leak in waste pipe?
PostPosted: Tue Apr 19, 2011 11:27 am 
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Thought there must be a reason for you coming up trumps so fast on every query, keep up the good work.

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