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Blanking Cap For Water Pipe

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Booldawg | 20:39 Fri 21st Nov 2014 | Home & Garden
9 Answers
I've recently uninstalled a dishwasher (cold feed only). This has given me a water pipe that obviously has a on/off switch with a threaded end.

There is a slight drip from the now exposed threaded end.

Is there a water-tight blanking cap available that screws onto the end of the pipe to stop the leak?
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You'll be able to get a stop end from a plumbers merchants along with some PTFE tape for the thread
There are various types, Booldawg. Has rusty says don't forget to use a bit of PTFE tape on the threads though.
http://www.ebay.co.uk/sch/i.html?_from=R40&_trksid=p2051541.m570.l1313.TR0.TRC0.H0.Xwater+pipe+end+stop&_nkw=water+pipe+end+stop&;_sacat=0
Assuming you have 15mm copper pipe as the feed, this is what you need.

http://www.screwfix.com/p/stop-end-15mm-pack-of-2/65021

If it were me, I would remove the old fitting and then fit the blank cap to the end of the pipe.
The normal size is a 3/4 inch BSP brass blanking cap with fibre washer. It certainly isn't the contraption suggested immediately above, which is for an unthreaded copper pipe.
From your description it seems like they simply fitted a valve to the end and it's not perfectly closed. Ensure it is turned enough. Aside from that, they come in standard sizes. Have a measure of it, then pop into your local DIY shed for a suitable end stop as folk have suggested.
This is why an edit facility would be nice. End stop / blanking cap / whatever. Have a look and use your judgement on what will fit the valve.
Agree with O G it sounds like the on/off bit won't turn off properly you'll need to take it off and fit a compression blanking cap.
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thanks all. I've ordered a 3/4 brass threaded end cap. Sure I have some PTFE tape somewhere!
I have two of these blocked off feeds, one to a removed dishwasher and the hot water supply to a new washing machine, cold feed only. I removed the plastic end on the water pipe and cut a piece of stiff plastic to fit in the cap. Using the original rubber washer as a seal I screwed it on the valve to blank off the end.

Having said that my valves didn't leak in the first place.

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