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Discuss Kitchen mixer tap pipe connections in the Plumbing Jobs | The Job-board area at PlumbersForums.net

Nnn

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Hi

New here, so hello to all.

I am to replace a kitchen mixer tap which has been in since the house was built 4 years ago.

Upon inspection, the plumbing doesn't include isolation valves so I need to cut off all water to the house.

Before I go ahead and fit this I want to take the opportunity to fit isolation valves or service valves.

Can someone advise the best way given there's plastic pipes with a compression fitting in place? Better to add an isolation valve to the existing one or remove the old and put the isolation valve in new? Not done this before and not sure if the existing isolation nut/olive can be simply re-tightened?

I posted a pic of a service valve which could do the job I believe.

Posted some pics to show the existing fittings. The 90 degree fitting is on the hot feed from the combi boiler.

The tap is astracast and looks like 1/2 inch fittings.

20190513_010108.jpg


20190513_010050.jpg


Screenshot_20190515-085823_Chrome.jpg
 
Remove the clip from the plastic elbow. Remove the plastic pipe and replace with copper and full bore isolatation valves. A little more copper and 2 x 15mm x 1/2” compression couplers then flexis that come with the tap.
 
Remove the clip from the plastic elbow. Remove the plastic pipe and replace with copper and full bore isolatation valves. A little more copper and 2 x 15mm x 1/2” compression couplers then flexis that come with the tap.

In addition to the full bore iso valves, you will need 15mm compression to 1/2" BSP male couplers. It will end up looking like the bottom picture but will be a MUCH more secure & safe connection.

Do not reuse the existing olives. Do as Harvest has said and use copper pipe.
 
Thanks all. Easy enough to remove the plastic pipe from below (press down ring isn't it?)?

Does copper pipe fit the plastic coupler ok without damaging seals and a pipe slice a must too?

So a short copper pipe, 90deg compression iso valve then BSP fitting? What are these BSPs btw?

Thanks again!
 

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