1/2" BSP hose to isolating valve?

[NeilPalfreyman]

Can I connect a 1/2" BSP fitting on a flexible hose (for a cistern) directly to an isolation valve that was connected to a fixed pipe via a 15mm compression fitting?

Will it work without leaks/last?

I know I could do it by leaving a short length of 15mm pipe in place and using a 15mm to 1/2" hose, but there's not a lot of room to maneuver!

Many thanks in advance.

 

[Agile]

You don't make it very clear what you want to do.

Presumably you have a male thread on the hose and if you unscrew the nut on the iso valve you are likely to get a male similar thread.

So to join them you will need a female to female coupler, know as nipples to the trade. Then connect with plenty of PTFE tape.

Nipples are available with parallel and tapered threads. But only easy to find in the parallel version.

Tony

 

[FiremanT]

Errr........ FxF is a socket, Tony.

A nipple is MxM

But I think the OP is referring to the Female of the flex straight onto the male of the isolator.

But as you are a newbie, I am sure we will all forgive you.

 

[FiremanT]

Was that bullying?Will I get deleted again?

 

[NeilPalfreyman]

Sorry for lack of clarity - both BSP fittings are female, so FiremanT is correct about what I'm asking.

This pic/spec for the pipe may help?

http://www.screwfix.com/p/hose-14mm-x-x-500mm/82014?_requestid=346881

 

[FiremanT]

A lot of jobs are done the way you suggest. However, the iso connector can damage the washer, as it is not a flat. Fit one of these on to the connection, and then the flex.
http://www.jtmplumbing.co.uk/pipe-fittings-c433/threaded-brass-fittings-1-4-to-4-c312/jtm-brass-tap-tail-extension-piece-m-x-f-7-8-long-pp10604?utm_source=google&utm_medium=cpc&utm_term=jtm-brass-tap-tail-extension-piece-m-x-f-7-8-quot-long-threaded-brass-3-brass-3-4-10070472pr&utm_campaign=product+listing+ads&gclid=EAIaIQobChMIsqDF9KzD1QIVUFgNCh2loAt2EAQYAiABEgJ8bvD_BwE



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[ChrisR]

Ha ha ha Tony - excited about parallel nipples? It's your age, dear.

Yes Neil the threads are the same.
An option is to put a 90º service/isolating valve on the cistern which may be a useful change of direction.
And/or you could put a 15mm street elbow (M & F) into the iso valve you have with a stub of pipe soldered in the F, to connect a standard tap connector flexy to the stub, going to the cistern

The ends of the iso valve fitting where the olive would go, can be very sharp and cut a rubber washer. If sharp, run a file across a few times, but it needs to be square ended.

 

[ChrisR]

Or what FT^ said , or screw an M & F brass elbow onto the cistern. May be hard to find. or expensive
eg
https://www.bes.co.uk/brass-equal-elbow-threaded-male-x-female-1-2-10545

theese are cheaper
https://www.bes.co.uk/15-mm-x-1-2in-union-angled-90-angled-service-valve-brass-chrome-plated

 

[NeilPalfreyman]

Thanks for your assistance with this, all. I ended up using a JG flexi connector with a built in 90 degree elbow to avoid any un-necessary strain on the pipe.

http://www.johnguest.com/speedfit/product/15-22mm-braided-hoses/elbow-pattern/

The other end is "speed fit" so installation was a simple as cutting the 15mm (copper) pipe after the iso valve.

Which leads me to one further question...

I've not used speed fit before. It's all in and leak free and I gave the 15mm copper pipe "stub" a good clean before fitting, but I'm still apprehensive about these types of connector. Should I be or am I worrying un-necessarily? The mains pressure in our area is pretty high!

I thought a photo may be helpful so you can see the type of speed fit connecting to the copper.