flexi screwed on to iso valve

[Mgrant]

Are flexis ok screwed on to iso valves ornis.a 1/2 female to 15mm compression fitting needed? I have filed the end.of a service valve before to give a flatter surface for the rubber. Whats everyone else do in this situation?

 

[ShaunCorbs]

if you have filed it flat you should be ok but normally just use a 1/2 male iron

 

[REDSAW]

its ok if you dont overtighten and cut into the rubber seal

 

[snowhead]

There's an adapter you can get if you feel the need;

http://www.toolstation.com/shop/p14081

 

[Best]

Some of the folk on here use a spare rad valve tail. Guess that's a free solution. :smile:
I prefer to use male straights (or sometimes male bends where more apt) and that means I can put the isolating valves at where I want them - usually lower in a kitchen or basin unit and the male fittings for at the tap flexis.

 

[thereisawizza]

I've found the tail tap adaptors are too hard for an olive to bite into. Just file a nice face onto the valve (if you've already used up all your male irons...)

 

[Mgrant]

Was wanting to fo on to a flexi as it saves on a fitting

 

[Best]

Was wanting to fo on to a flexi as it saves on a fitting

Saves on a fitting?? A 1/2" male straight is about 80 pence.
Or a spare rad valve tail is free.
To join onto an isolating valve is using the wrong fitting. The olive and nut you discard were there for a reason.
I wouldn't waste my time filing a valve

 

[Subby]

Swings and roundabouts for me. Screwing the flexi straight onto a ballofix is not correct but it works and using ballofix > stub of copper > male iron > flexi is adding 2 more joints which have the potential to leak and doesn't look as neat, so as I say it 6 of one half a dozen the other.

 

[rpm]

2 more joints done correctly though, do it the other way and you haven`t got a leg to stand on if it fails at anytime.

 

[Subby]

Has anyone seen one of these controversial joints leak? I can't think if I have but want to be able to sleep tonight!

 

[rpm]

So sorry to ruin your sleep but yes, or was it more to do with the cheap flexi? I`ll never know cos that got replaced as well.

 

[mfgs]

If you over tighten it they do leak due to the face not being flat. I like the rad tail idea, I don't know why I have never thought of that before.

 

[Best]

Has anyone seen one of these controversial joints leak? I can't think if I have but want to be able to sleep tonight!

Yes! Seen loads of them just having been slightly weeping, but I know of one where it leaked and eventually started coming through a ceiling. Done by a plumber. Just found the photos. First photo is how it should have been done. Second photo is how the plumber did it. Sleep well! :grin:

 

[Alert]

Yea whatever you do don't tighten straight onto the valve especially on a hot supply, overtime the expansion and contraction will cut into the rubber washer and eventually fail !

 

[Best]

Washing machine hoses have the same problem with the rubbish washing machine valves you get nowadays

 

[Paulplumb]

Washing machine hoses have the same problem with the rubbish washing machine valves you get nowadays

I hear yah. I use these from toolstation

 

[quality]

All the cheap stuff is made to a minimum quality hence price which lends itself to a cheaper job

 

[Best]

I hear yah. I use these from toolstation

View attachment 26630

That looks the business! Nice wide flat wide face

 

[quality]

just don't turn the handle after 6 months

 

[Best]

just don't turn the handle after 6 months

That's why I prefer an inline quality valve. Small lever type for gas are excellent.
The washing machine valve then can be used just to connect WM hose onto, or I have used 15mm x 3/4" male straights if it has a decent flat face

 

[Mgrant]

So may start going for the iso valve then a 1/2 male above. Have always filed beforr and.never had a problem. Though this time working on new.builds have a full estate to do.

 

[Mgrant]

But obviously want to keep the fittings behind the pedestal to a minimum. So instead of a iso.and flexi. Would now have an iso then 1/2 male to.15mm compression fitting

 

[Subby]

All they need to do now is invent a ballofix 15mm compression one end and half inch male the other with the flat face. Jobs a good un

 

[Best]

But obviously want to keep the fittings behind the pedestal to a minimum. So instead of a iso.and flexi. Would now have an iso then 1/2 male to.15mm compression fitting

Why worry? Adding a male straight will prevent the risk of a leak at the flexi flat washer seal.
Yes, you will have 3 compression connections, but they will not leak if you do them correctly. Only thing that can leak is if it is a cheap isolating valve fitted.
I have never had any bother or concern with brass joints where they are needed above floors.