Mains Stopcock has been replace by my builder, is that right?

[desrob]

Sorry mate, didnt mean it to read the way it did, A stopcock should be fitted, with or without, a lever valve, if you want a lever valve aswell as then the lever valve can be fitted after the stopcock.

Having said that, it makes more sense to me to have a full bore lever valve instead as less restrictive etc... but they dont conform to BS1010 afaik so therefore has to be a stopcock.

eh!!!!!!!!!!!!!

 

[helix]

Some stop cocks although with BS 1010/2 standard eventually will corode even made with DZR material. I've just replaced 2 in a block of flats, had to use pipe freezing machine because mains could not be turned off in any flat separately!

 

[TimSmall]

I'm digging up an old thread, I know, but this one comes up highly on google searches, and since I've had a recent discussion on this, I thought I should post here...

There is some really comprehensive info on the use of ball valves as the stopvalve for a premesis, and various other water-regs related info (check valves, strainers) in a document by Arrow Valves which I found (google for waterrregstutorial9-isolatingvalves.doc ).

... it's well worth a read, but a quick summary:

There is no longer any requirement to use the BS 1010 style stop-cock. The new regs only refer to "stopvalves", and this can be any suitable valve, including ball valves which conform to an appropriate British Standard (e.g. BSIKitemarked), or appropriate European standard, or the Regulator’sspecification (e.g. WRAS / KIWA UK).

Some ball valves incorporate a serviceable spindle gland nut, and PTFE packing, just like the traditional BS 1010 stop cocks do. IMO, these are the type to use as stopvalves. Some have serviceable o-rings instead. Many don't have any sort of serviceable spindle seal, and so are the aforementioned chuck-away-and-replace type...

I've nothing to do with arrow valves and have never (AFAIK) bought any of their stuff, BTW. They have some quite nifty looking ball valves with built-in easily-serviceable strainers, and check valves tho', which I might try and get hold of to give them a spin.

Ball valves shouldn't be used where there is a risk of freezing, as they're more prone to damage than stop-cocks are.

 

[lame plumber]

Personally I know that full bore lever valves have no back-flow protection, but as has already been said, water meters have backflow protection. As should showers and garden taps. I'm not convinced that stopcocks offer fantastic back-flow protection either. What I do know is I've been to countless jobs where I've had to repair leaking stopcocks. Never been to a job where I've had to repair a leaking lever valve yet.

If I'm ever replacing a stopcock then I always replace them with a lever valve. The only real downside I can see with these is you have to turn them off slowly, especially on a high pressure mains. Otherwise you can get fairly severe water hammer if the water is flowing when you turn it off.

Most lever ball valves are rated up to 10 bars, some are rated to 25 bars. As lead-free solder joints start to give up the ghost at about 10 bars I wouldn't worry too much about the ball valve failing on you!

if youve never seen a leaking lever valve you havent lived, they are prone to sticking if not operated reglarly such that the first time you close them the nylon bush inside breaks and theres water everywhere. Water regs still require a stopcock to my knowledge and its bad practice not to use the required item even if old ladies like them. standards as ever going to the dogs!

 

[TBServices]

Even if I was to fit a lever/surestop whatever, it would be after a proper stopcock.

 

[Mike Jackson]

if youve never seen a leaking lever valve you havent lived, they are prone to sticking if not operated reglarly such that the first time you close them the nylon bush inside breaks and theres water everywhere. Water regs still require a stopcock to my knowledge and its bad practice not to use the required item even if old ladies like them. standards as ever going to the dogs!

More a case of people not keeping up with the standards. Spherical ball valves are now permitted to be used as the main stop valve within a premises. Have a look at Arrow Valves Ltd - Water Regulations and read fact sheet 9.

 

[lame plumber]

as interpreted by s hockley grace working for a valve co, so some bias may be forthcoming, omho as is allowed on forums,

 

[Mike Jackson]

So Oh disbelieving one, how about information from the horses mouth. Have a look at Water Fittings and Materials Directory - Copyright of WRAS 2005 which lists WRAS approved lever valves and note that a lot of the valves have a note which states " Meets the requirements of a stop valve".

Perhaps this information will put this one to bed finally - lever valves are suitable for use as a stop valve and are listed as such in the WRAS water fittings directory.

 

[lame plumber]

if you cant have a little tease occasionally life a bore, happy to agree that lever valves are allowed, I own a copy ofwater regs guide and know that there is a small para saying lever valves may be used and also the all valves must be servicable. Being of an age where change is hard! (joking) I would rather repair a good old stopcock rather than trying to strip down a lever valve with some harder to see bits. My main hate of lever valves is once they fail its normally fairly catastrophic and you dont half get wet.

 

[otherwayup]

More a case of people not keeping up with the standards. Spherical ball valves are now permitted to be used as the main stop valve within a premises. Have a look at xyz and read fact sheet 9.

The way I read the fact sheet, ball valves are permitted, but backflow protection is also required. Therefore a separate checkvalve needs to be fitted, if a ball valve is used.

I mention this as I was hoping to replace my old stopcock with ball valve without having to change any pipework. No such luck.

 

[SafeGasInstall]

You better of turn water from street and change the head of the valve but keep body in , this is possible if a your old stopcock is not the one that is fitted to lead pipes
post a picture and I can advise you what to do

 

[Mike Jackson]

The way I read the fact sheet, ball valves are permitted, but backflow protection is also required. Therefore a separate checkvalve needs to be fitted, if a ball valve is used.

I mention this as I was hoping to replace my old stopcock with ball valve without having to change any pipework. No such luck.

Backflow protection is not required in a normal domestic house at the point of entry, point of use protection is required. In multi occupancy properties with a single rising main where backflow could occur from higher to lower properties protection is required at all but the lowest property.

Although a loose jumper stop tap will function as a primitive back check valve it is not recognised as such within the water regulations.

 

[Keefy]

Speaking of ease of use and access, anyone seen this? (16) Controls, Fixtures & Fittings · 16 Design Criteria (up to 5 July 2010) · Lifetime Homes

 

[otherwayup]

post a picture and I can advise you what to do

Thanks for offering, but it's done. I just replaced with the same type with the flow direction arrow on the side.

All sorted for another 30 yrs, till I snap the handle off again.

 

[SafeGasInstall]

Well done ! Now turn it on fully and then go back 1/4 turn !
Also if you turn it of and them on every year