Mains static pressure off the scale!!

[Barnjules]

Ah,. Cheers for that corbs. I'm def gonna change it then.

 

[chris watkins]

Always thought them to be cheap and nasty (533) but never knew they were dynamic only what a silly idea almost as bad as them pressure limiting valves they supplied with the first generation of unvented units.
Still every days a school day!!

You can't beat rwc imho
312 Compact (Cold) Pressure Reducing Valves (PRVs) | Reliance Worldwide Corporation (UK) Ltd.

 

[Barnjules]

That was very helpful chris. I like the look of them..thanks a lot for your help..and thanks to everyone else for an interesting an useful thread.

Cheers

Jules

 

[Best]

That is bizarre! This has been an education.
I hadn't an idea that the 533 valve didn't actually reduce the standing pressure on whatever it supplied. You would think "Pressure Reducing Valve" was exactly that!
I always wondered why they were so cheap and fairly small bodied and now I know! I will avoid them.
Thank goodness I never had to fit one to an unvented unit.

 

[ShaunCorbs]

That is bizarre! This has been an education.
I hadn't an idea that the 533 valve didn't actually reduce the standing pressure on whatever it supplied. You would think "Pressure Reducing Valve" was exactly that!
I always wondered why they were so cheap and fairly small bodied and now I know! I will avoid them.
Thank goodness I never had to fit one to an unvented unit.

tbh i only use them for secondary prv close to a set of sinks etc (there ok in that way )

 

[Best]

tbh i only use them for secondary prv close to a set of sinks etc (there ok in that way )

It has just occurred to me that I fitted a 533 PRV solely to my brothers outside tap a few years ago because any hose connections to power washer etc, were blowing apart with the mains pressure. Once I fitted it there has never been any problem with the pressure. Surely the static pressure should have still been same?