Spring safety valve setting.

[PhoenixServices]

Any of you guys know how to set one of these valves (see link)

Toolstation

never fitted one before and as it's got no markings on, don't know where to set it.
Cheers

 

[gassafe]

Iv only seem them on really old installs... How come your fitting one? I would guess there factory set??

 

[PhoenixServices]

Replacing one that is leaking. Maybe shouldn't of fiddled with it then

 

[missplumb]

I would guess it is factory set but toolstation really should give more product information

 

[PhoenixServices]

My own fault for buying it from tools ration. I presume the tighter the spring is coiled the higher the pressure it will go off at.

 

[albatross]

Realistically you cannot safely fit it. You can never be sure what pressure it it set at so how can it be considered safe?
If you want it to open at 3 bar but it doesn't open till 6 bar you may be looking at a prison sentence.
Fit a CE marked valve designed and tested to open at a set pressure.

To be honest though I have removed and plugged some of those in the past, they were often fitted on old solid fuel systems, if you now have a gas boiler with a thermostat and a continuous open vent with no valves then it is not required.

 

[Best]

No good those safety valves. They were fitted years ago to mainly old oil boilers and one of the reasons was they were cheap. Also plumbers were probably not in the habit of using proper 3bar valves. I remember they once were about 80 pence.
They contain a 'piston' part with an O ring seal & a spring pushing it all tight with the adjusting nut. Heat destroys the O ring seal easily & they leak.