Mains static pressure off the scale!!

[lame plumber]

static pressure on my road around 10 am is 16bar, dont need power showers down here. All the prvs I have installed are set around 3 bar, they never read the static pressure so I would assume yours has an issue, probably wrong way round, or knackered

 

[SimonG]

Would it have to be a governor like gas to reduce static?

 

[SimonG]

Also if you had 10 bar incoming static with a prv on an unvented cylinder with a 7 bar tprv. Why wouldn't it pass? Goes to pass at 10 bar but as soon as static transfers to dynamic at 3 bar so wont pass?

My brain is hurting. Been a long day.

 

[mfgs]

Also if you had 10 bar incoming static with a prv on an unvented cylinder with a 7 bar tprv. Why wouldn't it pass? Goes to pass at 10 bar but as soon as static transfers to dynamic at 3 bar so wont pass?

My brain is hurting. Been a long day.

haha I am the same when it comes to pressure and flow and trying to work out how they affect each other etc.

 

[mfgs]

static pressure on my road around 10 am is 16bar, dont need power showers down here. All the prvs I have installed are set around 3 bar, they never read the static pressure so I would assume yours has an issue, probably wrong way round, or knackered

That's ridiculous, bet you've never seen an booster set or an accumulator fitted near you then!

 

[lame plumber]

thinking about it, all I ever do is set the prv up under flow, never bother to check static pressure, so you could probably expect the pressure to build up slowly as the valve passes.

The only booster sets I see are in hotels with leaky systems full of corrosion

 

[Best]

If the PRV limits the static pressure beyond the valve, then surely the dynamic pressure will also be limited?

 

[lame plumber]

If the PRV limits the static pressure beyond the valve, then surely the dynamic pressure will also be limited?

you would think so.

 

[mfgs]

If the PRV limits the static pressure beyond the valve, then surely the dynamic pressure will also be limited?

They definitely do the dynamic pressure as that is how you set them up. Just not 100% sure if they also stop the static pressure build up past the valve

 

[Best]

They definitely do the dynamic pressure as that is how you set them up. Just not 100% sure if they also stop the static pressure build up past the valve

They really have to stop the static pressure past the valve. If they don't then the unvented units could build up pressure way beyond their operating normal and also everything else on the mains, like electric showers could possibly be blown apart if incoming mains was extremely high.