Incoming Water pressure

[Kingmadness]

We have a viessmann 111 and we was expecting faster hot water flow. I looked at the PRV it is set to 2 bar, the boiler has a 46l storage tank, so will this PRV set to 2 bar affect the hot water flow rate to the taps.

Can the PRV be set higher than 2 bar ?

Regards

Ant

 

[ShaunCorbs]

Do you know your mains pressure and flow rate ?

 

[Kingmadness]

Do you know your mains pressure and flow rate ?

Hi

Yes it is 5 bar and 25L

 

[centralheatking]

Hi

Yes it is 5 bar and 25L

25 litres per min. Is this from a cold mains tap. Wow where is this part of heaven Centralheatking

 

[Kingmadness]

25 litres per min. Is this from a cold mains tap. Wow where is this part of heaven Centralheatking

Hi, yeah this is the outside tap straight T off from the incoming mains.

Filled a 13L bucket in 30 seconds, attached a pressure gauge which read near 6 bar.

This is in good old lincolnshire, old house built in the 30s

 

[ShaunCorbs]

Prv can be set higher and tbh with 5 bar incoming sounds like you need the main reducing as well

 

[Kingmadness]

Prv can be set higher and tbh with 5 bar incoming sounds like you need the main reducing as well

Thanks

Just by not opening the stop tap fully?

 

[ShaunCorbs]

Thanks

Just by not opening the stop tap fully?

no by getting another pressure reducing valve fitted / if your capable of doing it yourself

3-3.5 bar is more than good enough

 

[centralheatking]

Thanks

Just by not opening the stop tap fully?

You need to study the relationship between pressure and volume. Closing the stop tap will only reduce the volume. Get a decent PRV like a honeywell do4 I have used 10000 of these to date never a faulty one. Centralheatking