Minimum water pressure, OFWAT

[Peterd123]

I have seen on internet that OFWAT states the minimum water pressure requirement should not be less than 0.7 bar. what system would run efficiently at this preesure?
Regards
Pete

 

[diamondgas]

Could you expand on your question a bit Pete? Not sure what you mean by "system"? Are you referring to central heating 'system', domestic cold water 'system', hot water 'system'.....etc?

 

[snowhead]

OFWAT monitor the water supply companies.

0.7 is the minimum pressure water companies are obliged to supply any property, (according to OFWAT)

This relates to your partners property I assume, the 0.7 is external not internal.

 

[lame plumber]

gravity fed systems work fine

 

[AWheating]

it used to be 0.9 bar from memory but they probably dropped the figure to suit themselves. One of the bad things about self regulation.

you would not want to fit a combi on these sorts of pressures, which is why its very important to test pressure and flow rate of cold supply before banging a combi in. Gravity hot water best left in.

 

[lbp plg & htg]

Even though we pay for it they dont like giving it!

 

[Peterd123]

Could you expand on your question a bit Pete? Not sure what you mean by "system"? Are you referring to central heating 'system', domestic cold water 'system', hot water 'system'.....etc?

By system I mean everything. The boiler/water tank/header tank. They have installed it but I do not think there is enough height above hot water tank for header tank, so not giving any pressure to hot taps, and that is all the hot taps in the flat. I would like to know if there is a better system for a flat with low pressure and no loft.
Regards
Pete

 

[diamondgas]

By system I mean everything. The boiler/water tank/header tank. They have installed it but I do not think there is enough height above hot water tank for header tank, so not giving any pressure to hot taps, and that is all the hot taps in the flat. I would like to know if there is a better system for a flat with low pressure and no loft.
Regards
Pete

If I'm reading you right then you have a gravity fed system. If you have good cold water mains supply then the alternative would be converting to an un-vented system. Not a cheap thing to do, but as said it all depends on other factors as to whether you'd benefit and/or the conversion is feasible

 

[Peterd123]

If I'm reading you right then you have a gravity fed system. If you have good cold water mains supply then the alternative would be converting to an un-vented system. Not a cheap thing to do, but as said it all depends on other factors as to whether you'd benefit and/or the conversion is feasible

Would it be ok to fit a pump?

 

[lame plumber]

If I'm reading you right then you have a gravity fed system. If you have good cold water mains supply then the alternative would be converting to an un-vented system. Not a cheap thing to do, but as said it all depends on other factors as to whether you'd benefit and/or the conversion is feasible

unvented wouldnt work with a pressure of .7 bar either

 

[lame plumber]

whole house pump your only option or a pumped accumalator

 

[Reltub]

This theres a whole house pump called salamander have a look.