The pipe feeding water to our house from the supply is 22mm.
As it feeds 2 houses there is a branch outside the house where the 2mm pipe was reduced to 2 15mm pipes then to the meters.
Some months ago I changed the branch and meter used 22mm pipe to feed into the house and this seemed to increase the water flow at taps etc to a satisfactory level. Supply to the house is approx 3 bar now, compared to just under 2 bar before the pipe alteration.
The cold water tank which feeds the hot tank is one of the first branches off the feed pipe, and this was fine until a few days ago when we noticed water coming out the tank overflow.
I took out the ballcock on investigation I found a bit of grit in the ballcock which stopped it shutting down completely. So I removed the grit and re-fitted the ballcock. After refitting it started to 'hammer' very loudly as it shut off when the tank is filled.
Anyone any suggestions as to why this has started happening.
ALSO - i thought about changing the ballcock for a new one, but see that there are 2 versions available. One for high pressure, and one for low pressure.
What are the differences, and what would be the effect of fitting the 'wrong' one.
Do they differ in terms of the amount of water flowing, or is purely to do with pressure. If it is only pressure, would it be better to fit a low pressure one and turn down the supply using the isolator which can be adjusted - or would a high pressure one be be better.
As it feeds 2 houses there is a branch outside the house where the 2mm pipe was reduced to 2 15mm pipes then to the meters.
Some months ago I changed the branch and meter used 22mm pipe to feed into the house and this seemed to increase the water flow at taps etc to a satisfactory level. Supply to the house is approx 3 bar now, compared to just under 2 bar before the pipe alteration.
The cold water tank which feeds the hot tank is one of the first branches off the feed pipe, and this was fine until a few days ago when we noticed water coming out the tank overflow.
I took out the ballcock on investigation I found a bit of grit in the ballcock which stopped it shutting down completely. So I removed the grit and re-fitted the ballcock. After refitting it started to 'hammer' very loudly as it shut off when the tank is filled.
Anyone any suggestions as to why this has started happening.
ALSO - i thought about changing the ballcock for a new one, but see that there are 2 versions available. One for high pressure, and one for low pressure.
What are the differences, and what would be the effect of fitting the 'wrong' one.
Do they differ in terms of the amount of water flowing, or is purely to do with pressure. If it is only pressure, would it be better to fit a low pressure one and turn down the supply using the isolator which can be adjusted - or would a high pressure one be be better.