Pressurise kitchen hot water or not?

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ryan-neil

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Hi,

I'm fitting a 3 bar pump to my hotwater cistern to feed my bathroom, i wasn planning on leaving the kitched unpressurised. Is this ok or should i put the kitchen on the pressurised feed, pressure will be 3bar.

Thanks
Neil
 
My plumber advised against it for safety reasons.

Didn't want him looking at my scalded arm or face & saying "I told you so" so I took his advice.
 
Many pumps recommend that a blending valve is fitted, this prevents the pump from getting damaged and the risk of scalding at the tap outlets.
 
This pump is also supplying the bathroom so i assume the blending valve would be fitted in the kitchen.

Is this correct ?
 
ryan-neil said:
This pump is also supplying the bathroom so i assume the blending valve would be fitted in the kitchen.

Is this correct ?
Click to expand...

Pumps have a maximum temp which they work at and even at that a constant high temperature water affects the pump life.

A good blending valve fitting at the feed from the tank is both safe and economical in that you are getting the perfect safe temp of water at the taps and using less hot water into the bargain.
 
What exactly does this blending valve do?

I have a pump installed onto the hot and cold supply for the bathroom but when using the shower it is very difficult to regulate it with the cold water overpowering the hot, so much so that it has to be reduced to a trickle when using the shower.

I only have this problem when the immersion heats half the tank for a shower. If the tank is heated using the central heating (tank fully hot) then there is no issue and the shower is perfect.

Would a blending valve help me out? And if so, where do I install it? Is it from the hot water feed to the pump?

Thanks
 
see this page [broken link removed]

Blending valves as they call them are really only suitable for underfloor heating applications. This is due to flow rates etc.

Other companies sell domestic hot water blending valves called just that. Your run of the mill blending valve would be a lot cheaper than items 7 and 8 in that list which are the ones you should really install. They are relatively easy to fit with good DIY skills at the hot tank.
 
Ballyman, a blending valve (proper name thermostatic mixing valve) mixes cold & hot water to a preset, which is adjustable. It would be fitted on the hot inlet to the pump.
I don't think it will sort your problem, to a certain degree you blend/mix the water when you have a shower, to maintain a reasonable temperature.
You just haven't enough stored hot water when you use the immersion. Can you use your central heating to heat hot water only?
 
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