low pressure shower valve

[petek]

I have persevered with poor flow and temperature control from my shower for some time but recently decided to do something about it. It didn't take lo ng to find what I think is the problem. The thermostatic exposed bar valve is a Grohtherm 1000 which according to the spec requires a minimum inlet pr essure of 0.5 bar. I only have a pressure head of 0.1 bar, i.e. water level in cold tank is approx 0.1 metre above the shower head. I am thinking of replacing the valve with one that has the correct spec, po ssibly a Mira Coda Pro, but as they are quite expensive I don't want to do it if it won't solve the problem. Does anybody have any experience of the M ira Coda Pro? Can anybody recommend any other make/model which will do the jovb? Cheers Petek

[Roger Mills]

I don't think you'll ever get a decent flow by gravity alone with that pressure.

Are both feeds at the same pressure - i.e. cold directly from header tank and hot from hot cylinder fed by the same header tank? If so, consider using a booster pump such as this if you can find somewhere to put it.

[The Natural Philosopher]

Do the sensible thing and install a water softener and mains pressure tank.

[Muddymike]

I agree. A pump will probably work out cheaper as well.

We simply have a pump to achieve decent shower rate of flow. Why do you say installing a water softener and mains pressure tank is the sensible option?

Mike

[Roger Mills]

Oops - looks like I omitted to a link for a pump. Try this one

but there are lots of others.

Just noticed that it claims to be "regenerative". Not sure what that means in this context. Anyone?

[petek]

pump-1-5bar/20423#_=p

Thanks for your comments but didn't want to go as far as installing a pump. Especially as the shower in the other bathroom, which has the same head of water obviously, has a reasonable flow . I should have mentioned this in m y original post. Anyway, decided to go ahead and fit the replacement Mira Coda valve. The fl ow is now adequate, while not being "forceful", and better than with the ol d Grohe valve. So I'm happy I did it. However it could be that most of the improvement came from fitting the new filters in the inlet ports. You shoul d have seen the crud that was obviously partially blocking the old filters! So, I now have a perfectly good, used Grohe valve that I have no use for. I f you're interested keep your eye on Ebay in the next few days. I also have the riser bar, flex hose and shower head for the Mira shower th at I didn't need. I bought the complete kit from Screwfix which was cheaper than buying the valve alone. £90 for the complete kit. This will be o n Ebay also if anybody is interested. Thanks again for your help and advice. Cheers Petek