Head of Water

[Crakkers]

Hi

I have poor hw flow due to the fact the cold tank sits almost on top of the copper cylinder. I am toying with the idea of pumps etc, but know that raising the cw tank will help no matter what.

Can anyone tell me how much extra flow I will get per unit rise in tank? For example, if I can raise the tank only 24 inches, is that worth the effort?

Any ideas?

Thanks

C

 

[muggles]

The poor hot water has nothing at all to do with the location of your tank in relation to the cylinder, but raising the tank would help. One metre of head is equivalent to 0.1 bar, so raising 24" will give you about 0.06bar of extra head, which ain't much

 

[Crakkers]

The poor hot water has nothing at all to do with the location of your tank in relation to the cylinder, but raising the tank would help. One metre of head is equivalent to 0.1 bar, so raising 24" will give you about 0.06bar of extra head, which ain't much

0.06 or 0.6?

So why do I have poor HW flow if the tank and cylinder position are not relevant?

 

[muggles]

0.06 as 1m = 0.1 bar, therefore 0.6m = 0.06 bar because 0.1×0.6=0.06. 0.6 bar would be six metres

As to the reasons for your poor hot water flow, you need to give much more information before I can come close to answering that! Is it a house or a bungalow, how old is the cylinder, are you in a hard or soft water area, what sort of taps do you have etc etc

 

[Crakkers]

0.06 as 1m = 0.1 bar, therefore 0.6m = 0.06 bar because 0.1×0.6=0.06. 0.6 bar would be six metres

As to the reasons for your poor hot water flow, you need to give much more information before I can come close to answering that! Is it a house or a bungalow, how old is the cylinder, are you in a hard or soft water area, what sort of taps do you have etc etc

Thanks for your time here!

1930's semi house, 22mm pipe from cyclider feeding bathroom taps going down to 15mm to the kitchen. I estimate the cylnider and the cold tank to be no more than 25 years old. Replaced bath and kitchen taps within last 5 years.

Thanks!

 

[muggles]

Has the hot water always been bad or do you think it's got worse? How long have you been there? Hard or soft water (do you get scale in your kettle?)

 

[Crakkers]

Has the hot water always been bad or do you think it's got worse? How long have you been there? Hard or soft water (do you get scale in your kettle?)

No scale in kettle.

Been in house 16 years, pressure always been low. It's just taken us that long to get really fed up with it!

 

[simond]

If you have had high pressure taps fitted, the performance will be awful off a standard tank system.

But then you would have noticed the performance drop the day the new taps were installed?

Assume you live in a two storey house with a cold water tank in the loft? Position of hot water cylinder is irrelevent.