Hot Water Pressure

[blackbird2]

I have only got gravity feed hot water pressure via the water tank in the loft which runs through a gas-fired water heater. Does anyone know if it is possible to have a pump installed on the hot water system to increase the hot water pressure to at least 1 bar?
Many thanks
BB

 

[meldrew's_mate]

Try a single ended shower pump, or try Grundfos web site.

 

[blackbird2]

Thank you for your suggestions. I have just emailed Grundfos.
Many thanks.
BB

 

[blackbird2]

Try a single ended shower pump, or try Grundfos web site.

I have sent emails to Grundfos. They haven't even bothered to reply.

 

[MANDATE]

Is there not a danger in having a pump? You could pump water out of the water tank at a faster rate than it's going in.
I'm presume you want to increase the pressure to increase the flow but doesn't the gas fired water heater create a resistance? Could be tubes have scale due to hard water and diameter of tubes is now reduced so restricting flow and heat transfer. If flow was increased the hot water leaving heater would not receive the same amount of heat.
Would it be worthwhile considering increasing size of pipework, or replacing the heater.
I don't know I'm not a plumber!

 

[blackbird2]

Thanks Mandate for that input. I don't know if what you say is correct or not but is worth taking on board. The water tank has a 33 Imp gallon capacity. Surely the pump would provide most of that hot water at the hottest temperature for short periods. Any expert plumbers out there who may want to comment?

 

[kevplumb]

33 Imp gallon capacity.

and it would have to be short

 

[ChrisR]

WHat gas-fired water heater?
It probably has a flow-limiter.

 

[blackbird2]

It's a Lennox gas-fired water heater - made in Canada I believe. It stands about 51 inches high and about 63 inches in circumference. Don't know if this is of any help.