M
mtotowamungu
Hi I am new to the forum , yes with a problem. Hope some one can enlighten me Thanks
Situation:
New Vaillant Ecotec 837 plus installed in the loft is supplied by mains water feed (old house limited pressure),
Cold water from the loft tank is pumped a to thermostatic Hans Grohe shower through 2 bar pressure regulator. The pump ia a 3 Bar Positive head twin Monsoon situated on bath room floor in airing cupboard where old cylinder lived.
All cold taps and toilets also fed via the same pump except kitchen which is mains fed as ususal.
Problem.
Shower in bathroom starts of with a normal stong flow, as warm water reaches thermostat, the flow reduces to a drip, on lowering shower head the water pump startsup and shower resumes normal function. But only sometimes cuts off during the shower.
Two solutions have been proposed but not everybody agrees with them and there is no certainty either will solve the problem.
1. To use a single 3.5 bar negative head water pump instead of the positive head pump to feed the cold water to the shower again regulated to 2 bar to match mains pressure.
or
2. To use a single 3.5 bar negative head water pump to feed the boiler from the cold water tank and to T off the cold water supply before it gets into the boiler . i.e. share the pump for Both the boiler and cold water .
This is expected to provide the most balanced supply.
Some say we cannot or should not pump water into a combi boiler !
I would have used the mains water for cold supply , but the pressure is likely to be insufficient to meet needs of 2 bathroom and the rest of the house.
A jpeg water diagram is also attached.
Will be grateful for any comment or guidance. thanks
Situation:
New Vaillant Ecotec 837 plus installed in the loft is supplied by mains water feed (old house limited pressure),
Cold water from the loft tank is pumped a to thermostatic Hans Grohe shower through 2 bar pressure regulator. The pump ia a 3 Bar Positive head twin Monsoon situated on bath room floor in airing cupboard where old cylinder lived.
All cold taps and toilets also fed via the same pump except kitchen which is mains fed as ususal.
Problem.
Shower in bathroom starts of with a normal stong flow, as warm water reaches thermostat, the flow reduces to a drip, on lowering shower head the water pump startsup and shower resumes normal function. But only sometimes cuts off during the shower.
Two solutions have been proposed but not everybody agrees with them and there is no certainty either will solve the problem.
1. To use a single 3.5 bar negative head water pump instead of the positive head pump to feed the cold water to the shower again regulated to 2 bar to match mains pressure.
or
2. To use a single 3.5 bar negative head water pump to feed the boiler from the cold water tank and to T off the cold water supply before it gets into the boiler . i.e. share the pump for Both the boiler and cold water .
This is expected to provide the most balanced supply.
Some say we cannot or should not pump water into a combi boiler !
I would have used the mains water for cold supply , but the pressure is likely to be insufficient to meet needs of 2 bathroom and the rest of the house.
A jpeg water diagram is also attached.
Will be grateful for any comment or guidance. thanks
