Pumping hot water

[plumb-tech]

Hi, after a bit of advice with regards to pumping hot water.


I have a customer who lives in a three storey house with thehot water cylinder on the top floor, bathroom is on the floor below and kitchentwo floors below. Currently the kitchen has got a hot water cylinder under sinkfeeding just the kitchen, but they want rid of it as it is inaccessible so can’tchange element, so I suggested we pipe the kitchen sink up to the hot watercylinder by bringing a pipe down from the bathroom above.
What they are worried about is the amount of time it willtake for the hot water to come through as they say it takes a while for it toget to the bathroom, but as it is two floors down will it get there quick or sameas bathroom or longer? If longer wouldfitting a pump next to cylinder help or not as surely there will be quite a bitof pressure anyway as it is two storeys down.

Any advice would be grateful

Thanks

 

[Killy Bing]

You want to fit a secondery return + a bronze pump to makesure you have ho****er on demand

 

[Killy Bing]

The secondery return is effectivly there to "bleed" hot water from the cylinder, around the system in a loop back to the cylinder,
not to pump it at pressure.
So when you open up the tap there is no cold leg to draw off.

pretty essential to lag all the hot pipework in the loop though or you'll leach too much heat from the cylinder.

 

[efficiencyman]

What I have done with my pumped loop is to wire in PIR occupancy / timer switches to run the pump only when someone triggers the PIR. Although I have lagged the pipes well there is no point in circulating heat when no one is about, it can be timed to only run for 3 mins or so, but ensures no dead legs works fine for me with a PIR on all three floors.

 

[Whyme]

Cant you just disconnect the under sink heater swap element then put back.?? cheaper.