Hot water recirculating pump

[J4Plumb]

I have a baxi combi instant boiler and need to fit a recirculating pump as hot water to kitchen faucet takes forever due to distance from boiler. Can anyone suggest the best pump to use.

 

[Aire]

You can't fit a circulating pump to the hot water circuit of a combi.

 

[ShaunCorbs]

You can't fit a circulating pump to the hot water circuit of a combi.

well you could but would be wasteful

op whats the distance to the boiler from the tap roughly

 

[Aire]

well you could but would be wasteful

op whats the distance to the boiler from the tap roughly

Well yes I suppose technically you can but please don't

 

[centralheatking]

I have a baxi combi instant boiler and need to fit a recirculating pump as hot water to kitchen faucet takes forever due to distance from boiler. Can anyone suggest the best pump to use.

How far is the kitchen tap from the boiler. What is the issue..excess
water usage or gas usage to supply the tap ? there are other solutions if you answer the questions. A diagram would help
centralheatking

 

[townfanjon]

How far is the boiler from the tap ?

 

[chris watkins]

Self regulating heat tape ? if you are able to get to the pipework.

or simple adding good insulation would help greatly, it would have to be installed if you went with a circulating HW system anyway.

 

[SimonG]

Under sink 15 litre water heater.

 

[chris watkins]

Under sink 15 litre water heater.

and it could be inline, I have done that before.

 

[SimonG]

and it could be inline, I have done that before.

Didn't think of that. Good call.

 

[chris watkins]

and it could be inline, I have done that before.

Come to think about it, it was from stored mains hot water not a combi, I will need to think that one through.........

but it should work & be beneficial shouldn't it "G"man ???

 

[J4Plumb]

It is the issue of wasting at least 3 to 4 litres before get any hot! Is probably about 6 to 7 meters of pipework but I don't really want to pull all floorboards up.

 

[oz-plumber]

A pump would not make any difference to your situation.

Even if you had a circuit back to the boiler with a pump installed, you would get hot water initially and then cold again when the combi fires up and it will be like you have now.

If you had a 25 ltr cylinder under the sink and a circuit back to the boiler, with a pump, you would effectively have 25 litres of hot water on standby.
- Next issue can you achieve 65 Celsius in the cylinder.
Probably not - so would need and electric element in the cylinder also.

Just get an electric cylinder under the sink

 

[Aire]

I think having 6/7 metres of pipe work leading to the tap is more than acceptable. I can't see how such a short run, can take 4 litres of water to get hot, do you have the preheat turned On?

 

[Chuck]

7 meters of pipework

7 m of 15mm copper holds one litre of water not four.

 

[ShaunCorbs]

Have a look at Combi saver

 

[J4Plumb]

Thanks for all help. Will look at preheat, which should be on! Then work from there.

 

[centralheatking]

Combi Save

How about this baby from teddington systems, I have one at Selby and it works fine. And No I did not design it centralheatking

 

[Scott_D]

Pipe the kitchen sink in 10mm from the boiler