ᐅ Hot water circulation pump

Created on: 23 May 2015 10:19
L
Legurit
Hello everyone,

Our heating engineer said he would usually install a circulation pump, but it could also be omitted. Operating costs would be about 30–50 € per year, and he estimated that it would need to be replaced every 6 years.
Of course, we don’t want to wait 30 seconds for the first warm water. He also mentioned that he can reduce the pipe diameter to somewhat lower the wait time.
Does anyone have experience with these pumps – from what pipe length or distance would you recommend installing one?

Another topic was the ventilation of the utility room, bathroom, and kitchen – he said it might be possible to install an air admittance valve (also known as a "mushroom valve" or similar) to avoid venting through the roof. Does anyone know about this? Does it cause any odors? I find that hard to imagine.

Thanks and best regards.
lastdrop24 May 2015 09:32
Do you have green energy?
lastdrop24 May 2015 09:34
So you are using fossil fuels to power your pump? That's really not good...
S
Sebastian79
24 May 2015 09:35
Better read everything again...
L
Legurit
24 May 2015 10:00
No fundamental debates please. I can understand both sides and am also conflicted. However, we will start without a circulation pump. With a ground-source heat pump, hot water is simply the biggest energy consumer. Yesterday, I consciously paid attention to water use – I don’t really mind when washing hands; warm water in the kitchen is important, but that is also quite close to the source in our case. The bathtub doesn’t matter. The shower would be the only concern...

Better focus on the townhouse instead.
Y
ypg
24 May 2015 10:21
Before discussing the city villa, a couple of notes about water consumption:

The first cold water is good for the face, then warm water comes for brushing teeth. I don’t see this as a loss of comfort.
In the kitchen, we even limited the hot water pressure because when I leave the water running to fill the sink for about 10 seconds, it otherwise becomes too hot for washing dishes (mind you, the economy version: only one-third of the sink is filled).
I come from a house where we waited about 30 seconds in the bathroom—quite a long time—so waiting 5 seconds feels like a luxury.

Regarding saving water: The toilet flush should not be affected by water-saving efforts. It’s better to flush more often (a lot of toilet paper means multiple flushes) to prevent pipe blockages, and also after every urination to avoid acid buildup on the enamel. Every plumber I’ve talked to has confirmed this approach!
B
Bauexperte
24 May 2015 10:44
lastdrop schrieb:
I don't know, but I have read it quite often now.

I was not familiar with this article. Thanks!

Best regards, Bauexperte