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64 posts

Master Geek

# 253053 23-Jul-2019 11:00
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We are building a house and have a long run of about 16m (including going up and down the wall) and I was wondering if anyone has used a hot loop system and can comment on them?

The bathroom is pretty much just a guest bathroom so I was hoping to be able to turn it off when not required, maybe using a sensor to the pump so it would only come on when someone walked into the bathroom?

Is it worth it or do we just go standard with a pipe and live with the delay. This would be fine for us, but when we get carted out of the house in a box, new owners might find this delay a pain.

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3499 posts

Uber Geek


  # 2282938 24-Jul-2019 16:17
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Zeon:.. I.e 2.8L of water.


We have I would guess 15m-20m between our hot water tank and furthest faucet including probably 7m outdoor at 20mm before 15mm indoor. Our flow rate if we really let the tap rip is 90L per minute so we can get hot water pretty quick if we want it.


That's pretty good.


Energy-wise, running 2.8 litres out of a hot tap is about equivalent to filling a kettle, boiling it, and tipping it down the drain. That's BEFORE you get the hot water you want.



Yea I get that. So we have converted the area where the water tank used to be to a minor dwelling so there wasn't a place for it inside anymore. Plus have connected a seperate outbuilding up to the same tank too. With 2 kitchens and multiple bathrooms feeding from the same outdoor pipe, it should be pretty active and keep the water inside warm with enough insulation. Parts of the 20mm pipe are feeding 3x showers, 5x hand basins, 2x kitchen sinks, 2x washing machines and 2x dishwashers so it should be pretty active. it's also well positioned now for solar water heating which I want to do perhaps in the coming year or 2.


Seriously, all of these standards and regulations are too much. Like considering the distance to the water heater in the standard - what happens with solar water heating when its far from the user? I want to put the solar water heaters on a different building to where the primary users are with the hot water tank in between. In such a case is the water heater the sun so 150 million KM away?


It seems like all these regulations are in place because everyone became too cheapskate to want to build quality. As long as its safe, then should be up to the person building and if they can't sell it because its poor quality than that is their problem....

Speedtest 2019-10-14

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