I have an inflatable hot tub but also a heat pump water heater which is extremely efficient to heat water. As such, I’d like to fill the hot tub with pre-heated water instead of relying on its highly inefficient resistive heating element.
Of course I need to make sure that mixing with cold water is right such that the water is not too hot.
I do not want to use buckets for this. What is the easiest way to connect a hose for this (temporarily)?
Here is a picture of the water heater:
Here is a picture of the sink:
Ideally I could connect to a normal sink faucet directly because I could mix with cold water directly.
The picture above looks like the most normal faucet, the others (kitchen, shower) have very non-standard outlets