I've got a 5kl tank and it's connected to the toilets (which get murky quicker), the washing machine (clothes smell more often) and a garden tap.
It was a NSW BASIX/building standards requirement, but I don't understand the point of it:
- Every time we flush the toilet, it uses electricity to drive the pump. Seems like we're wasting electricity to save water.
- I can hear all of our neighbours pumps.
- And as soon as the tank level is low, the pump sucks in mains water rather than just bypassing the tank.
Anyway, I'm rambling. At the very least, I'd suggest making the rainwater an extra tap in your laundry instead of replacing the cold. This way you can easily bypass the tap if it makes your clothes dirty or smelly.