I have a 650 litre tank and at one point I could empty it and need to go home to top up
But I now use probably no more than 300l on even the busiest of days.
changing from fan jets to needle jets started the chain reaction that has led to me using less water.
But unlike quite probably everyone else, I have my flow control on the inlet side of the pump.
Happened quite by accident too.
The hose leading from van tank to the inlet side of the pump is just cheap, crappy hoselock hose (useless stuff but fine for going between tank and pump) and at one point I thought I was having pump problems, sometimes I had good flow, sometimes I didn't....
At that point my inline valve was where everyone elses usually is...on the pole hose....
Then after ferretting around in the back of the van I saw that the hose between tank and pump was kinked, and being cheap and thin, the suction from the pump was causing it to concave, further reducing the flow.
Hasn't appeared to do the pump any harm, so now I have put a flow valve right next to the inlet on the pump, and I adjust my flow from there.
No worries of the pump cycling thats for sure.
It's been like it for a few months now, and the pump is still working perfectly fine.
The jets of water from my brush now only go about 4ft in the air when the brush is lying on the floor...as against about 15ft!
You do have to be more careful when using a low flow rate though, it's much easier to get it wrong!
Ian