Add the last £25 and throw in a split charge relay Andrew!!!
lol... errrr NOPE!! Nat.
The float valve is linked to the solenoid valve. The solenoid valve is a "Normally closed" one.. with me so far?
OK.. the solenoid valve is fitted on the water INLET into the prefilters on the RO system. You must power it up in order to open it to let water into the system. There is an on/off swith on the system to do this.. you switch it on and it willlet water into the system..through the prefilters/RO/DI and into tank. When the water level in the tank reaches the valve it will lift and BREAK the cicuit to the solenoid valve and it will close and no more water can flow into the system so both product and waste will stop. It gives you fully automatic shut off because if no water can get in then none can come out.. simple eh? PHEW!! You really do need this type of shut off system for 40 inch RO systems otherwise waste will continue to come out even when the tank is full. Its BRILL to use and works very well. Plug your water into the inlet on van and run a hose from the waste outlet to a drain.. turn on and forget it then bingo a full tank in the morning and no waste running out all night.
BTW I got your mail and will reply positively to it as soon as I get time