it is a solenoid designed for switching hydraulic oil. I believe it would take the heat. Should take the oil. These are only $25 each. Cannot locate one at the same price to switch all in one. One benefit would be I can switch the supply over before switching the return on purge cycles. I'm toying with the idea right now of building my own 2 tank setup, on a budget. It will be done right, but I can't justify a commercial two tank system that costs more than the car did! One concern I had with the valves is they might need the hydraulic pressure to actually make the spool shift.