here's what i think i'm doing; what have i missed?
tub >> drain tee valve >> fill tee >> pump >> thermo/mano meters >> filter
>> heater >> thermo/mano meters >> chemical injection tee >> flow
switch >> water meter >> check valve >> aeration tee >> tub
in case it matters, the tub is _above_ the rest of the parts. to lock the system for maintenance, i will rely on the check valve and the neutral position of the drain tee valve. fill (at mains pressure) will use both lines, reversing flow on one of them.
thanks!
tub >> drain tee valve >> fill tee >> pump >> thermo/mano meters >> filter
>> heater >> thermo/mano meters >> chemical injection tee >> flow
switch >> water meter >> check valve >> aeration tee >> tub
in case it matters, the tub is _above_ the rest of the parts. to lock the system for maintenance, i will rely on the check valve and the neutral position of the drain tee valve. fill (at mains pressure) will use both lines, reversing flow on one of them.
thanks!