Are Filter/driers required on new installs

[socotech]

If the drier is in between liquid line shut off and condenser outlet, when system is pumped down there will be pressure on drier. This would be ok if there was a factory installed schreader inside condenser. You could shut off isolation valves and pump over with recovery machine.

[Snapperhead]

if its heatpump you can shove the gas into the AH unit if you know what im sayin ....

[IceWhiteice]

can you put two biflow driers on a system will it hurt anything

[Snapperhead]

wont hurt anything , but theres no real benefit either

its only going to act as one big dryer , because inbetween them will never get dirty