FA540-72-G, Filling Adaptor to Fill 540 from 540 with Gauge and 72 of Stainless Braided High Pressure Tubing Filling Adaptor to Fill 540 from 540 with Gauge and 72 of Stainless Braided High Pressure Tubing Fill from a standard CGA540 valve to a standard CGA540 valve with this 6 foot single transfiller complete with a gauge and a slow fill restrictor built in.