Price $384 Robinair Internal Storage Vessel With Valve. The internal storage vessel (ISV) in this unit is a DOT-approved tank that carries a date code. This type of ISV must be re-certified or replaced every five years. To determine the date code of the ISV in your unit, remove the right side panel. It should be possible to read the date code stamped on the ISV. If the date code reads beyond the five-year limit, replace The Tank (you will need to strip the fittings and valves from the old tank).
Have read and understood the contents of this manual. The Series 17700A/17701A is used for R-12 vehicles and the Series 1/ 34704 is used for R-134a vehicles.
For the complete tank with all components see RA20089.