Union Drycleaning 0804046 high side HVAC refrigeration pressure gauge for compatible Union, FMB, Realstar, and similar dry cleaning equipment. This oil-filled high-side gauge is used when servicing refrigeration circuits on matching dry cleaning machines. Use this replacement when the existing high-side gauge is damaged, unreadable, leaking, or no longer responding correctly. Verify part number 0804046, pressure range, connection type, refrigerant scale, and machine fitment before ordering. Contact Corbett Equipment if you need help confirming compatibility.