Nipple with built-in check valve 3000 - 10 mm Hose connection

Nipple with built-in check valve 3000 - 10 mm Hose connection Nipple with built-in check valve that lets air in when draining the water heater. Nipple with built-in check valve that lets air in when draining the water heater. Mounted on the outgoing nipple connection. Includes 500 mm hose for the air vent. Ø 10 mm hose connection. Fits Compact 3000 and 3010 up to serial no. 91458. AL-3000471 AL-3000571