For testing and adjusting the pressure cushion of diaphragm expansion vessels of heating and oil supply systems, specially for systems with test valves which are not easily accessible.
Test and refill set consisting of a rigid, 200 mm long test lance with test head for pressing against the test valve of the expansion vessel and a ball valve with 7/16-28 UNEF thread for vessel filler can and a test pressure gauge ⌀ 40 mm, 0/4 bar. During testing and refilling, the fitting is pressed against the test valve.
