British Spares British Spares
 
Anti-Drain Valve

Anti-Drain Valve

Wet sumping can be a problem with separate oil tank machines. If the bike is left to stand for a few days, the sump fills with oil, especially with gear type oil pumps, such as the Norton twins. This Anti-Drain Valve sits in-line close to the oil tank, preventing draining to the sump. It uses a steel ball held lightly under spring pressure against a seating. When the oil pump is working the ball lifts easily off its seating & allows the oil to flow. Fits any oil feed pipe of approximately 3/8" internal diameter.

Oil Feed Anti-Drain Valve. No:ADV