Vetus Anti-Siphon Valve maintenance on a Volvo MD2020D engine installed in a Bavaria 32 

How to disassemble, clean and - if necessary - replace the valve component on a Vetus anti-siphon valve on the raw water side of the engine's cooling system. Correct functioning and correct installation of the anti-siphon valve will prevent any risk of your cooling system resulting in seawater flooding into your boat.