VETUS Antisiphon valve AIRVENTV 13-32mm

If the point where the cooling water is injected into the exhaust is less than 15cm above the waterline, then when the engine is stopped, there is a risk that cooling water will siphon into the exhuast system and subsequently into the engine itself. Such siphoning may be prevented by fitting a Vetus air vent at least 40 cm above the waterline.

Type V has a reliable antisiphon pressure valve and is self contained. However, it requires periodic maintenance to prevent clogging with salf crystals