AIR VENTS
Model ASD is interchangeable with type AIRVENT and has the same fixing hole centres.
It has the advantage that the air bleed connection rotates through 360°.
In addition, the valve can be maintained without removing the vent from the wall and no tools are required to do this.
For replacement, a set with 5 valves is available as a spare part.
Materials
Housing : All models made of synthetic material
Valve : Model ASD made of synthetic material
Model AIRVENT made of synthetic and stainless steel.
Mounting brackets are available for both types of air vent, to facilitate installation onto surfaces clad with sound insulation.
This mounting bracket is supplied with bolts, washers and self-locking nuts to mount the airvent.

With pressure valve
If the point where the cooling water is injected into the exhaust is less than 15 cms above the waterline, then when the engine is stopped, there is a risk that cooling water will siphon into the exhaust 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.
Two different models are available: type ASD and type AIRVENT.
Both models can be connected to hoses with internal diameters of ø 13, 19, 25 and 32 mm (½”, ¾”, 1” and 1¼” ). Version ASD38 connect to hose with internal diameter of ø 38 mm (1½”).