Page 96 - Vetus

AIRVENTS

Anti-siphoning
When the cooling water injection point is less than 6” (15 cm) above the waterline, the cooling system can siphon water through
the intake when the engine is turned off. Water can siphon into the exhaust system and even into the engine itself. This can be
prevented by using an air vent.

Type ASDV with pressure valve Type ASDH with ventilation hose

Type V Type H

Type ASDV with pressure valve

Less maintenance is needed
This air vent is made of synthetic material and is exchangeable with type AIRVENT due to the same fixing holes centres.
It has a silicone anti-siphon pressure valve and is self-contained.

Specifications
• Types ASDV and type AIRVENTV are suitable for hose connections with an internal diameter of Ø ½”, ¾”, 1” and 1¼”
(13, 19, 25 and 32 mm)
• Type ASD38V has a hose connection with an internal diameter of Ø 1½” (38 mm) and is ideal for toilets or holding tanks which
are installed below the waterline
Type ASDH with ventilation hose

Constant bleed of cooling water
This air vent has a hose connection to the outside of the hull and has a constant bleed of cooling water through the hose while the
engine is running. Type H comes with a skin fitting, hose clamps and 4 metres of hose.
Specifications
• Types ASDH and type AIRVENTH are suitable for Ø ½”, ¾”, 1” and 1¼” (13, 19, 25 and 32 mm) internal hose connections
• Type ASD38H has a Ø 1½” (38 mm) hose connection and is ideal for toilets or holding tanks which are installed below the
waterline

Type Ø Hose inch (mm)
ASDV Anti Syphon Device with Valve ½ / ¾ / 1 / 1¼ (13 / 19 / 25 / 32)
ASDH Anti Syphon Device with Hose ½ / ¾ / 1 / 1¼ (13 / 19 / 25 / 32)

ASDV

ASDH

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