ID
975688
$ 162.99
1-2 weeks delivery time
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The Vetus ASD38V Anti-Syphon Device is designed for Ø38 mm hoses and is ideal for marine toilets or holding tanks located below the waterline. With compact dimensions of 129 × 48 × 107 mm and a 360° rotating air bleed connection, it prevents vacuum formation and reduces syphon risk while allowing tool-free valve maintenance.
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Vetus ASD38V Anti-Syphon Device with Valve for Ø38 mm Marine Hose
The Vetus ASD38V anti-syphon device is engineered to prevent vacuum formation and syphon effects in marine systems using Ø38 mm hoses. It is particularly suited for toilets and holding tanks installed below the waterline, where uncontrolled water ingress must be prevented. Made from durable synthetic materials, it is fully interchangeable with Vetus AIRVENT models due to matching fixing hole centres. The 360° rotating air bleed connection ensures flexible installation, and the valve can be serviced without removing the device.
Main Features
- Designed for marine systems using Ø38 mm internal hose diameters.
- Self-regulating valve vents only when required to prevent vacuum formation.
- Ideal for toilets and waste tanks positioned below the waterline.
- Fully interchangeable with AIRVENT models; identical mounting hole centres.
- Air bleed connection rotates 360° for optimal hose routing.
- Valve maintenance without removing the unit; no tools needed.
- Constructed from corrosion-resistant synthetic materials for low maintenance.
- Replacement valve sets (5 pieces) available as spare parts.
Applications
- Marine Engines: Helps prevent vacuum formation when the exhaust outlet is close to the waterline by equalizing pressure during engine shutdown.
- Toilet Systems: Prevents seawater syphoning into the toilet by automatically venting when negative pressure occurs.
- Holding Tanks: Suitable for waste tanks installed below the waterline to avoid syphon-related overflow.
Technical Specifications
Function Anti-syphon device with self-regulating valve Hose Connection Diameter 38 mm Length 129 mm Width 48 mm Height 107 mm Air Bleed Connection Rotates 360° Valve Servicing Tool-free; no removal required Compatibility Interchangeable with AIRVENT models
Installation Notes
- Mount the device vertically to ensure proper valve operation.
- Position the unit at a point where syphon risk exists—typically above the highest part of the line.
- Use the 360° rotating connector to align the breather hose correctly.
- Inspect the valve periodically; replacement sets are available for maintenance.
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