Aqualine Air Admittance Valve
Aqualine Air Admittance Valve (AV3240) – Venting Without External Pipes
An air admittance valve (AAV) is a one-way mechanical valve that allows air to enter a waste plumbing system to prevent negative pressure and siphoning, without requiring an external vent pipe through the roof.
In caravan self-containment systems, an AAV allows your grey water waste system to function correctly and drain freely, without the need to run a vent pipe outside the vehicle.
Key Features
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Eliminates External Vent Requirement Provides necessary venting without a roof or external vent penetration
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Prevents Siphoning & Negative Pressure Allows waste to drain correctly without gurgling or slow drainage
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Aqualine AV3240 Model A trusted, proven AAV for caravan plumbing
NZ Self-Containment Compatible Suitable for NZ-compliant self-containment systems
Brand: Aqualine
Model: AV3240
Type: Air Admittance Valve (AAV)
Application: Caravan grey water / self-containment waste venting
What is an air admittance valve used for?
An air admittance valve allows air to enter the plumbing system to balance pressure while preventing sewer gases and odours from escaping into the caravan or living space.
Why is this important for caravans?
In caravans and motorhomes, proper venting is essential for self-containment systems. An AAV helps maintain smooth drainage and prevents unpleasant smells from waste tanks.
What pipe sizes does this valve fit?
This Aqualine valve is designed to suit DN32 and DN40 pipe sizes, making it compatible with common caravan plumbing systems.
How does an air admittance valve work?
The valve opens when negative pressure occurs in the pipe, allowing air in. Once pressure equalises, it closes to stop gases from escaping.
Can it be used in a self-containment setup?
Yes, air admittance valves are commonly used in certified self-containment systems to ensure proper venting and compliance with plumbing requirements.
Is it easy to install?
Yes, it is designed to be glued into place using standard plumbing methods, making installation straightforward for DIY setups or professional installs.
Does it stop bad smells?
Yes, one of its main functions is to prevent sewer gases and odours from escaping into your caravan or motorhome.
Can it be used outside?
While it has UV protection, air admittance valves are typically installed inside protected areas such as under sinks or inside cabinetry for best performance.
Is it compliant with New Zealand standards?
Yes, Aqualine air admittance valves comply with relevant NZ plumbing standards, including AS/NZS 4936.
Where should it be installed?
It is usually installed above the trap in a plumbing system, allowing proper airflow while staying clear of potential water levels.
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