Vent Cowl Weatherproof
Vent Cowls- 50mm
- 100mm
Improve tank ventilation
The Vent Cowl Weatherproof helps protect the quality of your rainwater by letting your tank “breathe” without letting mosquitoes and other nasties in. This is especially important if your inlet pipes are plumbed directly into your tank rather than opening to pour through your tank screen.
Clean and install with ease
The twist-off cap can be easily removed for cleaning, while the flange design makes it easy to fit and glue the Vent Cowl Weatherproof on top of your tank or toilet vent.
Vent Cowls help Secure your System by enclosing your rain harvesting to outside influences, including pollutants, insects and pests. Avoiding contamination keeps your water safer for use.
Manage Standing Water with a Rain Harvesting Vent Cowl by allowing your tank and rainwater to breath, reducing the negative effects of a system that can’t breath.
Learn more about the 4 pillars of designing a Rain Harvesting system.
The Rain Harvesting steps addressed:
Limit sources of contamination 
Plan for volume
Filter leaves and debris 
Divert the first flush
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Specifications
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Installation
- Depending on your chosen Vent Cowl Weatherproof model, use a 63mm (50mm Vent Cowl) or 121mm (100mm Vent Cowl) holesaw to cut the appropriate hole in your rainwater tank.
- Twist to remove the weatherproof cap from your vent cowl.
- Place silicon on the underside of the vent cowl flange, press it down onto the tank and screw the flange to the tank surface.
- Replace the weatherproof cap.
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Maintenance
When properly installed, your vent cowl should be maintenance-free.
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What's in the box?
- Vent Cowl Weatherproof
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Tools you might need
- Hole saw
- Silicone
- Screws
- Screwdriver
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Product FAQs
When would I use a weatherproof vs a standard vent cowl?
Both standard and weatherproof vent cowls allow fresh air to circulate within your rainwater tank. Weatherproof vent cowls incorporate a cap that shields the stainless steel screen from light (UV) and the weather. They can be used to provide a light (UV) and weather-proof vent on the top surface of your rainwater tank.
Do I need to use a vent cowl if I have a Maelstrom filter installed on my tank?
Vent cowls are optional for rainwater tanks with and without Maelstrom filters. However, the benefit of a vent cowl is that it will ensure the unrestricted flow of fresh air within your tank.
How do I install my chosen vent cowl product?
For detailed installation instructions, visit the Support page for your chosen product.
Can I use Blue Mountain Co vent cowls in standard plumbing applications such as toilets or portaloos?
Yes, refer to Blue Mountain Co Plumbing Vent Cowls
