So can this vent inside a basement with no odor? We bought a house that has zero roof vents. Can this be used in place of those?

Don't think I 'd iinstall it in the basement. It needs to be above the fixture(s) that it vents. I've used smaller AAVs for indivuaul fixtures and placed them under the cabinet/sink or in the wall. The larger AAVs are desgined to handle several fixtures and replace the need for a large vent that penetrates the roof. These I've placed in the attack (below the roof but inside the building) and have not had any problems.

How long does one of these last until it needs to be replaced? Is there a way to tell if it has failed besides escaped sewer gas smell?

Package shows limited lifetime warranty. I assume when you smell sewer gasses, it has failed, but I really don't expect it to fail. All I know, is that it works and so far, I'm very pleased with the performance.

Does it come with a push-fit connector donut (wide o-ring) for connecting to inside of 4" pipe? Shown on spec sheet, but not for item.

No… just the item. Fits inside 4” sch 40 PVC coupling or 4” Fernco rubber coupling

Is it acceptable to use a rubber boot?

This goes INSIDE the attic. No boot needed.

20302 Maxi Vent 3 Inch To 4 Inch Air Admittance

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Description

🌟 Elevate your plumbing game—vent smarter, not harder!

COMPACT FOOTPRINT - Space-saving dimensions fit seamlessly into any plumbing setup, perfect for modern renovations.
ODOR CONTROL READY - Optional replaceable carbon filter reduces unpleasant drainage odors, keeping your space fresh.
CERTIFIED RELIABILITY - Meets rigorous ASSE, NSF, and IAPMO standards for trusted, professional-grade plumbing solutions.
SLEEK DURABLE DESIGN - Crafted from high-grade ABS plastic for long-lasting, maintenance-free performance.
MAXIMIZE VENT EFFICIENCY - Handles up to 500 Drain Fixture Units, ensuring flawless pressure equalization without roof penetrations.

The Studor 20302 Maxi-Vent is a compact, ABS plastic air admittance valve designed to vent up to 500 DFUs, eliminating the need for costly roof penetrations. Certified to multiple industry standards, it ensures reliable pressure equalization in drainage systems while optionally reducing odors with a replaceable carbon filter. Ideal for professional-grade plumbing installations seeking efficiency and sleek integration.

Specifications

ASIN	B000NID704
Batteries Included?	No
Batteries Required?	No
Best Sellers Rank	#95,787 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #12 in Diaphragm Valves
Color	White
Customer Reviews	4.6 4.6 out of 5 stars (193)
Date First Available	September 9, 2006
Included Components	IPS STUDOR MAXI VENT
Item Package Quantity	1
Item Weight	8.8 ounces
Item model number	GIDDS-301050
Manufacturer	Alfi
Material	Abs,Plastic
Part Number	GID-301050
Product Dimensions	3.5 x 3.5 x 6 inches
Size	5-1/4 inche

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€ 103.30

Duties & taxes included

In stock

Sold byAmazon ItalyDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Italy.

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20302 Maxi-Vent 3-Inch to 4-Inch Air Admittance Valve

Description

Specifications

Common Questions