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.

Studor 20302 Maxi Vent 3 Inch To 4 Inch Air

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Description

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

EASY INSTALLATION - Fits 3- to 4-inch pipes, simplifying upgrades and new installations with minimal hassle.
ODOR CONTROL READY - Optional replaceable carbon filter reduces unpleasant plumbing odors for a fresher environment.
CERTIFIED RELIABILITY - Meets rigorous ASSE 10510 & NSF 14 standards for trusted, code-compliant performance.
COMPACT DURABLE DESIGN - Crafted from high-grade ABS plastic for long-lasting, maintenance-free operation.
MAXIMIZE VENT EFFICIENCY - Handles up to 500 Drain Fixture Units, ensuring flawless pressure equalization without roof penetrations.

The Studor 20302 Maxi-Vent is a high-performance air admittance valve designed for venting single fixtures, branches, or stacks up to 500 DFUs. Constructed from durable ABS plastic and certified to ASSE, IAPMO, and NSF standards, it eliminates costly roof penetrations while maintaining optimal drainage system pressure. Its compact design and optional odor-reducing carbon filter make it a must-have upgrade for modern, efficient plumbing systems.

Specifications

ASIN	B000NID704
Batteries Required?	No
Batteries included?	No
Best Sellers Rank	688,713 in DIY & Tools ( See Top 100 in DIY & Tools ) 5,757 in Central Heating System Accessories
Certification	ASSE, IAPMO, NSF
Colour	White
Customer Reviews	4.6 4.6 out of 5 stars (189)
Date First Available	15 Sept. 2013
Guaranteed software updates until	unknown
Item Package Quantity	1
Item Weight	249 g
Item model number	GIDDS-301050
Manufacturer	Alfi
Material	Acrylonitrile Butadiene Styrene
Part Number	GID-301050
Product Dimensions	8.89 x 8.89 x 15.24 cm; 249.48 g
Size	5-1/4 inche

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

Description

Specifications

Common Questions