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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COP 613956

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Sold byAmazon ColombiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🌟 Elevate your plumbing game with Maxi-Vent — the silent hero your system deserves!

ODOR CONTROL READY - Optional replaceable carbon filter reduces unpleasant plumbing odors for a fresher environment
COST SAVING INSTALLATION - Eliminates need for roof penetrations and complex vent piping—streamline your setup
PREMIUM ABS CONSTRUCTION - Engineered for durability and long-lasting performance in your plumbing system
CERTIFIED QUALITY ASSURANCE - Complies with top industry standards including ASSE 10510, NSF 14, and IAPMO for peace of mind
MAXIMIZE VENTING EFFICIENCY - Supports up to 500 Drain Fixture Units for powerful pressure equalization

The 20302 Maxi-Vent Air Admittance Valve is a high-performance plumbing accessory designed to equalize pressure in DWV systems by venting up to 500 DFUs. Constructed from durable ABS plastic and certified to rigorous ASSE, NSF, and IAPMO standards, it simplifies installation by eliminating roof penetrations and vent piping. Ideal for single fixtures, branches, or stack applications, it also offers an optional carbon filter to reduce odors, making it a smart, efficient upgrade for modern plumbing systems.

Specifications

ASIN	B000NID704
ASIN	B000NID704
Batteries Included?	No
Batteries Required?	No
Best Sellers Rank	#89,218 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #235 in Registers, Grilles & Vents
Color	White
Customer Reviews	4.6 4.6 out of 5 stars (185)
Customer reviews	4.6 4.6 out of 5 stars (185)
Date First Available	15 September 2013
Date First Available	15 September 2013
Included components	IPS STUDOR MAXI VENT
Item Package Quantity	1
Item Weight	249 g
Item model number	GIDDS-301050
Item model number	GIDDS-301050
Manufacturer	Alfi
Manufacturer	Alfi
Material	Acrylonitrile Butadiene Styrene
Part number	GID-301050
Product Dimensions	8.89 x 8.89 x 15.24 cm; 249.48 g
Product Dimensions	8.89 x 8.89 x 15.24 cm; 249.48 g
Size	5-1/4 inche
Specification met	ASSE, IAPMO, NSF

Reviews

S**P

Needed

11.08.2023

W**N

Toll

Supi

6.12.2025

S**L

As advertised

16.03.2025

K**E

Great product

26.07.2024

E**T

Très bien

Qualité vs prix est super

23.10.2022

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