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

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¥20766

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Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

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

BUILT TO LAST - Constructed from high-grade ABS plastic for long-lasting durability and corrosion resistance.
COMPACT EASY INSTALL - Streamlined 3.5 x 3.5 x 6 inch design fits seamlessly into any DWV system, saving space and installation time.
ODOR CONTROL INNOVATION - Includes a replaceable carbon filter to effectively reduce unpleasant plumbing odors.
CODE COMPLIANT CONFIDENCE - Meets rigorous ASSE, NSF, IAPMO, and Intertek standards for reliable, professional-grade performance.
MAXIMIZE VENTING EFFICIENCY - Supports up to 500 DFUs on stack applications, ensuring optimal air admittance without roof penetrations.

The 20302 Maxi-Vent Air Admittance Valve is a professional-grade plumbing solution designed to equalize pressure in DWV systems by allowing air intake without costly roof penetrations. Engineered from durable ABS plastic and compliant with top industry standards, it vents up to 500 DFUs on stack applications and features a replaceable carbon filter to minimize odors. Compact and easy to install, it’s the go-to valve for efficient, code-compliant venting.

Specifications

ASIN	B000NID704
Best Sellers Rank	#100,758 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #4 in Filter Valves
Color	White
Customer Reviews	4.6 4.6 out of 5 stars (195)
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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¥20766

Duties & taxes included

In stock

Sold byAmazon JapanDelivered 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 Japan.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Sneha T.

Received my product in pristine condition. Great service overall.

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

Description

Specifications

Common Questions