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Desert Online General Trading LLC

Dubai, United Arab Emirates

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

Q: 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.

Q: 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.

Q: 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

Q: Is it acceptable to use a rubber boot?

This goes INSIDE the attic. No boot needed.

Product ID: 370093403

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📏Fits 3" to 4" vents seamlessly

⚙️Durable ABS plastic build

🛡️Certified to top industry standards

Frequently Bought Together

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

Studor 20341 Mini-Vent Air Admittance Valve with PVC Adapter, 1-1/2- or 2-Inch Connection

Oatey Sure-Vent 1-1/2 in.–2 in. 160 Branch, 24 Stack DFU Air Admittance Valve with White PVC Sch. 40 Adapter

Description

🚀 Upgrade your airflow game with Maxi-Vent precision!

ROBUST ABS CONSTRUCTION - Crafted from high-grade ABS plastic ensuring long-lasting durability and resistance.
LIGHTWEIGHT COMPACT DESIGN - Weighs just 249g with a sleek 5-1/4 inch profile for easy handling and installation.
EFFORTLESS VENT COMPATIBILITY - Seamlessly adapts from 3-inch to 4-inch vent sizes for versatile installation.
SINGLE FIXTURE TO STACK READY - Perfect for venting single fixtures, branch circuits, or stack applications up to 500 DFU.
INDUSTRY LEADING CERTIFICATIONS - Meets ASSE 10510 & 1051, NSF 14, IAPMO, and ITS Intertek standards for guaranteed reliability.

The 20302 Maxi-Vent Air Admittance Valve by Alfi is a lightweight, durable ABS plastic valve designed to fit 3- to 4-inch vent pipes. Certified to rigorous industry standards including ASSE, NSF, and IAPMO, it supports venting for single fixtures, branch circuits, or stack applications up to 500 DFU, ensuring reliable and efficient air admittance in plumbing systems.

Specifications

Manufacturer	Alfi
Part number	GID-301050
Item Weight	249 g
Product Dimensions	8.89 x 8.89 x 15.24 cm; 249.48 g
Item model number	GIDDS-301050
Size	5-1/4 inche
Color	White
Material	Acrylonitrile Butadiene Styrene
Item Package Quantity	1
Specification met	ASSE, IAPMO, NSF
Included components	IPS STUDOR MAXI VENT
Batteries Required?	No

Have a Question? See What Others Asked

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?

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?

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.

Is it acceptable to use a rubber boot?

Common Questions

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