---
product_id: 13803038
title: "20302 Maxi-Vent 3-Inch to 4-Inch Air Admittance Valve"
brand: "studor"
price: "993 kr"
currency: DKK
in_stock: true
reviews_count: 12
category: "Studor"
url: https://www.desertcart.dk/products/13803038-20302-maxi-vent-3-inch-to-4-inch-air-admittance
store_origin: DK
region: Denmark
---

# Compact 3.5x3.5x6 inch size Vents up to 500 DFU Durable ABS plastic build 20302 Maxi-Vent 3-Inch to 4-Inch Air Admittance Valve

**Brand:** studor
**Price:** 993 kr
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** 20302 Maxi-Vent 3-Inch to 4-Inch Air Admittance Valve by studor
- **How much does it cost?** 993 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/13803038-20302-maxi-vent-3-inch-to-4-inch-air-admittance)

## Best For

- studor enthusiasts

## Why This Product

- Trusted studor brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Last:** Constructed from high-grade ABS plastic for long-lasting durability and corrosion resistance.
- • **Compact & Discreet:** Sleek 3.5 x 3.5 x 6 inch design fits seamlessly into any plumbing setup without bulky vent stacks.
- • **Certified Performance:** Meets rigorous ASSE, NSF, IAPMO, and Intertek standards for trusted, professional-grade reliability.
- • **Odor Control Innovation:** Optional replaceable carbon filter reduces unpleasant plumbing odors for a fresher environment.
- • **Maximize Vent Efficiency:** Handles up to 500 DFUs on stack vents, ensuring optimal air admittance without roof penetrations.

## Overview

The 20302 Maxi-Vent Air Admittance Valve is a compact, ABS plastic valve designed to equalize pressure in DWV systems by allowing air in as water drains. It supports up to 500 DFUs on stack vents, eliminating the need for costly roof penetrations and bulky vent piping. Certified to multiple industry standards, it offers durability, odor control options, and a sleek profile ideal for modern plumbing solutions.

## Description

Product Description Allow air to enter DWV systems to equalize pressure when water drains out of the system; eliminate the need for costly roof penetrations and vent piping. 1ATD5 vents up to 500 DFUs on a stack; 1ATD6 vents up to 160 DFUs on a branch and up to 24 DFUs on a stack. 15W940 has a replaceable cabon filter to reduce plumbing drainage system odors. From the Manufacturer Allow air to enter DWV systems to equalize pressure when water drains out of the system; eliminate the need for costly roof penetrations and vent piping. 1ATD5 vents up to 500 DFUs on a stack; 1ATD6 vents up to 160 DFUs on a branch and up to 24 DFUs on a stack. 15W940 has a replaceable cabon filter to reduce plumbing drainage system odors

Review: As advertised - Fits and works perfectly
Review: Great product - Eliminated the need for the vent stack through the roof. Since my roof leaked at the vent stack I decided to cut stack down to attic level and have the roofers re-roof and delete stack exposure. Works perfectly.

## Features

- For use with: Venting Single Fixture, Individual Branch, Circuit Vent Or Stack Type Application Up To 500 DFU
- Material of Construction: ABS Plastic
- Standards: ASSE Performance Standard 10510 And 1051, NES-592, NSF Standard 14, IAPMO, File No C-3803, ITS Intertek Testing Services
- Package Dimensions : 5.5" L x 5.5" W x 8" H

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000NID704 |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #61,834 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #4 in Diaphragm Valves |
| Color | White |
| Customer Reviews | 4.5 4.5 out of 5 stars (190) |
| 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 |

## Images

![20302 Maxi-Vent 3-Inch to 4-Inch Air Admittance Valve - Image 1](https://m.media-amazon.com/images/I/51Zq1PXutjL.jpg)

## Questions & Answers

**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?**
A: 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?**
A: 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.**
A: 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?**
A: This goes INSIDE the attic. No boot needed.

## Customer Reviews

### ⭐⭐⭐⭐⭐ As advertised
*by S***L on March 16, 2025*

Fits and works perfectly

### ⭐⭐⭐⭐⭐ Great product
*by K***E on July 26, 2024*

Eliminated the need for the vent stack through the roof. Since my roof leaked at the vent stack I decided to cut stack down to attic level and have the roofers re-roof and delete stack exposure. Works perfectly.

### ⭐⭐⭐⭐ I
*by R***K on August 8, 2018*

Ease of installation

## 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

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*Product available on Desertcart Denmark*
*Store origin: DK*
*Last updated: 2026-02-06*