---
product_id: 13803038
title: "Studor 20302 Maxi-Vent 3-Inch to 4-Inch Air Admittance Valve"
brand: "studor"
price: "€ 118.36"
currency: EUR
in_stock: false
reviews_count: 12
url: https://www.desertcart.it/products/13803038-studor-20302-maxi-vent-3-inch-to-4-inch-air
store_origin: IT
region: Italy
---

# Compact 3-4 inch fitting Vents up to 500 DFUs Durable ABS plastic build Studor 20302 Maxi-Vent 3-Inch to 4-Inch Air Admittance Valve

**Brand:** studor
**Price:** € 118.36
**Availability:** ❌ Out of Stock

## Summary

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

## Quick Answers

- **What is this?** Studor 20302 Maxi-Vent 3-Inch to 4-Inch Air Admittance Valve by studor
- **How much does it cost?** € 118.36 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/13803038-studor-20302-maxi-vent-3-inch-to-4-inch-air)

## 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

- • **Certified Reliability:** Meets rigorous ASSE, NSF, and IAPMO standards for trusted, professional-grade plumbing solutions.
- • **Sleek, Durable Design:** Crafted from high-grade ABS plastic for long-lasting, maintenance-free performance.
- • **Odor Control Innovation:** Optional replaceable carbon filter reduces unpleasant plumbing odors for a fresher environment.
- • **Maximize Vent Efficiency:** Handles up to 500 Drain Fixture Units, ensuring flawless pressure equalization.
- • **Space-Saving Installation:** Fits seamlessly into 3-4 inch vent pipes, eliminating bulky roof penetrations.

## Overview

The Studor 20302 Maxi-Vent is a compact, ABS plastic air admittance valve designed to vent up to 500 DFUs, eliminating the need for roof penetrations. Certified to multiple industry standards, it ensures reliable pressure equalization in drainage systems while optionally reducing odors with a replaceable carbon filter. Perfect for professional-grade, space-conscious plumbing installations.

## 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 | #90,664 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #8 in Diaphragm Valves |
| Color | White |
| Customer Reviews | 4.6 4.6 out of 5 stars (191) |
| 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

![Studor 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 Italy*
*Store origin: IT*
*Last updated: 2026-03-10*