---
product_id: 374275131
title: "Studor 20302 Maxi-Vent 3-Inch to 4-Inch Air Admittance Valve"
brand: "studor"
price: "€ 156.91"
currency: EUR
in_stock: false
reviews_count: 5
category: "Studor"
url: https://www.desertcart.ie/products/374275131-studor-20302-maxi-vent-3-inch-to-4-inch-air
store_origin: IE
region: Ireland
---

# Vents up to 500 DFUs Fits 3" to 4" pipes Exclusive vermin protection Studor 20302 Maxi-Vent 3-Inch to 4-Inch Air Admittance Valve

**Brand:** studor
**Price:** € 156.91
**Availability:** ❌ Out of Stock

## Summary

> 💨 Elevate your plumbing game—vent smarter, live fresher!

## Quick Answers

- **What is this?** Studor 20302 Maxi-Vent 3-Inch to 4-Inch Air Admittance Valve by studor
- **How much does it cost?** € 156.91 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/374275131-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

- • **Stay Fresh & Protected:** Exclusive vermin protection system keeps your space hygienic and odor-free.
- • **Simplify Plumbing Design:** Eliminates costly roof penetrations, expanding architectural freedom and reducing fire-stopping needs.
- • **Built to Last with Safety:** Constructed from durable ABS plastic and backed by a limited lifetime warranty for peace of mind.
- • **Maximize Venting Efficiency:** Handles up to 500 drainage fixture units for powerful, reliable air admittance.
- • **Universal Pipe Compatibility:** Seamlessly fits both 3-inch and 4-inch PVC or ABS pipes to suit your system.

## Overview

The Studor 20302 Maxi-Vent is a high-performance air admittance valve designed for 3" to 4" pipe systems, capable of venting up to 500 drainage fixture units. Made from durable ABS plastic and compliant with multiple industry standards, it replaces complex roof venting with a compact, vermin-protected solution that simplifies plumbing installations while ensuring odor-free environments. Ideal for residential and commercial applications, it comes with a limited lifetime warranty.

## Description

The Studor Maxi-VentThe Studor Maxi-Vent fits piping systems of 80mm (3") and 100mm (4") diameters. The Studor Maxi-Vent can vent up to 500 drainage fixture units (DFUs) in a stack application. The Studor Air Admittance Valve replaces expensive and complex plumbing vent systems that penetrate roofs of most homes, offices, factories and warehouses. The vent pipes allow air to enter the plumbing systems and equalize pressure when water drains out of the system--maintaining the "water seal" that prevents sewer gases from entering the building.Suitable for installation on PVC or ABS pipes.The Studor Maxi-Vent Features: Can be used as an individual branch, circuit or stack vent Will vent up to 500 DFUs on a stack Fits 3" and 4" pipe sizes Expands architectural design limits Reduces the number of fire-stopping applications Exclusive vermin protection system Limited lifetime warranty for replacement of defective valves

Review: Perfect stink pipe
Review: Supi

## 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

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000NID704 |
| Best Sellers Rank | #288,637 in Home Improvement ( See Top 100 in Home Improvement ) #9 in Roof Vents |
| Country of Origin | USA |
| Item Dimensions LxWxH | 8.9 x 8.9 x 15.2 Centimeters |
| Item Weight | 249 g |
| Item model number | GIDDS-301050 |
| Manufacturer | Alfi |
| Net Quantity | 1.0 Count |
| Product Dimensions | 8.89 x 8.89 x 15.24 cm; 249.48 g |

## Images

![Studor 20302 Maxi-Vent 3-Inch to 4-Inch Air Admittance Valve - Image 1](https://m.media-amazon.com/images/I/41EdVZ4aerL.jpg)
![Studor 20302 Maxi-Vent 3-Inch to 4-Inch Air Admittance Valve - Image 2](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

### ⭐⭐⭐⭐⭐ Review
*by S***P on 11 August 2023*

Perfect stink pipe

### ⭐⭐⭐⭐⭐ Review
*by W***N on 6 December 2025*

Supi

### ⭐⭐⭐⭐⭐ Review
*by S***L on 16 March 2025*

Fits and works perfectly

## 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 Ireland*
*Store origin: IE*
*Last updated: 2026-02-13*