---
product_id: 18895190
title: "20340 Mini-Vent Air Admittance Valve"
brand: "weld-on"
price: "¥9574"
currency: JPY
in_stock: null
reviews_count: 8
url: https://www.desertcart.jp/products/18895190-20340-mini-vent-air-admittance-valve
store_origin: JP
region: Japan
---

# Fits 1.5" & 2" pipes Operates -40°F to 150°F Exclusive vermin protection 20340 Mini-Vent Air Admittance Valve

**Brand:** weld-on
**Price:** ¥9574
**Availability:** ❌ Out of Stock

## Summary

> 🚿 Elevate your plumbing game—vent smart, live fresh!

## Quick Answers

- **What is this?** 20340 Mini-Vent Air Admittance Valve by weld-on
- **How much does it cost?** ¥9574 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/18895190-20340-mini-vent-air-admittance-valve)

## Best For

- weld-on enthusiasts

## Why This Product

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

## Key Features

- • **Odor & Gas Barrier:** Gravity-sealed valve prevents sewer gases from invading your space, ensuring fresh air always.
- • **Bug-Proof Innovation:** Exclusive vermin protection system keeps pests and debris out, maintaining system integrity.
- • **Compact & Versatile Fit:** Seamlessly integrates with 1-1/2" or 2" piping for flexible installation.
- • **High Capacity Ventilation:** Supports up to 160 DFUs on branches and 24 DFUs on stacks—perfect for single or grouped fixtures.
- • **Extreme Temperature Resilience:** Reliable performance from -40°F to 150°F, built to withstand diverse environments.

## Overview

The Studor 20340 Mini-Vent Air Admittance Valve with ABS Adapter is a compact, high-capacity plumbing solution designed for 1-1/2" or 2" piping. It prevents loss of water seals and blocks sewer odors by automatically admitting air only when needed. Rated for extreme temperatures (-40°F to 150°F) and featuring an exclusive vermin protection system, it’s ideal for residential and commercial single or grouped fixtures, delivering efficient ventilation without roof penetrations.

## Description

Studor 20340 Mini-Vent Air Admittance Valve with ABS Adapter, 1-1/2- or 2-Inch Connection

## Features

- Compact air admittance valve with ABS adapter
- Ideal for a single fixture or group of fixtures; capacity of 160 DFUs (drain fixture units) on a branch and 24 DFUs on a stack
- Creates ventilation that prevents the loss of water seals in traps; uses gravity to automatically close seal and prevent circulation of unpleasant bathroom or drain odors
- Fits 1-1/2- and 2-inch piping; temperature rating of -40°F to 150°F (-40°C to 65.6°C); complies to ANSI/ASSE 1050 and 1051; this style air admittance valve is not recognized as a mechanical vent in the International Building Code
- Exclusive vermin protection system keeps out bugs and foreign objects

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Material | Acrylonitrile Butadiene Styrene |
| Brand | WELD-ON |
| Item dimensions L x W x H | 3.5 x 3.5 x 6 inches |
| Inlet Connection Size | 1.5 Inches |
| Outlet Connection Type | NPT |
| Number of Ports | 2 |
| Outlet Connection Size | 2 Inches |
| Global Trade Identification Number | 00764651203400 |
| Manufacturer | IPS Corporation |
| UPC | 764651203400 |
| Part Number | 25053 |
| Item Weight | 3.52 ounces |
| Product Dimensions | 3.5 x 3.5 x 6 inches |
| Item model number | 20340 |
| Size | 1-1/2- or 2-Inch Connection |
| Style | ABS Adapter |
| Item Package Quantity | 1 |
| Measurement System | inch |
| Included Components | 1 |
| Batteries Included? | No |
| Batteries Required? | No |

## Product Details

- **Material:** Acrylonitrile Butadiene Styrene
- **Brand:** WELD-ON
- **Item dimensions L x W x H:** 3.5 x 3.5 x 6 inches
- **Inlet Connection Size:** 1.5 Inches
- **Outlet Connection Type:** NPT
- **Number of Ports:** 2
- **Outlet Connection Size:** 2 Inches
- **Global Trade Identification Number:** 00764651203400
- **Manufacturer:** IPS Corporation
- **UPC:** 764651203400

## Images

![20340 Mini-Vent Air Admittance Valve - Image 1](https://m.media-amazon.com/images/I/71xav1NOrJL.jpg)
![20340 Mini-Vent Air Admittance Valve - Image 2](https://m.media-amazon.com/images/I/81Lei6Mp0YL.jpg)
![20340 Mini-Vent Air Admittance Valve - Image 3](https://m.media-amazon.com/images/I/71ro+s9nNoL.jpg)
![20340 Mini-Vent Air Admittance Valve - Image 4](https://m.media-amazon.com/images/I/810iNOlaRPL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: Why is this product listed under electronics > computers&accessories > networkingproducts > networkadapters > powerlinenetworkadapters**
A: If you plug this into your pc, it will free up hard drive admittance and the network will all speed up..  but the adaptor hasent been invented yet, guess the manufacturers have high hopes..

**Q: will the threads screw into a 1 1/2 threaded fitting?**
A: Yes, this screws directly into a 1 1/2" pipe threading. It also comes with an adapter for a 2" pipe.

**Q: what is life span for mini vent**
A: We just replaced two, both had replaced vents that were about 8 years old.

**Q: Are these suitable for exterior vent pipes?**
A: My understanding is they are only for use inside. They eliminate the need to connect new fixtures to the main stack.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Excellent and effective product!
*by S***Y on December 15, 2024*

Not need to cut a hole in your roof anymore. Never smelled anything in the past 2 years since the installation.

### ⭐⭐⭐⭐⭐ Fixed our problem
*by H***K on February 14, 2025*

Quality product and brand. Previously, we purchased a off brand, cheaper vent from our local hardware. That valve only worked 50% and for 6 months. This valve immediately allowed the proper air flow which resulted in drain emptying. Easy installation.

### ⭐⭐⭐⭐⭐ Worked Perfectly
*by K***S on November 30, 2024*

Easy to install and worked perfectly.

## Frequently Bought Together

- Studor 20340 Mini-Vent Air Admittance Valve with ABS Adapter, 1-1/2- or 2-Inch Connection
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- Studor 20346 Redi-Vent Air Admittance Valve with PVC Adapter, White, 1-1/2- or 2-Inch Connection

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**Shop now:** [https://www.desertcart.jp/products/18895190-20340-mini-vent-air-admittance-valve](https://www.desertcart.jp/products/18895190-20340-mini-vent-air-admittance-valve)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-01-23*