---
product_id: 29387362
title: "Universal Air Gap for Water Softeners and Filters with 1/2-inch OD or 5/8-inch ID Inlet Port and 1-1/2-inch or 2-inch Drainpipe Outlet (AG100-001, MR. DRAIN, 34700)"
brand: "air gap international"
price: "¥10707"
currency: JPY
in_stock: true
reviews_count: 8
url: https://www.desertcart.jp/products/29387362-universal-air-gap-for-water-softeners-and-filters-with-1
store_origin: JP
region: Japan
---

# 12.5 GPM max flow rate Fits 1/2" OD & 5/8" ID inlet tubing Compatible with 1.5" & 2" drainpipes Universal Air Gap for Water Softeners and Filters with 1/2-inch OD or 5/8-inch ID Inlet Port and 1-1/2-inch or 2-inch Drainpipe Outlet (AG100-001, MR. DRAIN, 34700)

**Brand:** air gap international
**Price:** ¥10707
**Availability:** ✅ In Stock

## Summary

> 🚿 Keep it clean, quiet, and connected—flow with confidence!

## Quick Answers

- **What is this?** Universal Air Gap for Water Softeners and Filters with 1/2-inch OD or 5/8-inch ID Inlet Port and 1-1/2-inch or 2-inch Drainpipe Outlet (AG100-001, MR. DRAIN, 34700) by air gap international
- **How much does it cost?** ¥10707 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/29387362-universal-air-gap-for-water-softeners-and-filters-with-1)

## Best For

- air gap international enthusiasts

## Why This Product

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

## Key Features

- • **Splash-Free High Flow:** Handles up to 12.5 GPM without a drop escaping—dry and clean every time.
- • **Built-In Splash Guards:** Innovative splash shield design keeps your space spotless and noise minimal during peak flow.
- • **Multi-Connection Ready:** Supports up to 3 simultaneous water softener/filter discharges on one drain line—maximize your setup.
- • **Quiet & Secure Drainage:** Optimized for silent operation with elbow and flow deflector options to eliminate splashback noise.
- • **Universal Fit Flexibility:** Seamlessly connects 1/2" PVC, 5/8" tubing, and multiple standpipe sizes for ultimate compatibility.

## Overview

The AG100-001 Universal Air Gap by MR. DRAIN is a high-performance plumbing solution designed for water softeners and filters. It supports a maximum flow rate of 12.5 gallons per minute while preventing splash outside the air gap. Compatible with 1/2-inch OD or 5/8-inch ID inlet tubing and 1.5- or 2-inch drainpipes, it offers versatile installation options including multi-unit setups. Constructed from durable plastic and compliant with UPC, IPC, and NSF standards, it ensures secure, splash-free, and quiet drainage for both residential and commercial use.

## Description

The AG100-001 Universal Air Gap is designed to provide an effective way of connecting water softeners and water filters to 1-1/2 and 2-inch drain lines. MR. DRAIN air gap’s maximum flow rate is 12.5 gallons per minute (GPM). The maximum flow rate through an air gap is the highest flow rate at which water does not splash outside of an air gap. At maximum flow rate, the air gap is dry on the outside. The AG100-001 features a single inlet port that connects 1/2-inch piping or 5/8-inch tubing from a water softener or filter to the drain line. The unique feature of this air gap is able to accommodate 1-1/2-inch, and 2-inch standpipe drains with ease. Also, a unique design of this air gap enables the installation of multiple air gaps into the same drain connection. Up to three AG100-001s can be installed into the same drainpipe to provide a total of three simultaneous water discharge connections. The AG100-001 uses a special plastic material that provides a secure connection between piping, tubing, and drain line. The AG100-001 air gap is listed by UPC and in compliance with IPC and NSF standards. Optional accessories are available for the AG100-001 (Note: ET170-001 through -008 connect to ET170-020).

## Features

- ❤ FLOW RATE: MR. DRAIN air gap’s maximum flow rate is 12.5 gallons per minute (GPM). The maximum flow rate through an air gap is the highest flow rate at which water does not splash outside of an air gap. At maximum flow rate, the air gap is dry on the outside.
- ❤ EASY TO CONNECT: MR. DRAIN air gap (AG100-001) has 1/2-inch OD inlet port for direct 1/2-inch PVC pipe connection. The 1/2-inch inlet accommodates any 1/2-inch slip joint adapters. The adapters include a threaded end, barb connection, and a quick connect for PEX tubing. Also, the inlet accommodates 5/8-inch OD tubing that can be directly inserted into the inlet. For tubing to stay in place, it needs to be attached to a support structure within 12-18 inches from the inlet port.
- ❤ STANDPIPE CONNECTION: MR. DRAIN air gap (AG100-001) inserts directly into the 1-1/2-inch and 2-inch standpipes. The body of the air gap provides stops to assure secure placement. This air gap can be used with plastic or metal standpipes. If needed, it can be glued in place with plastic standpipes using regular PVC adhesive. The air gap outlet is designed to pass up to 15 gallons per minute. The optimum recommended flow rate is 7 gallons per minute.
- ❤ SPLASH PROTECTION: The AG100-001 air gap uses splash guards to assure a completely dry operation. Splash guards are an integral part of the design and can be seen through the side air gap window. During water softener operation, an initial discharge surge can create splashing. Splash shield eliminates the possibility of water splashing outside of the air gap. When designing drainage for an air gap, makes sure that P-trap is located minimum 20-inches from the top of the standpipe.
- ❤ QUIET OPERATION: When water exits the air gap, depending on the design, it may flow directly into a P-trap. This can create splashing noise that may be objectionable. To avoid excessive noise, it is recommended to use 22 degrees elbow inline with standpipe to avoid direct drainage to P-trap. The pipe elbow should be located at least 12 inches from the air gap to eliminate splashback. If an elbow is not an option for your application, we can provide a flow deflector.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Size | 1 Count (Pack of 1) |
| Material | Plastic |
| Brand | AIR GAP INTERNATIONAL |
| Color | Gray |
| Connector Type | Elbow |
| Thread Size | 1/2" |
| Thread Type | NPT |
| Item Weight | 1.6 ounces |
| Number of Pieces | 1 |
| Manufacturer | AIR GAP INTERNATIONAL |
| UPC | 854628005356 |
| Part Number | AG100-001 |
| Package Dimensions | 5.91 x 5.04 x 1.93 inches |
| Item model number | AG100-001 |
| Is Discontinued By Manufacturer | No |
| Style | Universal air gap |
| Item Package Quantity | 1 |
| Flow Rate | 12.5 Gallons Per Minute |
| Usage | Commercial/Residential |
| Batteries Included? | No |
| Batteries Required? | No |

## Product Details

- **Size:** 1 Count (Pack of 1)
- **Material:** Plastic
- **Brand:** AIR GAP INTERNATIONAL
- **Color:** Gray
- **Connector Type:** Elbow
- **Thread Size:** 1/2"
- **Thread Type:** NPT
- **Item Weight:** 1.6 ounces
- **Number of Pieces:** 1
- **Manufacturer:** AIR GAP INTERNATIONAL

## Images

![Universal Air Gap for Water Softeners and Filters with 1/2-inch OD or 5/8-inch ID Inlet Port and 1-1/2-inch or 2-inch Drainpipe Outlet (AG100-001, MR. DRAIN, 34700) - Image 1](https://m.media-amazon.com/images/I/61o8oFmvbWL.jpg)
![Universal Air Gap for Water Softeners and Filters with 1/2-inch OD or 5/8-inch ID Inlet Port and 1-1/2-inch or 2-inch Drainpipe Outlet (AG100-001, MR. DRAIN, 34700) - Image 2](https://m.media-amazon.com/images/I/61SqzFqkAQL.jpg)
![Universal Air Gap for Water Softeners and Filters with 1/2-inch OD or 5/8-inch ID Inlet Port and 1-1/2-inch or 2-inch Drainpipe Outlet (AG100-001, MR. DRAIN, 34700) - Image 3](https://m.media-amazon.com/images/I/61ID-V2dbBL.jpg)
![Universal Air Gap for Water Softeners and Filters with 1/2-inch OD or 5/8-inch ID Inlet Port and 1-1/2-inch or 2-inch Drainpipe Outlet (AG100-001, MR. DRAIN, 34700) - Image 4](https://m.media-amazon.com/images/I/71rLVYDME+L.jpg)
![Universal Air Gap for Water Softeners and Filters with 1/2-inch OD or 5/8-inch ID Inlet Port and 1-1/2-inch or 2-inch Drainpipe Outlet (AG100-001, MR. DRAIN, 34700) - Image 5](https://m.media-amazon.com/images/I/71SGSmNLCoL.jpg)

## Questions & Answers

**Q: is this an approved air break**
A: Yes, this air gap has a splash guard to ensure a completely dry operation.  The splash guard maintains air gap efficiency and, at the same time, contain water droplets. The air gap can sustain a 7Gal per min flow rate. It is UPC listed, and IPC and NSF tested. All other parameters remain the same.

**Q: Do I glue the 1/2” cpvc drain line to the device or does it just sit in there by gravity?**
A: The air gap has a groove which slides down over the top of your stand pipe. Basically, the drain portion goes inside your stand pipe and there is a mounting part that goes outside your stand pipe. It is very rigid once slid into place.

**Q: What standard *specifically* is it listed to? My plumbing inspector is requiring me to find out.**
A: Please look at our website (airgap . com), Compliance tab, UPC certifications for all of the certifications. Standard: IAPMO PS 65-2019

## Customer Reviews

### ⭐⭐⭐⭐⭐ works and fits
*by J***S on March 5, 2022*

Fits into my 1 1/2" laundry stack, allowing existing washer to drain and my newly added water softener to share that same pipe. Works and fits nicely.

### ⭐⭐⭐⭐⭐ We painted the Inlet Port along with the other pvc piping pieces. Looks great and works well.
*by A***R on May 2, 2019*

I like how it will fit two different size piping. Works well for the water softener.

### ⭐⭐⭐⭐⭐ Peace of mind
*by T***R on December 14, 2020*

I used this air gap to drain my water softener into the washing machine stand pipe. Fit my application perfectly and now I don't need to worry about my washing machine water backsiphoning into my softener.

## Frequently Bought Together

- Universal Air Gap for Water Softeners and Filters with 1/2-inch OD or 5/8-inch ID Inlet Port and 1-1/2-inch or 2-inch Drainpipe Outlet (AG100-001, MR. DRAIN, 34700)
- Water Softener Air Gap for installation in Washing Machine box with 2-inch Drainpipe (61-S, GAP-IT, AG140-001)
- Water Filter/Softener Air Gap With 3/4-inch Female Threaded Inlet for Use With 1-1/2-inch or 2 inches (with coupler) Standpipe (ET115-002, G-175, DLA-G15)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-01-22*