Air Gap International ET115-002: Water Filter/Softener Air Gap, 3/4 in Inlet, Standpipe Compatible

Overview

The ET115-002 universal air gap from AIR GAP INTERNATIONAL delivers a dependable, splash‑free solution for routing discharge from a water softener or filter to a 1-1/2 inch standpipe drain. Its enclosed design keeps the gap protected, helping to minimize splashes and spray while the system runs at varying flow rates. The unit is built for simple, straightforward installation and maintenance, so you can set it up with confidence in a variety of settings—from utility rooms to under-sink areas.

Designed for versatility, the ET115-002 accepts a 3/4 inch threaded inlet and can connect with rigid PVC pipes or flex tubing using appropriate adapters. It supports connections to 1-1/2 inch OD standpipes as well as 2 inch OD standpipes when used with couplers, making it suitable for many common plumbing configurations without extensive modification.

Key benefits

• Dry exterior at minimum and maximum flow—reducing splash during operation.
• Wide flow range (0.5 to 9 GPM) to accommodate different discharge conditions.
• 15 GPM standpipe flow capacity for steady drainage performance.
• 3/4 inch MIPT inlet accepts compatible PVC pipes or adapters for flexible setup.
• Compatibility with 1-1/2 inch or 2 inch standpipes using standard couplers.
• UPC and IPC listed, with lot-by-lot testing to ensure consistent quality.

Specification highlights and compatibility

• Inlet: 3/4 inch threaded PVC pipe or adapters
• Standpipe options: 1-1/2 inch or 2 inch OD with couplers
• Minimum flow rate: 0.5 GPM; Maximum flow rate: 9 GPM
• Flow capacity: 15 GPM through the air gap unit
• Materials and construction designed for easy mounting and maintenance
• Code listings: UPC and IPC

Usage and installation ideas

This air gap is well suited for homes and light commercial setups where a reliable air gap is required for drainage lines from water softeners or filtration systems. It can be pressure‑fit or glued to a plastic standpipe, and it installs to a 1-1/2 inch or 2 inch standpipe, depending on your drainage configuration. For best results, position the unit with the air gap above the P‑trap to avoid splash and ensure easy access for inspection and maintenance.

Maintenance and compliance

With UPC and IPC listing, the ET115-002 is designed to meet common plumbing code expectations. Regular checks of the discharge line and inlet connections will help maintain a clean, dry exterior during operation. The design emphasizes a protected air gap so that water remains contained within the system, even during varying flow scenarios.