Air Gap International AG130-001 Dual Air Gap for Softener & RO — 1/2–5/8 inlets, 3/8–1/4 inlets, 1-1/2–2 in Standpipe

The AG130-001 dual inlet air gap from Air Gap International provides a practical drainage solution for both a water softener and a reverse osmosis (RO) system. Listed by UPC and tested to IPC and NSF standards, this compact unit helps keep drainage reliable in kitchens, utility rooms, or undersink spaces. It is designed to work with typical residential piping while maintaining a clean, orderly setup.

Smart design that fits your setup

• Water softener port accepts 5/8-inch OD tubing or a 1/2-inch PVC slip joint for flexible installation.
• RO port accepts 3/8-inch OD tubing directly and 1/4-inch OD tubing with the included adapter for compatibility with common RO kits.
• Inlets are paired with standpipe compatibility for 1-1/2-inch or 2-inch pipes, with built-in stops to keep the unit securely in place.
• Flow capacity supports up to 7 GPM, with an optimum range of 4–5 GPM for smooth drainage.

Splash protection and quiet operation

• Splash guards are integrated to help maintain a dry operation and minimize overspray during initial discharge surges.
• For quieter drainage, angle or elbow considerations (such as a 22-degree inline elbow) are recommended to reduce splashback near the standpipe.

Certification, testing, and reliability

• The AG130-001 is UPC Listed and tested to IPC and NSF standards, offering confidence in code compliance.
• Manufacturing lots are tested for strength, ensuring glue joints can withstand notable force (at least 40 lb).

What to expect during installation

The water softener drain and RO drain connect through dedicated ports, with straightforward options for tubing and slip joints. If you’re installing on plastic standpipes, you may glue joints as needed for a secure fit. Ensure the P-trap is located at least 20 inches from the top of the standpipe to maintain proper drainage alignment.

What’s included and best practices

Key benefits you gain include flexible inlet options, secure standpipe compatibility, splash protection, and a design that supports standard residential drainage layouts. By combining two drainage paths in one air gap, it offers a practical, space-saving solution for homes with both a water softener and an RO system.