Wall mount air gaps provide a simple, code-compliant discharge path for RO systems, water softeners, and drinking water faucets. This guide highlights top wall mount air gap options designed for easy installation, reliable splash protection, and compatible standpipes. Each pick is evaluated for flow capacity, ease of connection, and standpipe compatibility to help you choose the right model for your setup.
| Product | Brand | Inlet/Outlet Sizes | Standpipe Compatibility | Key Strength |
|---|---|---|---|---|
| GAP-A-RO AG110-003 | AIR GAP INTERNATIONAL | Inlet 1/4″ OD; Outlet 3/8″ OD | Direct to standpipe | Clear RO integration with standpipe feed |
| GAP-A-RO AG110-002 | AIR GAP INTERNATIONAL | Inlet 1/4″ OD; Outlet 3/8″ OD | Direct to standpipe | Includes mounting hardware for secure install |
| Gap-Cap AG130-001 | AIR GAP INTERNATIONAL | 1/2″ OD inlet; 3/8″ inlet for RO | 1-1/2″ or 2″ standpipes | High flow with splash protection |
| Everpure EV312339 Wall-Mount Air Gap Adapter | Everpure | Standard for Everpure faucet connections | Compatible with RO discharge lines | Commercial-grade reliability |
| AG100-002 Universal Dual Air Gap | AIR GAP INTERNATIONAL | Dual 3/8″ OD inlets | 1-1/2″ to 2″ standpipes | Two independent flow paths |
GAP-A-RO AG110-003 Wall Mount Air Gap
The GAP-A-RO AG110-003 air gap is designed for reverse osmosis systems, featuring a 1/4-inch OD inlet for RO feed tubing and a 3/8-inch OD outlet that feeds directly to a standpipe. Its maximum flow rate is rated at 1 GPM, ensuring the outside of the unit remains dry at peak operation. The setup includes accessories to secure a reliable standpipe connection, reducing the risk of kinks or leaks. This model emphasizes straightforward installation and consistent drainage performance for RO installations in kitchens or utility areas.
GAP-A-RO AG110-002 Wall Mount Air Gap
The AG110-002 air gap mirrors the RO-focused design of the AG110-003, with an inlet for 1/4-inch OD tubing and an outlet for 3/8-inch OD tubing, directing flow into a standpipe. A notable feature is the inclusion of mounting hardware such as brackets and clamps to secure the unit to a wall or cabinet. The device prioritizes a dry exterior at typical operating rates and supports a smooth transition from RO unit to standpipe without unnecessary bending or trapping of tubing.
Gap-Cap AG130-001 Dual Air Gap
The Gap-Cap AG130-001 is a dual air gap intended for use with water softeners and RO systems. It features inlets for 1/2-inch PVC connections and 5/8-inch tubing, plus a 3/8-inch inlet suitable for RO discharge lines, accommodating both 3/8-inch poly tubing and 1/4-inch tubing with adapters. The unit includes splash guards to maintain dry operation and is designed to fit into 1-1/2-inch to 2-inch standpipes. This model balances high-capacity drainage with splash prevention for multi-system setups.
Everpure EV312339 Wall-Mount Air Gap Adapter
The Everpure EV312339 adapter is tailored for Everpure drinking water faucet connections to reverse osmosis systems. It emphasizes compatibility with Everpure commercial-grade filtration lines and is designed to deliver a consistent, high-quality water stream. This air gap adapter is a practical choice for applications that rely on Everpure components and require reliable integration with RO installations in both residential and commercial settings.
Water Softener Air Gap for Washing Machine Box AG140-001
The AG140-001 is designed for installation in washing machine outlet boxes with a 2-inch drainpipe, making it suitable for water softener discharge lines. It uses a 1/2-inch OD inlet and a 2-inch standpipe-compatible base. It includes splash guards for dry operation and is tested for a higher discharge rate, making it a robust option for laundry room installations where space and drainage compatibility are key considerations.
Universal Dual Air Gap AG100-002
The AG100-002 Universal Dual Air Gap provides two independent 3/8-inch OD inlet ports for direct poly tubing connections. It is compatible with 1-1/2-inch or 2-inch standpipes and is designed for multi-sourced drainage, including condensates, water softeners, and water filtration discharge. The dual inlets help separate different discharge streams, reducing cross-flow and potential backflow issues in complex systems. The unit emphasizes drag-free performance with secure mounting and a splash-protected interior.
Buying Guide: Key Purchase Considerations And Comparisons
When choosing a wall mount air gap, consider the following factors to ensure proper function and code compliance:
- Flow capacity: Match the expected discharge rate of your RO, softener, or filtration system. Higher flow rates are beneficial for multi-system setups but require compatible standpipes and drainage paths.
- Inlet and outlet sizing: Confirm that the air gap’s inlet/outlet connections align with your tubing sizes (commonly 1/4″, 3/8″, 1/2″, or 5/8″). Using adapters can expand compatibility, but verify dry-out performance at maximum flow.
- Standpipe compatibility: Ensure the standpipe diameter and height suit the air gap design. Some units are optimized for 1-1/2″ or 2″ standpipes, while others accommodate standard 3/4″ or 1/2″ tubing into a larger pipe.
- Splash protection and dryness: Look for splash guards or funnel designs that minimize water splashing outside the unit during surges, especially with water softeners or high-flow RO systems.
- Installation ease: Consider included mounting hardware, clamps, and brackets. Wall-mounted models should secure firmly to minimize movement and stress on connections.
- Materials and durability: Polycarbonate and high-quality plastics, along with corrosion-resistant components, improve long-term reliability in kitchens, garages, and laundry areas.
- Compatibility with fixtures: If using Everpure or other branded filtration lines, confirm adapter compatibility to avoid mismatches or required modifications.
- Code compliance: Ensure the chosen model meets local plumbing codes for air gaps and drainage, especially in commercial-grade or multi-system environments.
Across these options, users with RO systems often favor models with simple RO connections, dry exterior design, and robust standpipe integration. For multi-system installations (RO plus water softeners or condensate drains), dual inlets and higher flow capacities become important. For kitchens and home setups using Everpure components, adapters designed for Everpure connections streamline installation and reduce the need for additional fittings. Always verify compatibility with your specific tubing sizes and standpipes before purchase.