Model 34700 Mr. Drain Softener Air Gap
Code-compliant backflow prevention for water softener drain lines sharing standpipes with washers
Engineered for shared drain applications
Code-Compliant Air Gap
Provides more than twice the minimum required air gap opening to prevent backflow contamination into potable water supply per plumbing code standards
Dual Drain Design
Allows soft rubber washer hose or metal drain hook to share standpipe with air gap unit, eliminating the need for separate drain lines in utility rooms
Universal Standpipe Fit
Accommodates both 1.5 inch and 2 inch standpipes with 5.5 inch housing length for flexible installation in residential and commercial settings
High Flow Capacity
Recommended for 1 to 7 GPM continuous flow, tested at 15 GPM in lab conditions to handle regeneration cycles from most residential water softeners
Standard Inlet Port
Inlet port fits 0.5 inch schedule 40 PVC slip fittings or Air Gap International special couplings P/N 211217, 211213S, 51024, or 8504 for secure connections
Installation requirements
The Air Gap International 34700 Mr. Drain fits 1.5 inch or 2 inch standpipes commonly found in laundry rooms and utility spaces. Inlet port accepts 0.5 inch schedule 40 PVC slip fittings or Air Gap International couplings P/N 211217, P/N 211213S, P/N 51024, or P/N 8504. Designed for water softener drain lines sharing space with washing machine drains. Rated for 1 to 7 GPM recommended usage with tested capacity up to 15 GPM. Suitable for residential, commercial, and light industrial water treatment applications requiring backflow prevention.
Residential Protection
Prevents backflow contamination in home water softener systems sharing drain lines with washers
Commercial Ready
Meets code requirements for restaurants, hotels, medical facilities, and multi-family buildings
Durable Construction
Built from sturdy materials to withstand daily regeneration cycles and shared drain usage
Simple Installation
No special tools required with standard PVC slip connections and straightforward mounting
