American Hydro Systems RR1 Rid O' Rust inhibitor spray is designed to neutralize iron and minerals in well water to prevent the formation of sprinkler system stains. Protect outdoor surfaces, including driveways, siding, stucco, and sidewalks from rust stains by adding professional-grade Rid O’ Rust stain prevention to your sprinkler system feeder tank regularly. The new RR1 2X formula is twice as strong and a cost-effective rust preventer made for American Hydro feeder systems. A half-gallon of this strong cleaning agent will treat 130,000 gallons of water with 1 ppm iron. This multipurpose cleaner can be applied through any irrigation system using the American Hydro feeder system and works with both old and new systems. Keep your sprinkler system rust-free and your exterior hard surfaces stain-free with this new powerful performance formula. The water treatment specialists at Pro Products offer a wide range of solutions that focus on rectifying problems, testing, cleaning stains, and maintaining the performance of water quality equipment.t.