The Gaer® swing check valve is used extensively in water pipes. It is also suited for work with wastewater, dirty water or water with high concentrations of suspended solids. Its design guarantees a very low load loss, and total passage of the fluid. Its shutoff system is free of possible obstructions and requires minimum pressure both for opening and closing. The valve maintenance is possible without need of dismantling it from the pipes; internal parts can be repaired or replaced by unscrewing and removing the cover.