The MainGuard #7500 Blow-Off Hydrant is designed and engineered specifically for flushing large amounts of water quickly. The unit provides excellent flow rates comparable to a standard fire hydrant. The MainGuard #7500 Blow-Off Hydrant accommodates a high flow volume for bio-film scouring applications and the unique valve design allows for flushing of large debris. The unit provides ample flushing velocities usually at half the cost of a fire hydrant. The MainGuard #7500 comes standard with all brass principle working parts, 4” inlet and outlet and is self draining and non-freezing. The MainGuard #7500 is fully serviceable from above ground. Certified to NSF/ANSI 372.