The UHD allows free drainage without contamination.  It will allow the water to drain away from the pipe and elach naturally, thus preventing premature and costly replacement.  The leaching ability is equivalent to approximately 9 sq. ft. of washed gravel that is 6" deep.  New installations no longer require a person to be in the trench eliminating the risk of injury, should the trench walls fail.  Hydrant installation is no longer consuming or labor intensive and most importantly no longer a Safety Hazard.  The UHB will fit all standard size hydrants.  Simply attach to the hydrant bottom to protect the valve from all sediment and allow the hydrant to drain quickly and efficiently.  This simple and patented two-piece device can be installed after the waterline is secured to the fitting.  Safely assemble it above ground, then lowered into the trench and backfilled without gravel.  The UHB is a light weight, durable and cost-effective device that will never rust or collapse.