The Vac-Alert SVRS VA2000L prevents body and limb entrapment on all residential and commercial swimming pool main drains - quickly freeing anyone trapped on the drain, preventing severe injury or death.Additional features include:The perfect safety solution for every pump that draws water, including pools, spas, fountains, slides and vacuum ports. Self monitoring, non electrical and low maintenance. Easy to install within thirty minutes. An installation DVD is included with every unit. It is recommended to use a pool professional. Long lasting design features moisture resistant PVC, and stainless steel construction. Proven to work - some states such as Texas, North Carolina, and other places like Ontario, Canada are requiring commercial pool owners use equipment like Vac-Alert to retrofit pools and spas. Meets all requirements of the International Code Council, both the International Building Code (IBC) and the International Residential Code (IRC). Meets or exceeds all the ANSI/ASME performance standards for safety vacuum release systems. Complies with Virginia Grame Baker Pool and Spa Act 3-year limited warranty ensures reliability. Chemical resistant.Won't damage your pump when tripped.The Vac-Alert Model VA-2000L is a Safety Vacuum Release System (SVRS) designed for suction lift applications. Suction lift in this case applies to all applications where the circulating pump suction is either at or above the level of the pool water surface. This unit incorporates a 0.170” diameter orifice opening installed below the surge tube section. This orifice opening is sized to prevent nuisance tripping of the SVRS unit caused by high vacuum surges typical of many pump start-up conditions.The Model VA-2000L SVRS unit also utilizes a check valve assembly equipped with a 3.5 pound spring, a poppet disc and a one-way (up only) vented poppet This check valve assembly permits continued water flow to the circulating pump while the SVRS unit is in the open or vented position. The 3.5 pound spring further compressed by the poppet disc, creates enough sealing force within the check valve to allow partial water flow to the circulating pump for suction lifts up to 3.5 feet. This is critical to the elimination of circulating pump damage that can be caused by a sustained dry-running condition. The one-way vented poppet allows the surge chamber to be internally recharged when the circulating pump is turned off.
