This W9500153 Injection Pump Kit is compatible with the VersaChlor system and works to inject fluid into the reservoir or production system. The VersaChlor® is an easy feed chlorination system that is available for any commercial pool, anywhere in the country. The VersaChlor system works by diverting a side stream of water through the unit and over a sieve plate so only the tablets on the bottom come in contact with water. This preserves the integrity of the tablets above and contributes to predictable chlorine delivery.