Pentair 154712Z Drain Cap Sand Filter is designed to use with Pentair Sand Dollar top mount pool and spa sand filter models SD 35, SD 40, SD 60, SD 70, SD 80 and also compatible with Pentair Meteor, Cristal-Flo II pool and spa aboveground sand filters. Pentair's sand filters are easy to operate and maintain. Their swimming pool sand filters feature a special internal design that maintains the sand bed level and ensures even water flow for the most efficient filtration possible.