Pentair PacFab TA50 Standpipe Assembly [New Style, After 05 19] (155062) topsides The MB3 wrench is designed The MB3 wrench is designed for compatible TR60 sand filter applications where the dome component needs to be removed or tightened during maintenance The V38 131 is a strong service choice when an UltraFlow rebuild needs the right core support piece rather than forcing new seals into a compromised original plate This new style TA50 standpipe assembly is designed for post 05 19 Pentair PacFab Tagelus sand filter applications where the internal center pipe assembly needs replacement A sound standpipe is critical because it carries filtered water out of the tank while keeping the lateral system properly aligned inside the sand bed