This manual covers the installation, operation, maintenance, and winterizing procedures for Pentair STAR diatomaceous earth pool filters.
The document is a service manual for Pentair STAR Regenerative Diatomaceous Earth (DE) Filters, specifically models ST80, ST50, and ST35. It details the filter's operation under pressure using DE powder to trap dirt as water flows through the grid cloth.
Key sections include installation instructions requiring mounting on a concrete slab with 1 1/2" NPT connections, operational data regarding pool turnover rates, and detailed procedures for regeneration (swish and bump) and cleaning. The manual also provides specific steps for winterizing the equipment in freezing temperatures to prevent damage from air entrapment or water expansion.
This filter is designed and intended for use to filter water in swimming pools.
The system must turnover the total volume of water in the pool at least two to four times in a twenty-four hour period.
The gap between the clamp ends should be between 3/8" and 7/8".