Unicel S-7172 Replacement Filter Disc for Sta-Rite System 2 PLM Series | 17" Testing & Measurement Parts This is an excellent mid-level

This is an excellent mid-level test kit for the top 6 water tests

As a result of the buffering effect of total alkalinity

IMPORTANT: VERIFY YOUR FILTER'S MANUFACTURE DATE BEFORE ORDERING

Pentair Part Number U11-200PSZ Part Name Collar Union 2 in

Bronze - suitable for salt water pool installations

Unicel S-7172 Replacement Filter Disc for Sta-Rite System 2 PLM Series | 17" Testing & Measurement Parts This is an excellent mid-levelThis Unicel S 7172 filter disc is a direct replacement for the media used in Sta Rite System 2 Modular DE filter models PLM100, PLM150, PLM200, and PLM300. Manufactured by Unicel, a trusted leader in pool filter technology, this high quality aftermarket replacement delivers reliable filtration performance for residential and commercial swimming pools. IMPORTANT: FILTER SYSTEM VERIFICATION This filter disc is designed specifically for Sta Rite System 2