Pentair PCD–1000 Submersible Utility Pump, .75 HP, 115 V, 6.4 Amp | PCD-1000 Head Immobilizers these small OD differences are

these small OD differences are expected and normal for a Unicel replacement

you can use the DMS-101A

Controlled Release Technology (CRT) ensures optimal mineral levels with no staining

When phosphates are removed

which includes seven components (detailed below in the specifications)

Pentair PCD–1000 Submersible Utility Pump, .75 HP, 115 V, 6.4 Amp | PCD-1000 Head Immobilizers these small OD differences are3 4 hp stainless steel utility pump is a robust submersible pump is designed for draining and utility applications. The PCD1000 submersible, portable, high capacity pump designed for use by the professional in draining pools and spas as well as for general purpose applications, now has improved flow rates, and stainless steel casing, suction strainer, impeller and shaft for greater corrosion resistance and longer service life. The PCD 1000 can pump