100DMP4 Double Head Fixed Flow Pump - 25 PSI 100 GPD 120 Volt - 1/4 Inch Standard Tubing ad-label_Accessories The o-ring is 3-3/8 Inch

The o-ring is 3-3/8 Inch OD x 3 Inch ID x 3/16 Inch thick

but as a group it may be very complicated

This Stenner chemical pump #45MJL4A3STAA provides reliable chemical feeding for your swimming pool

(1) Wall Charger

a large 8-line screen display

100DMP4 Double Head Fixed Flow Pump - 25 PSI 100 GPD 120 Volt - 1/4 Inch Standard Tubing ad-label_Accessories The o-ring is 3-3/8 InchThis Stenner chemical pump #100FL5A1SUAA provides reliable chemical feeding for your swimming pool. This fixed flow pump is rated to pump 100 gallons of chemicals per day at 25 PSI. This stenner pump is a great choice for all your chemical needs.