DG Flow - Presflo Electric Pump Controller INSTALLATION & USE The PRESFLO pressure-sensing pump controller automatically starts and stops the pump,It is a substitute for traditional pressure switch/surge tank systems while offering important advantages KEY FEATURES - Water Accumulator - Built-in- Non-Return Valve - Built-in- 3 Piece Union - Integrated- IP65 - Enclosure- Resin-protected PCB- Free Positioning - Vertical, Horizontal, or any angle- Excessively Frequent Starts - Protection with auto reset- Dry Run - Protection with auto reset3 Piece Union - integrated - Avoiding the need for expensive 3-piece unionsNon-Return Valve - built-in and with easy inspection - Avoid the need to install onePressure Gauge - easy-to-add - Optional: it can be added anytime Pump Matching Essential Check Carefully check the electric and hydraulic features and make sure they comply with those of the pump and the system, but in particular:Presflo 1.5 bars start pressure requires:- pump head of at least 2.