Pump-to-filter union connection provides simple installation and winterization * Corrosion-proof, modular platform base accepts optional chlorine feeder * EC301540ESNV includes: EC30 Filter; SP1540, 40 GPM Power-Flo pump; modular platform base; union connection; 1 1?2-inch hose package * Optional Microprocessor Pump Timer Feature Available * 1 1?2-inch hose packages include: two (2) 1 1?2-inch x 6-foot lengths of hose adapters and hose clamps