Four chamber diaphragm pump. Self-priming up to 8' and able to run-dry without damage. Designed to support up to five fixtures. 4405 models are configured with an internal bypass that delivers smooth, steady water flow without the need for an accumulator tank. Includes quick connect fittings: two 1/2" QEST (NPS thread) and two 1/2" hose barb. 3.8" H x 6.3" W x 8.2" L. GPM 3.3 PSI 35 Includes Fittings Volts 12 Amps 3.9