The Shurflo 4138-131-E65 replaces the 3901-12166 pump and is a marine grade ignition protected 24v DC automatic pressure pump with 4 diaphragms in Santoprene and the valves in EPDM which make this pump suitable for pumping fresh or salt water, dilute herbicides as well as low concentrations of most weedicide and some insecticide sprays. Supplied with a sealed pressure switch with check valve, thermal overload protection and the ability to run dry without damage, this is a very usefull 24v DC pump. The Shurflo 4138-131-E65 has an internal bypass allowing it to pump efficiently without cycling even at very low flow rates, it will lift water from 2.0m and has a maximum flow rate of 11.3 litres per minute. Click here to download the pdf spec sheet. Click here for adaptors.