Pump Features: When it comes to fluid transfer applications, the Everflo 12V On-Demand 2.2GPM QA Diaphragm Pump is the king of the hill. This pump is loaded with features such as a Honeywell Micro Switch™, durable Viton valves & Santoprene™ diaphragm, fiberglass-reinforced polypropylene pump manifold with quick attach ports