What is this Pump. Would it be any good for roof cleaning?

Shurflo 4111-035 Diaphragm Pump Power Twin 6.25 GPM 12VDC

Item # Description Price Qty        Order      Ships     SF 4111-035 Click Here for Parts Click Here for Datasheet Shurflo- Diaphragm Pump Power Twin Dual Head, 6.25 GPM Open Flow, 12VDC Intermittant Duty, Viton Valves, Santoprene Diaphragm, 45 PSI Demand Switch (adjustable 30-45 PSI), 1/2"-14 MSPT Pump Ports, This Model Includes Manifolds with 5/8" Barb Ports, Polypropylene Housings, Suitable for Agricultural Transferring, Spraying, and Use as a 1 to 1 Proportioning Pump Product Details $346.94 Immediately, 1