Aluminum alloy pump body for a durable lightweight pump that is easy to transport. Heavy-duty pump diaphragm and check valves reduce maintenance costs and ensure long life. Surge chamber on inlet side of pump results in smooth pump operation by absorbing pressure spikes reducing wear. Oil bath-lubricated transmission ensures continuous lubrication to all parts of gear transmission system reducing both maintenance costs and lost production time. Hardened forged gears extends pump life and provides efficient power transmission from the engine to the pump. Straight-through water flow design provides high-production pump capacity and less downtime blockages. Transport handles and rubber wheels for easy jobsite movement. Central lifting eye for easy pump placement.