Diesel Pump Kit 21V | 12GPM Self-Priming | 2x4.0Ah Batteries Included

This battery-powered transfer pump handles diesel jobs anywhere without extension cords. Drawing from a 21V power base, it moves up to 12 gallons per minute to drain a 55-gallon barrel in under five minutes. An auto-shutoff nozzle clicks off the flow as soon as your tank fills. Features and Benefits - Pair of 4.0Ah 21V battery packs - Provides enough run time to transfer several hundred gallons between charges - 260W self-priming motor - Draws suction on dry lines quickly and pushes up to 12 GPM under steady load - Auto-shutoff dispensing nozzle - Stops the stream automatically to prevent overflows when the tank fills up - Wire-mesh suction strainer - Filters out rust flakes and tank dirt before they reach your machinery Applications - Refueling tractors, combines, and skid steers straight from drums in the field - Topping off diesel generators and light towers on off-grid work sites - Moving fuel from truck-bed transfer tanks directly into work equipment Key Compatibility Differences A diesel transfer pump must never be used for petrol. Buyers often ask why fuel transfer pumps of this type are not suitable for gasoline, and the answer comes down to motor design and flash points. Petrol produces volatile vapours even below 45°F, requiring strictly certified explosion-proof casings and specialised seals. Standard diesel pumps operate with motors that are not intrinsically safe against these combustible fumes, creating a severe fire hazard. Diesel has a much higher flash point, typically above 43°C, allowing the 21V, 260W motor and its automatic shut-off mechanism to move diesel fuel safely without risk of vapour ignition. What It Is A diesel transfer pump is a dedicated mechanical unit designed to move diesel fuel quickly between storage drums, intermediate bulk containers, and machinery tanks. The SP12 Ultra is a cordless, self-priming diesel pump kit delivering a flow rate of 45.4 L/min, which equates to 12 GPM. Operating on a 21V platform powered by two included 4.0Ah batteries, it eliminates the need for trailing mains leads or crocodile clips hooked to vehicle batteries. Being self-priming, the internal mechanism draws fuel up the suction line automatically without manual pre-filling, whilst the automatic shut-off feature helps prevent overfilling during fluid transfer tasks. Key Uses & Applications This pump kit is designed for mobile refuelling across workshops, plant yards, agricultural holdings, and construction sites. The 260W cordless system allows tradespeople to refuel excavators, tractors, site generators, and commercial vehicles directly from static bunded tanks or 205-litre barrels out in the field. Having two 4.0Ah batteries supplied means one pack can remain on charge while the other works, avoiding site downtime. The unit is strictly intended for clean diesel transfer; never run it dry, and avoid using it for petrol, thinners, water, or corrosive chemicals to prevent seal degradation and motor burnout.