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Petrol Diaphragm Pumps

Portable, fast-start mechanical diaphragm pumps designed for contractors, civil crews, maintenance teams and rapid-response dewatering tasks.
Allflo’s petrol-driven diaphragm pumps provide strong suction lift, dependable self-priming, and easy mobility — making them ideal for short-term pumping, intermittent operation, and sites without convenient access to power.
With rugged build quality, dry-run capability and the ability to handle abrasive slurries and solids, these pumps deliver reliable performance across sludge, slurry, wastewater and general fluid transfer.
For trades, councils, groundworkers and maintenance operations, petrol diaphragm pumps offer an affordable, versatile pumping solution for everyday site challenges.
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  • Self-priming suction lift up to 7.5 m
  • Fast-start petrol engine for rapid deployment
  • Dry-run safe with rugged frames for site handling
  • Passes solids up to 80% of port size
  • Portable design suits short-term/remote tasks
Applications
▫️Construction and civil site dewatering
▫️Small excavation and trenching work
▫️Wastewater, slurry and abrasive media transfer
▫️Emergency and rapid-response pumping
▫️Council and groundworks maintenance tasks
Benefits

Reliable solids handling with up to 80% of port size
Mechanical diaphragm design for low maintenance
Dry-run capable for flexible site operation
Strong performance on variable flow conditions
Portable, rugged and ideal for intermittent pumping

RDO25P – 1" Petrol Diaphragm Pump
Compact petrol-driven diaphragm pump for light–medium viscosity liquids, paints, chemicals, resins, and general dewatering.

Key Features

  • Highly portable and easy to manoeuvre
  • Perfect for short-term on-site pumping
  • Self-priming and dry-run safe

Performance Summary:

  • Port size: 1" (DN25)
  • Flow: ~16–25 L/min
  • Suction lift: up to 7.5 m
  • Head: ~6 m
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RDO32P – 1¼" Petrol Diaphragm Pump
Versatile diaphragm pump for wastewater, light sludge, contaminated liquids, and civil dewatering tasks.

Key Features

  • Reliable solid-handling capability
  • Great for mobile civil crews and contractors
  • Fast-start petrol engine for rapid deployment

Performance Summary:

  • Port size: 1¼" (DN32)
  • Flow: ~33 L/min
  • Suction lift: up to 7.5 m
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RDO38P – 1½" Petrol Diaphragm Pump
Mid-size diaphragm pump for slurry, sludge, thicker waste streams, and contaminated liquids.

Key Features

  • Strong performance in abrasive conditions
  • Light, portable, and site-ready
  • Ideal for councils and construction crews

Performance Summary:

  • Port size: 1½" (DN40)
  • Flow: ~50 L/min
  • Suction lift: up to 7.5 m
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RDO50P – 2" Petrol Diaphragm Pump
High-flow diaphragm pump for industrial waste, raw sewage, and sludge removal — with portable site-ready capability.

Key Features

  • Handles viscous, corrosive, and abrasive fluids
  • Large diaphragm for improved throughput
  • Ideal for short-term wastewater and dewatering tasks

Performance Summary:

  • Port size: 2" (DN50)
  • Flow: ~100 L/min
  • Suction lift: up to 7.5 m
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RDO76P – 3" Petrol Diaphragm Pump
Maximum-flow petrol diaphragm pump for heavy sludge, slurry, and waste applications requiring high mobility.

Key Features

  • Built for thick, solids-laden fluids
  • High portability with strong pumping performance
  • Suitable for emergency pumping and site clean-up

Performance Summary:

  • Port size: 3" (DN80)
  • Flow: ~210 L/min
  • Suction lift: up to 7.5 m

Materials & Configuration Options

  • Diaphragms: Buna-N, Neoprene, Viton
  • Wetted Parts: Aluminium, 316 Stainless Steel, Cast Iron
  • Mounting: Baseplate, Skid, Carry Frame
  • Optional engine guards, lifting points, anti-vibration mounts
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RD Series – Petrol Diaphragm Pumps

The RD Series Petrol Diaphragm Pumps use a reinforced diaphragm actuated by a mechanical eccentric cam and gearbox to generate strong suction and reliable pumping without seals or rotating wetted parts.

This makes them ideal for viscous, abrasive, and solids-laden fluids, especially where portability and rapid deployment are required.
General Performance
▫️Suction lift: up to 7.5 m
▫️Head: up to ~6 m
▫️Solids handling: up to 80% of port size
▫️Port sizes: 1" to 3" (DN25–DN80)
▫️Wetted parts: Aluminium, Stainless Steel, Cast Iron
▫️Diaphragms: Buna-N, Neoprene, Viton
▫️Mounting options: Baseplate, Skid, Carry Frame

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