PA & PAH Series Prime Assist Pumps - Peak Efficiency In The Field

PA & PAH Series Prime Assist Pumps – Peak Efficiency In The Field

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The Gorman-Rupp PAH Series of prime assist (also known as dry prime or auto prime) centrifugal pumps are capable of delivering high heads and/or high flows for applications from wastewater bypassing to mine dewatering.

Field adjustable running clearances mean this pump can be kept at peak efficiency and left in the field for longer (instead of having a trip back to the workshop for a wear ring change).

Advantages include:

  • Ability to mount high and dry above the water (not in it)(to 7.6m)
  • Low cost of ownership
  • Greatly reduced OH&S issues
  • Easy access for monitoring or service
  • Improved maintenance features to greatly reduce maintenance time and costs
  • A variety of materials of construction to handle abrasive and/or corrosive fluids
  • Any engine brand required by the customer
  • Choice of skid or trailer mounted configuration


Learn how the PA and PAH series pumps work in the field.

Gorman-Rupp Prime Air Priming Assisted (Dry Prime) Pumps

An overview including the features and benefits of Gorman-Rupp’s Prime Aire priming assisted pumps.

  • Tackle even the toughest jobs for sewage bypass operations, construction site dewatering where intermittent flow can be a problem.
  • Dependable and versatile

Ask Our team »

Our expert team is standing by for any questions you have about how best to configure your pump system.

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OneHarvest love their Gorman-Rupp pump
Application: Wastewater
Industry: Food & Beverage
Region: QLD
Super T Series Gorman-Rupp self-priming pump

Project Showcase: One Harvest

Food manufacturer looks to Hydro Innovations to solve its wastewater challenge.

Feedback from the plant was “We couldn’t be happier with this pump and it’s become the standard that we will use going forward” and “One of the best things we have done”.

The pump has performed so well, the plant is instigating a policy to replace their other submersible pumps with Gorman-Rupp self-priming pumps.

Read the full case study »

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Data Sheets

Download the specifications to find the perfect pump for your project:

Ready to build the perfect pump system for your project? We’re standing by to help.

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PA and PAH Series Grey Water, Dewatering, and Engine Driven Pump Performance

See the specifications for the PA and PAH series pump.

Introduction paragraph talking about versatility, mentioning applications and materials and some use cases.

Flows: 5 l/s – 300 l/s

Heads: 5m – 40m

Solids: to 76mm spheres + Stringy to Very Stringy

Size: 2″, 3″, 4″, 6″, 8″, 10″ + 12″

Priming: Guaranteed Re-Primer

Application: Effluent to Trash and Sewage

Special Features and Pump Benefits

Features designed for longer field times.

Patented External Shim-less Adjustment System

Patented External Shim-less Adjustment System

The shim-less impeller clearance adjustment allows for accurate maintenance of the clearance between the impeller and wear wear ring, without replacing parts or removing the grey water pump from service. Once adjustments have been made, the unique collar and adjusting screw maintains the clearance setting during other maintenance or inspection events. Peak efficiency is maintained, the life of the wear ring is maximised, and the potential for blockages is reduced.

Bearing/Shaft Protection

The bearings and shaft of a Gorman-Rupp PAH Series self priming pump are protected in the event of a mechanical seal failure. A double lip seal and atmospheric vent arrangement are in place if the mechanical seal is breached. Any leak through the mechanical seal and past the first lip seal will vent to atmosphere and not breach the bearing chamber.

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Our Team is available to answer your pump query within the hour

Hydro’s experts are standing by to help you get the best pump, aerators and genuine spare parts for your specific project.


or Call

(02) 9898 1800

Monday – Friday
9am – 5pm
Australia Wide

Hydro Innovations is proud to distribute a broad range of quality, reliable and industry-leading industrial pumps and aerators.

We are also delighted to share that Hydro Innovations is proud to be the exclusive distributor of Gorman-Rupp Pumps.

Gorman-Rupp is the world leader in self-priming centrifugal wastewater pump technology, and invests heavily in R&D, and in training for their international representatives – like Hydro Innovations.

This puts us in an excellent position to make the very best recommendations for our Australian customers.

Our other suppliers, Ragazzini of Italy and EDUR of Germany, are also world leaders in their respective technologies (Peristaltic Pumps – Ragazzini, and Specialist centrifugal pumps – EDUR).

We carry a very large inventory of pumps and spare parts for all of these brands, to help us to deliver industry-leading service.

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