2002 – MaxiFlow Culvert

John Installing Early MaxiFlow

As the Padman Stops brand and our flat stops and pipe ends became more popular, we were often asked if we made pipes. With some well established companies making quality pipes that suited our product, we were happy to supply their pipes with our products.

After talking to customers, installers and drivers about some of their pain points with round pipe John went into his shed again and began the design process for the MaxiFlow.

The MaxiFlow is a flat bottomed structure with a high strength arched opening that can be extended with multiple units to make custom width crossings. The ease of transport and installation, minimal silting and high flows have given farmers an alternative to round pipes.

They have become so popular we have setup a new company solely focused on a variation of this product that can cater to different applications across exciting new industries.

2021 will be the year for Padman Quick Culverts! 😉

1995 – Overshot Door

John with Early OverShot Door Install

It wasn’t long until the demand for deeper doors  brought about the ‘B’, ‘C’ & ‘D’ series for the Bay Outlet application.


With water delivery systems requiring even deeper doors, the demand was there for us to create the Overshot, which was the deepest door available at the time and capable of being used as a Channel Stop.


Being 100% watertight and easily transported due to the removable upstream and downstream anti-erosion wings, the Overshot remains a core product to this day.

1992 – New Product: Pipe Ends

John with early Pipe End

With several Padman Stops irrigation outlet options now available to his growing network, product requests began coming through to add some of that Padman design and functionality to Pipe Ends.


Taking into consideration different pipe sizes, erosion issues and the ability to automate, John came up with different Pipe End molds catering to these needs and remains one of our core products.

1991 – Expanding the product range

John installing irrigation outlet

The first collection of products were called the ‘A Series’, with a door depth of 300mm, which is shallow by today’s standards.


The numerals on the products represent how many (approx.) feet wide the door is, as it still does today. The A1 (300mm), A2, A3 and the widest door at the time the A4 (1200mm).


There was no need for walkways as we know them today and chains were used to open and close the rubber flap door.






1989 – First Padman watertight rubber flap door

John Padman in from of Padman Stop Bay Outlet

Whilst working on the family dairy farm, John continually battled flood irrigation gates that leaked with difficult manual operation and knew there must be a better way.


With the shed set up and time dedicated to product development, the ‘Padman Stop’ was born.


The original ‘Padman Stop’ was a precast concrete structure with a hinged door and rubber flap to seal it, and make the outlet completely watertight.


More products followed this initial success, and the rest, as they say, is history.