Welcome

Medcalf Bros. Hy Flo
Vintage Reciprocating
Piston Air Pumps







*** All Models ***

*** For Sale ***



Manufactured by:
    Medcalf Bros.
    Cranborne Road
    Potters Bar
    England

We also provide:
    Servicing and Repairs.
    Spare Parts.
All enquiries :






Available for purchase : a wide selection of Hy Flo (HyFlo, Hy-Flo) pumps, originally manufactured by Medcalf Bros. Ltd. of Potters Bar, England...

Exquisite looking, near silent pumps - both functional and aesthetically pleasing - these remarkable show-pieces are a British design classic, and in recent years have become increasingly difficult to track down.

Out of production for close to three decades, still regarded as being light-years ahead of the competition.

Models available : "A", "B", "C" and "Junior" Hy Flo Pumps available including both aquarium and technical/laboratory pumps (please use the menu provided above to look at individual models).

Discounts are available for multiple purchases.

All pumps come with an instruction/maintenance sheet - available for download.

When available, we also have a limited number of spare parts for various models.

New Feature !! : reference list of all recorded pump plates with serial numbers.

New Feature !! : youtube videos of Hy Flo pumps, including a new service / maintenance video.



If you are unable to find the pump you are looking for, or just have a general enquiry, please feel free to drop us a line at:
and we'll get straight back to you.

We can also offer service and repair facilities - if you are experiencing a problem with your pump, again, just get in touch with us at : and we'll try to help.





!!! Latest Stock !!!
- 24 October 2020 -



Model C Hy Flo Pump
Model C pump with dual output and vacuum inlet components.
Perfect working order and good con... [click for details & full pictures]

[details]

Model C Hy Flo Pump
Model C pump with dual output and vacuum inlet components.
Excellent working order and nice c... [click for details & full pictures]

[details]


Model C Hy Flo
Model C pump with both air output and vacuum inlet components.
Very good working order with rec... [click for details & full pictures]

[details]

Model C Hy Flo Pump
Model C pump with dual output and vacuum inlet components.
In good working order with a fair am... [click for details & full pictures]

[details]


Model C Hy Flo Pump
Model C pump with dual output and vacuum inlet components. Pump has mis-matched pistons.
Pump ... [click for details & full pictures]

[details]

Exceptionally rare Black Junior Aquarium Pump
Black Junior aquarium pump with "open" series I piston and single port.
First and only one of ... [click for details & full pictures]

[details]


Model B Laboratory Pump
Model B laboratory pump in very good condition.
Some minor cosmetic wear to the black paint and... [click for details & full pictures]

[details]

Boxed Model A Aquarium Pump
Model A aquarium pump in lovely condition - excellent working order and almost no cosmetic wear.
... [click for details & full pictures]

[details]


Model A Aquarium Pump
Single piston dual outlet model A aquarium pump.
Perfect runner in excellent condition and work... [click for details & full pictures]

[details]

Junior Aquarium Pump
Junior model aquarium pump.
Pump is in excellent working order - a very good runner, with very ... [click for details & full pictures]

[details]


Junior Aquarium Pump
Junior model aquarium pump.
Pump is in excellent working order - a very good runner, with minor... [click for details & full pictures]

[details]

Single Outlet Junior Aquarium Pump
Single outlet "Super Junior" aquarium pump. Excellent working order with some minor cosmetic wear to... [click for details & full pictures]
[details]


Single Outlet Junior Aquarium Pump
Single outlet "Super Junior" aquarium pump. Very good working order with minor cosmetic wear to the ... [click for details & full pictures]
[details]

Junior Hy Flo Super
Lovely example of a Junior Super Hy Flo.
Very few, if any signs of wear.
An extremely good... [click for details & full pictures]

[details]


Junior Aquarium Pump
Junior Hy Flo in good working order.
Good runner - some to the pump shell paintwork.
Seri... [click for details & full pictures]

[details]

Model A Aquarium Pump
Model A aquarium pump. The pump shell is a bit dirty and there is some cosmetic wear to the cylinder... [click for details & full pictures]
[details]


Single Outlet Junior Aquarium Pump
Single outlet "Super Junior" aquarium pump. Excellent working order but in poor cosmetic condition. ... [click for details & full pictures]
[details]

Junior Aquarium Pump
Junior Hy Flo in good working order. The pump is dirty and there is some minor cosmetic wear to the ... [click for details & full pictures]
[details]


Junior Aquarium Pump
Junior Hy Flo in good working order. The pump is dirty.
A slow but steady good runner.
Se... [click for details & full pictures]

[details]



- site last updated : 24 October 2020 -
- all content and images protected by copyright - ©mmxix

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