Patay DD120 Double Diaphragm Manual Aluminium Heavy Duty Pump.


The DD120 Double Diaphragm Pump – Available in three distinct versions and with diaphragms available in four materials to accommodate a wide range of fluids. Made in Cornwall.

Full Description

The Patay DD120 Range of Pumps – The flagship of the Patay Pump Range, these pumps are renowned for their durability and longevity.  Cast in aluminium, this double diaphragm pump can function on a single diaphragm. A true work horse, this pump can be found in industries and occupations as diverse as the MOD, construction, aid agencies, shipping, agriculture, fire departments and petrol forecourts.

As we are the manufacturer of this pump,  all component parts are readily available.  No matter what you break, damage or lose, we can replace it.  No need to replace the whole pump.  How green is that?

Designed to be base mounted, the addition of our aluminium base plate makes this pump fully portable.

Capacity: 136ltrs per min.  Head: 6m.  Lift: 6m

It is available in three distinct versions to best suit your particular application and wallet:

  1. Epoxy Coated Aluminium with Hand Wheel Access to Pump Interior and Stainless Steel Fittings.
  2. Plain Aluminium with Hand Wheel Access to Pump Interior and Stainless Steel Fittings.
  3. Plain Aluminium with BZP Locking Nut Access to Pump Interior and BZP fittings.

There is a choice of four diaphragm materials to accommodate your particular application.

Note: Nitrile Diaphragms are standard.  Please check your fluid compatibility before selecting a different diaphragm material or contact us for assistance.


Additional information

Weight 4.5 kg
Dimensions 35.6 × 18.3 × 26.5 cm
Diaphragm Type

, , ,

Max Flow (ltrs/min)

Max Head (M)

Max Lift (M)

Pump Material

, ,

Pump Action

Access to Pump Interior

Hand Wheels, BZP Locking Nuts

Port/Connector Size

1 1/2" (38mm)


Agriculture, Aid Agencies, Construction

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01209 831 937 

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Not sure what diaphragm type to pick?

Check our diaphragm compatibility information

Custom Orders

Customize your pump to meet specific demands

Manufacturing on site means we are able to meet specific demands, so let’s talk about what you need.

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