Pumps and Metering Equipment


300 Mini Pump Set

300 Mini Pumps are designed for convenient and accurate metering of all Group Size A, B and C WEST SYSTEM resin and hardeners. They mount directly on the resin and hardener containers and eliminate the mess involved with measuring by weight or volume. 300 Mini Pumps are calibrated to deliver the proper working ratio with one full pump stroke of resin for each one full pump stroke of hardener.

The 300 Mini Pumps Set contains one resin pump and two hardener pumps. 105/205-206 pumps deliver approximately 0.8 fl oz of resin/hardener with one full stroke of each pump. 105/207-209 pumps deliver approximately 0.9 fl oz of resin/hardener with one full stroke of each pump.

As packaged, the pumps are ready to install on the Group Size B containers. A package of extension tubes for Group Size A containers is included with the set. Group Size C extension tubes are included in the 105-C Resin and in the 207-SC or 209-SC packages.

If necessary, you can combine different group sized-as long as all of the pumps have a yellow head. To avoid confusion and possible off-ratio metering, 300 Mini Pumps have yellow heads, which should not be used in with any older pumps with a white head (301 and 303 pumps).

Made of durable polypropylene, the pumps give years of dependable service. Read and follow the priming, ratio verification and operating instructions that come with the pumps.

300 Mini Pump instructions (PDF)



306-25 Metering Pump

For metering larger quantities of 105 Resin and 205 or 206 (5:1 ratio) Hardeners. The 306-25 Pump will reduce mixing time and waste on large projects. A carrying handle allows you to move the pump where the work is. Reservoirs hold one gallon of resin, one quart of hardener. Dispenses approximately 0.5 fl oz of resin/hardener per pump stroke (about 1 qt per minute). Can be converted to a 3:1 ratio.

306-23 Metering Pump

Similar to 306-25 Metering Pump described above. For metering 105 Resin and 207 Special Coating or 209 Extra Slow (3:1 ratio) Hardeners. Can be converted to a 5:1 ratio.

Rebuild Kit

Includes seals, balls, gaskets, springs, high-rise tubes with ferrules and new resin and hardener reservoirs with lids.

306-Kit Model A Rebuild Kit for all 306 pumps.


303 Positive Displacement Pump (3:1)

This positive displacement metering pump dispenses three parts resin to one part hardener by volume. It consists of two separate parallel pump systems, one for the resin and one for the hardener. The two systems are operated simultaneously by a single lever. The pump delivers 2.3 fl. oz. of resin and hardener per full stroke of the dispensing lever. The reserviors hold two gallons of resin and one gallon of hardener. Red Base. For use with 207 Special Clear or 209 Extra Slow (3:1 ratio) Hardeners. 

305 Positive Displacement Pump (5:1)

Similar to 303 Positive Displacement Pump described above, the 305 pump is designed to accurate dispense WEST SYSTEM resins and hardeners at 5:1 by volume. Blue Base. For use with 205 Fast or 206 Slow (5:1 ratio) Hardeners.


320 Small-Batch Epoxy Scale *

For batches smaller than one Mini Pump stroke, the 320 scale accurately measures the correct ratio of resin and hardener from 4.4 fl oz down to just a few drops. The scale can also be used to confirm the accuracy of your WEST SYSTEM dispensing pumps and to consistently add pigments or other additives. The scale comes in a convenient kit for small projects. The kit includes dispensing bottles, 3¼ oz and 1 oz plastic mixing cups, mixing sticks and pipe cleaners. Click here for recalibration instructions. 

 Product is currently only available in North & South America


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