|Item Weight||4.8 ounces|
|Product Dimensions||15 x 12 x 8 inches|
|Manufacturer Part Number||300|
Mini Pump Kit for 301 and 305 in Quart, Gallon, 5 Gallon sizes
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PUMPS are for convenient and accurate dispensing of West System #105 resin and #205 or #206 hardeners. Calibrated to deliver proper working ratio with one stroke from each pump. Made of durable polypropylene. Can be left mounted in cans. Kit includes one Resin pump and two Hardener pumps sizes ABC
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I did see someone else comment negatively about how the plastic was brittle and broke for them after a couple pumps. Because of that I was cautious at first but after a while I saw that point was null and void. I was not gentle with these suckers, I just went to town on them.
Included hardware notes:
This comes with the 3 nozzle heads you see in the picture, 1 is for the resin, 2 are different sizes for hardener containers of differing spout sizes. There is also extension tubing included for if you need to fine tune the length of the nozzles.
This is the pump kit specifically designed to meter the correct amount of chemical for the West System epoxies. Their system is a 3:1 ratio.
These pumps seem to be well made, sturdy, and come with different length feed tubes to fit two different size cans; very convenient.
But in operation, they don't work so well. During the upstroke, they occasionally suck in air from the seal at the top of the pump. This results in the next pump delivering an incorrect amount of chemical. An incorrect amount of chemical results in weak epoxy. This problem seems to happen more with the pump used in the hardener can.
I tried several pumps from each chemical squirted into separate cups as a test. I then poured the chemicals back into the cans when done. I found that if the pump handle is very carefully pumped down while applying a slight lateral pressure in one direction, then I get more reliable results. Then doing the same procedure on the upstroke. However, it did not work 100% of the time.
I talked with a friend of mine, who has been working with West System epoxy for several years, and he said it has been a problem for years.
I would have expected a better product from West System considering how great their epoxy is.
The only other option is to pour the chemicals in graduated cups to get the right mixture, but this is not as practical if you are mixing several small batches.