Saturday, October 1, 2016


After viewing a You-Tube video last year the idea of making a oxalic acid vaporizer has been in the back of my mind.  My electric vaporizer works great, but I was thinking of doing a late February treatment and carting the heavy battery around in the deep snow didn't sound like an easy task.  The video showed an easy to make propane powered vaporizer.

For about $40 I was able to buy all components to build the vaporizer.  You might get by for less by buying the components at a big box store like Menard's or FleetFarm.  The components are:

-6 inch length of 1 inch diameter black pipe threaded on both end
-4 inch length of 1/8 inch pipe (ID) threated on both ends
-Two caps for the pipe
-A piece of rubber to seal the upper cap.
-2 small hose clamps
-2 large hose clamps
-A low cost propane torch with piezeo-electric starter (I used a $20 unit from Menards)
-A 2 foot length of  1/8 inch thick steel strapping
-JB Weld epoxy

The most complex part of the assembly is drilling and tapping the 1 inch pipe to accept the 1/8 inch pipe.  The JB Weld is applied to the lower cap threads and 1/8 inch pipe threads  in order to seal these joints and prevent leakage of the oxalic acid vapors.  Assembly is straight forward and by looking at the following pictures is self explanatory for almost any handyman/woman.  The flame from the torch is pointed at the lower cap which holds the oxalic acid powder.

I plan to use a short length of rubber hose from the vaporizer to the hive.  I will bring this vaporizer to the next club meeting.

                                                 Overall view.  Top cap is not installed.
                                Steel strap can be forced into the ground and makes a good stand.
                                                 Oxalic vapor exiting the exhaust pipe.
                                     You can see the blue flame impinging on the lower cap.

REMEMBER: Oxalic acid vapor is harmful to your lungs and eyes.  Use a respirator or stay upwind.

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