MOTHER's Soda Bottle Garden Sprayer

Our garden sprayer works well under pressure. And you can make it with a soda bottle or two and other odds 'n' ends.

| March/April 1983

Gardening is a source of relaxation for many folks, but it can just as well be a means of putting healthful and inexpensive produce on the table, or even the ticket to a bit of extra income. In any case, spending a lot of money in order to save (or earn) a little doesn't have to be part of the program. This "el cheapo" portable garden sprayer is definitely a minimum-investment item that nonetheless can do the job of a spritzer costing many times more.

To make it, you'll have to pillage your workshop, a trash pail, and the kids' toy box. Your gathered booty should also include [1] the 1/2" plumbing parts called for in our Assembly Diagram, [2] four two-liter plastic soda bottles (which will make up the two pressurized storage canisters), and [3] a football pump. Everything else — six hose clamps, a half-dozen No. 5 x 2" machine screws and nuts, an inner tube's valve stem, two hose barbs, a tension spring, and a 4-foot length of 3/8" plastic hose — can likely be scrounged as well, or purchased for a few dollars.

We found the seat belt that became our shoulder strap in a junked Chrysler, but you can make a sling out of anything from a webbed belt to a piece of rope. Likewise (and this is a choice that'll be affected by both how much you're willing to spend and how often you plan to use your sprayer), although our "deluxe" model features a $12 brass trigger and wand, we found that the head from a bottle of Fantastik brand cleaning liquid (with its siphon tube removed) makes a pretty good nozzle that can be adjusted — or shut down — to suit your needs. (It probably wouldn't hold up as well as the metal unit, though.)

The tools required to tackle this project are equally basic: You'll need only a knife, a screwdriver, a drill with a 1/8" bit, and soldering supplies (even these can be eliminated if you choose PVC pipe and cement instead of copper plumbing components). Teflon thread tape or silicone sealant will also help to make the joints airtight.

The plumbing manifold should be assembled by using our illustration as a guide. Once that's done, you can cut a 5 1/2" length of your 3/8" plastic hose and trim down the valve stem so the tubing can be clamped over it. By threading the stem into the football pump, pressing the spring inside the hose, and clamping the free end to the barb at the long end of the manifold, you can assure a kink-free connection between the air source and the storage tanks.

Then, to hold everything together as a unit, merely lash the manifold to the side of the pump with your 2"-diameter hose clamps — and if possible, use these same fasteners to secure your carrying strap. The remaining 3 1/2 feet (or so) of plastic tubing can be clamped to the free hose barb and to the spray nozzle of your choice.

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