The PWRW: Portable Wide-Range Waterer





Introduction: The PWRW: Portable Wide-Range Waterer

This is a garden waterer made from commonly available parts. Technically, it is completely modular, so using couplers and other stuff you could link several together to water a whole garden at once. This is just a one-row version.

Step 1: Materials

You will need:

3 Pieces of 1/2" Schedule 40 PVC. Make it several inches taller than your tallest plant that you will be watering. Also, be sure to allow ample room to stick the pipes into the ground.

1 10-foot long piece of 3/4" Schedule 40 PVC. I chose 10 feet because that's about how long my garden is.

1 3/4" end cap for the PVC.

1 3/4" smooth to 3/4" female threaded adapter.

3 Metal Pipe Straps.

6 Screws to hold in pipe straps (must be same size as pipe strap holes)

3 1/2" diameter tee connectors.

Dremel (optional)

Step 2: Make the Support Towers

Take the three 1/2 " PVC tees and place the pipe straps on top. Mark where the pipe strap holes are, then drill them out with whatever size drill bit fits the screws you're using. Fix the pipe straps onto the tops of the tees by screwing in the screws. Stick the tees on the three pieces of 1/2" PVC. You've just finished the supports.

Step 3: Prepare the PVC

Drill a whole bunch of holes in the PVC as shown in the picture. These will provide the water shower for the plants. I used a drill bit the size of my Dremel collet, so anything similar to that should work. Use a Dremel if you have one, since they're lighter than a drill and make drilling the pipe much easier and faster. Be sure not to make the holes too big, and be sure to only drill them on one side, not all the way through. Stick the end cap on one end.

Step 4: Put It in Your Garden

Stick one of the supports in on one side. Stick the open end of the 10-foot pipe into the pipe strap. Next, place another support in the middle of the garden. Stick the pipe through that. Then, do the last support on the other end of the garden and stick the pipe through that. Attach the threaded end of the adapter to the hose as shown in the picture, then stick that onto the open end of the 10-foot pipe.

Step 5: Turn on the Hose

Wonder what you're supposed to do in this step...



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    That pvc coupler in your last picture is female pipe thread on both ends. You might consider getting a male pipe thread to female hose thread adaptor--just a nitpick.

    3 replies

    Actually, maybe I'm not understanding, but the side going to the hose is threaded and the end going to the PVC is smooth, since the PVC I used had no threads. Light duty hoses are sometimes smaller in diameter, so anybody who uses those would need to get a smaller coupler.

    Oops! My mistake. I meant to point out that in plumbing 3/4" pipe thread is different from hose thread--so you might want an adaptor.

    My garden hose must be a different kind then, because the 3/4" pipe thread I had fit right onto it.

    All of these comments about even water flow. How about this, Use a hose "Y" and connect a hose to each end of the pipe. The water will be more evenly distributed and only the center will have lower pressure and volume.

    I dunno, I think for watering plants the pressure doesn't matter, but the flow looked pretty even from a distance... I couldn't be sure, though.

    1 reply

    There will be a difference in pressure from one end to the other, with that design. That will mean a difference in waterflow. If it's a small difference, it won't matter. But if, say, one end is putting out twice as much water as the other, it would matter. If it's only 20% more, it probably won't. You won't know which is the case unless you measure it. You'd want to measure how much water it's putting out, anyway, since you'll want to know how long to leave it running.

    how bout smaller holes at hose end graduating to larger at the cap end

    1 reply

    Yep. Or having the holes closer spaced at one end than at the other. Or you could simply turn it around, half-way through your watering. Or it may be that the difference isn't enough to matter. Measuring the flow rate will let you know.

    I'd not expect that design to produce even water flow - the water at the hose end will be at lower pressure than at the end-cap end, so more water will be emitted. Is it enough to matter? Can't say. Try grabbing a pair of matching tall glasses, and set one beneath each end. It shouldn't be hard to tell if its watering unevenly.