In the summer of 2001 I decided to build a large outdoor cage with a built in watering system.  All parts came from Home Depot.  The cage was constructed of 1 1/2" PVC pipe covered with Pet Screen.  The main claim to fame for this cage design is that the cage it's self became the water pipe.  I ran tap water through a sprinkler valve and then into the base of the cage.  I screwed nozzles into the top of the cage.  When the timer caused the sprinkler valve to open, water would flow into the cage and a fine mist would come out of the top of the cage. 

First cut the lengths of PVC pipe as desired.  I went for 4 x 7' so I made 8 lengths of 4' and 4 lengths of 7'.

The lengths are assembled with standard plumbing joints and plastic cement glue.  Be careful - cement glue doesn't come off easily.  You will also be threading some of the corners so you have to get the order right - you can't thread pipe if it's already glued into the frame.

I placed a T Joint in the bottom section to attach to the water supply. 

I later changed the plastic tube for reinforced plastic pipe.  The regular stuff expanded in the sun and burst!  Good thing the cage was outside!

You can screw in water sprinkler nozzles anywhere in the cage.  I put in 2 at the top of the cage.  Make sure to drill the hole before you glue in the pipe.  That way if you break the pipe you can try again easily.

    The water supply is run through a sprinkler valve which is on a timer.  I added a plastic water container with an aquarium heater inside to take the chill off the water.  I used a plant mister from Home Depot and drilled an outlet at the bottom of the container.  Make sure to keep the hole for the electrical supply to the aquarium heater small and seal it well.  Adapters were needed to adjust the size of the hose. 

The finished product was covered with Home Depot "Pet Screen".  I had the entire family help sew the cage cover using fishing line for thread.  This was the hardest part by far! 

You can see that the mist makes a very fine spray inside the cage and forms nice droplets on the leaves.