How to Build a Water Spray Rack for Testing Windows Out of PVC Pipes

Drill nine 1/8-inch holes in each 40-inch pipe so they're spaced 4 inches apart and aligned. Screw a spray nozzle in each 1/8-inch hole. Glue one end of each 40-inch pipe into the base of each T-joint so the spray nozzles are facing up when the T-joint lays flat.

Connect all the T-joints by gluing the 8-inch pipes in all of the top holes of the T-joints. All of the 40-inch pipes must be on the same side so they can hang down and all of the spray nozzles must be facing the same direction.

Glue a corner joint onto each 8-inch pipe. One hole on each corner joint should be facing the same direction as the nozzles and the other hole on each joint should be parallel with the 40-inch pipes. Glue a 16-inch pipe into each corner joint so the pair of pipes is at a right angle to the 40-inch pipes.

Apply glue to the 120-inch pipes and insert them into the corner joints so they're parallel with the 40-inch pipes. Glue the corner joints on each of the 120-inch pipes so they bend in the opposite direction of the nozzles and glue the last pair of 16-inch pipes into the corner joints. These are the feet to your spray unit.

Glue the hose adapter to one of the bottom 16-inch pipes and glue the end caps on the remaining three 16-inch pipes.

Set your water spray rack against the outside of your house so the nozzles are facing the window and so the top 16-inch pipes are resting against the exterior. Screw your hose into the adapter and gradually turn on the water until all of the sprayers have water coming out of them.