Pvc is used for the supply pipe and a variety of other purposes, including porch handrails. You can buy vinyl porch railing systems in complete kits, with upper and lower rails, intermediate poles and accessories to attach rails to porch messages. You can get it in a variety of colors, to match different colors of the house; in some cases you can vary colors within a handrail so superior and inferior are different from the messages. Or if you are really inventive, you can create your own plumbing PVC plumbing railing.
Make a plan and buy your railing from the vinyl porch. Count the number of positions needed, if the porch support posts are not already installed, and measure the distance between them; you want no more than about six feet between the posts. Buy your vinyl porch railing, in a kit or in individual items, but make sure all the components are from the same manufacturer.
When a section has been completed, connect a set of accessories to a pole, slide a matching system over one end of the assembled handrail, and then put it in place. Slide the open ends of the vinyl porch railing into the mounted accessories, put the other end in position and then fix the conditioning elements. You can connect accessories with screws.