Has anyone here tried using the PVC for outdoor drainage as opposed to the PVC for interior plumbing? I went to get PVC supplies today, had everything I needed using the indoor plumbing PVC, then I notice the exterior drainage PVC material. Same parts, thinner material, and quite a bit less expensive. Anyone? Seems as though most of the homemade PVC feeders I've seen here are the thicker material. Has anyone used the thinner kind?