3.25 Od Pvc Pipe|Home Depot Clear Pvc Pipe|Material: UPVC,Crafted from durable UPVC, this pipe clip resists corrosion and ensures long-lasting performance. Connection: Flange,Featuring a flange connection, the clip provides a secure and leak-free fit for your PVC pipes. Type: Low-Foot Flat-...
The pieces I used for the top and the bottom I believe are called “Flange Adapters” They look like this http://www.pchemlabs.com/product.asp?pid=1387 . There really isn’t any tension between the floor and the ceiling, but it is fairly sturdy. If you are concerned about stability ...