When shopping for an industrial or commercial roof drain or replacement part, it is important to be clear with a manufacturer or distributor what you need. Otherwise, you may inadvertently end up with the wrong drain or part or the wrong size, leading to more time that your roof lacks the proper drainage solution.
To help, we’ve complied a list of commonly used roof drain and replacement part terminology, along with descriptions of each and commonly used nicknames. While not a complete list, this should help make sure you are speaking the same language as your sales contact.
Bolt-to-Bolt: The distance from one bolt (or lug) to the next, typically in inches. On a 4-bolt drain ring, it is measured using the bolts directly across the ring from each other, whereas on a 3- or 5-bolt ring the distance is measured from one bolt to the next going around the ring.