My sister lives in Rochester, NY. I don't know if it is still code, but it used to be required in that city. You need to check yours. From what I understand, it spreads the weight, and prevents or at least helps, keep the thing from falling through the floor when it leaks and rots the floor out. They didn't trust the connections way back when. Course, Rochester still has a law on the books (at least last time I checked, but not enforced) that says you must preceed your horseless carriage with a guy carrying a lantern to warn of its approach. Certainly would slow the daily commute and increase the marathon runner pool. Government tends to have an awful lot of inertia - things take awhile to get moving, and once going, are hard to stop!