Table of Contents
What is above the floor rough mean?
Bathtub AFR (above-the-floor Rough). When installing a bathtub, the AFR (Above-the-Floor Rough) feature provides a few inches of clearance so pipes can be routed without having to break ground or relocate the drain.
What is above the floor rough tub?
Drain pipes can be run beneath a bathtub with an above-floor drain connection (above the floor). The down pipe necessitates a much smaller cut in the slab or floor than what is typically required (pictured below). This simplifies the process of installing on a concrete slab.
What is the rough in for a bathtub drain?
One and a half-inch pipe threaded on the male end will be used to rough in the tub drain. There will be a P-trap in the drain, but the specific requirements for the trap, drain line and vent will vary from jurisdiction to jurisdiction.
How high should a tub drain be from the floor?
Drain pipe (vertical centerline): 16 to 20 inches above the floor; this is the discharge hole. Minimum 15 inches, recommended 20 inches from the centerline of the fixture (the side-to-side buffer). It’s recommended that the front buffer be placed at least 21 inches away from any obstruction.
What is aboveground plumbing?
With an above-floor plumbing system, no holes in the concrete floor are required for drainage. Sludge is reduced to a slurry by a macerator or grinder located behind the toilet and pumped into the drain line through small diameter tubing.
