Drain Pipe: About 16-20 inches above floor. We will consider the drain pipe to be a vertical centerline.
Supply Lines: Two holes. One hole is 4 inches to the right of centerline, another hole is 4 inches to the left of centerline Vertically, both holes are about 2-3 inches above the drain pipe.
Placement of Sink: Vertically, the sink should be about 31 inches above the floor. Measure up to the rim of the sink.
Toilet Rough-In Dimensions
Supply Line: One hole, between 5-10" above the floor. Off-set this supply line from centerline by five inches.
Discharge Hole: Off-set this hole from the wall framing by 12 1/2". Consider this hole to be centerline.
Tub Rough-In Dimensions
Shower Stub: 80". This is the highest point, the place where the shower nozzle will go. We will consider this centerline.
Tub Spout/Stub: 26"-35" high. Place this on the centerline.
Faucets: 10" above tub spout. Place one faucet 4" to the left of centerline and the other faucet 4" to the right of centerline.
Drain: Place drain on centerline. Total opening for drain access can be between 10"-14" off-set from framing, and 6"-8" wide.
Hope this helps.