Bend radius for polybutylene pipe

Plumbing · Introduction · printed page 270 (PDF page 271)

Book index entries

Plumbing – Bending Radius for Polybutylene Pipe Polybutylene Pipe – Bending Radius Radius of Bending for Polybutylene Pipe Supply Plumbing – In-house

Text in the illustration

supports for horizontal piping should be every 32 inches according to some
floor framing
polybutylene pipe
D (pipe diameter)
bend radius 12 × D
a bend radius of at least 12 times the diameter of the pipe will help prevent the pipe (especially the hot water piping) from collapsing at the middle of the bend
foundation wall
water meter
main shut off valve
cross section

Generated explanation

A building cross section shows polybutylene supply piping rising from a water meter and bending into a horizontal run beneath wood floor framing. The bend radius is marked as 12 times the pipe diameter, with a note explaining that this minimum radius helps prevent collapse at the middle of the bend, especially in hot-water piping. Supports secure the horizontal pipe beneath the framing, and an annotation states that supports should be every 32 inches according to some. The lower portion shows the water meter and main shutoff valve beside a foundation wall, with the floor slab and exterior soil also visible.

Components

polybutylene supply pipe pipe supports water meter main shutoff valve pipe fittings floor framing foundation wall floor slab

Materials

polybutylene wood concrete soil gravel