OATEY 33910 1/2 in. Half Clamp w/ barbed nail (12 in polybag)

The Oatey 33910 is a 1/2 inch half clamp, so it is sized for 1/2 inch water line. For other tube sizes you need the matching clamp size, since a half clamp wraps the pipe at a fixed diameter and will not grip a larger or smaller line correctly.

No. Each 33910 clamp ships with a barbed nail, which is what secures it to the stud or joist. The nails are rust resistant, so they hold up in the damp conditions around a water line.

Yes, the 33910 half clamp is rated for use on hydronic systems as well as domestic water lines. It is molded from high impact polypropylene, which is non corrosive, so it will not react with copper or PEX tubing the way a bare metal strap can.

They come 12 to a polybag, each with its own barbed nail, so one bag covers a short run of 1/2 inch pipe hangers without ordering fasteners separately. Model number to order is 33910.

The 33910 uses a ribbed interior that cushions the pipe and insulates against water line noise, which is the usual fix for ticking or knocking transmitted into framing by hot water expansion. The polypropylene body also keeps metal-to-metal contact out of the assembly.

The 33910 half clamp is UPC listed, which is what an inspector in a Uniform Plumbing Code jurisdiction looks for on pipe support hardware. Confirm your local amendments if your area adopts a different code base.

A half clamp like the 33910 is an open, single-piece saddle that nails over the pipe against a framing member, so it goes on fast after the line is run and allows some movement. A full or two-piece clamp encircles the pipe completely and locks it in place, which is what you want where the line needs to be held rigid or is standing off from the framing.

Product weight is listed at 0.125, with a volume of 0.021, so a polybag of 12 adds almost nothing to a mixed truck or counter order.