OATEY 33950 1/2" Insulating Pipe Clamp (50 in polybag)

The Oatey 33950 is sized for 1/2 inch pipe. It wraps the line and isolates it from the framing or strut it is fastened to, so size the clamp to the pipe you are supporting, not to the hole or stud spacing.

Yes. The 33950 is rated for a 0F to 180F temperature range and Oatey states it can be used on hydronic systems. The ribbed body allows faster cooling and lets the pipe expand and contract inside the clamp instead of binding against it.

That is what the insulating clamp is for. The polypropylene body cushions the pipe where it passes the framing, which reduces water line noise and vibration transmitted into the structure. It also absorbs the ticking you get from a pipe sliding against a metal strap as it heats and cools. For a whole-building complaint, replace the clamps at every support point along the run, not just at the loudest spot.

No. The 33950 is molded polypropylene rather than metal, so there is no corrosion at the clamp and no dissimilar-metal contact with copper. That is the reason to choose an insulating clamp over a bare metal strap or two-hole strap in the first place.

The 33950 ships 50 clamps in a polybag, which is why it suits repipes, multi-family rough-in, and MRO stock where you are setting supports every few feet along a run rather than buying one or two.

No. The 33950 tops out at 180F, so keep it to domestic hot and cold water and low-temperature hydronic runs. For steam or anything running hotter, use a metal support with a high-temperature insulating shield instead.

Each clamp weighs 0.026 lb, so a 50-count bag is negligible weight on a cart or in a van stock bin. The all-plastic build means no sharp metal edges on the pipe when you are working overhead.