OATEY 33951 3/4" Insulating Pipe Clamp (50 in polybag)

The Oatey 33951 is the 3/4 inch size. It wraps 3/4 inch pipe and isolates it from the framing member it is fastened to. If you are running mixed sizes on a job, you need the matching clamp size for each run rather than forcing one size over another.

That is what it is for. The polypropylene body separates the pipe from the wood or steel it is strapped to, which cuts water line noise and vibration transfer into the structure. It also lets the pipe move: the ribbed design allows for pipe expansion and contraction rather than pinching the line tight. For property managers chasing tenant complaints about ticking supply lines, re-clamping the accessible runs with these is the usual fix.

Yes, within a temperature range of 0F to 180F. That covers domestic hot water and hydronic systems, and Oatey states the 33951 can be used on hydronic piping. It is not a fit for steam or anything running above 180F.

No. The 33951 is molded polypropylene, so there is no metal in contact with the pipe and nothing to corrode. That also breaks the galvanic path you get when a steel strap sits directly on copper, which is a common reason plastic insulating clamps get specified over bare metal straps.

They are packed 50 to a polybag. That is the buying unit, so a contractor stocking a truck or an MRO storeroom is ordering bags of 50 rather than singles.

No. The 33951 is the clamp only, 50 per bag. You supply the nail or screw that fastens it to the stud or joist, so add fasteners to the order if the crew is not already carrying them.

Order it as Oatey 33951. That MPN is the 3/4 inch insulating pipe clamp, bagged 50 per polybag. Distributors quoting a bill of material should reference 33951 directly rather than a generic size description, since Oatey uses separate numbers for each clamp size.

Each clamp is listed at 0.023 in the product weight field, so even several bags of 50 add very little to a shipment or a truck load. Freight is rarely a factor on these; the practical limit is bag count, not weight.