(For 1/2" 3/4" etc)
I see two types: One type fits around the pipe and uses two screws fastened into the wood (or whatever)
The other has a round copper piece where a large wood screw goes through the middle and then two pieces with two copper screws hold the pipe in place.
The first type seems much easier and cheaper but there must be a reason or specific application for the second type. Anyone know where to use the second type?
1) Where there's possible need to remove the pipe w/o removing the clamp mount. 2) Whereever one wants...
Why would anyone "possibly need to remove a pipe" ? If you have to remove a pipe then the minor holes in the sheetrock are the least of your problems. Secondly, couldn't you pretty easily remove a pipe without removing the clamp mount regardless of which type you use? ie: loosen the screws a little, cut your pipe and pull it through. Sorry, your post made very little sense.
Replace the water heater perhaps??? Many reasons and many piping situations other than the plainest...
If the hanger were mounted permanently (say in masonry or concrete w/ Hilti), removing it isn't necessarily so simple, is it?
Since when does replacing the hot water heater require the removing of pipes? Typically you have minimal modifications to make and not removing entire 10 foot sections of pipe. The hangers are supposed to be used with the copper "wood" screw that is included with it. It is not recommended to mix metals. Masonry? Don't people use tapcons or even lead lags? You make it sound as though anyone installing any pipe has on their mind "I might want to move this one day." I really don't think that is the case.
you didn't ask, but I like the plastic ones.
I assume your second one is where the pipe isn't immediately next to a stud.
You're ok to think what you want...in most instances it isn't required to remove, but there are places/times where having access for future is, in fact, a desired feature or necessity. Normally, one would use unions or other fittings when installing but trust me, there are cases. The water heater was simply a trivial example that you hopefully could begin to at least imagine the possibilities...
Think what you will and I didn't say it's the whole or only reason but one reason to choose...the water heater was simply one trivial example of why one _might_ want/need to have a section of pipe removable to let you try and imagine a reason. I certainly wouldn't expect it to be any more than a short section that would be fitted w/ unions or similar, not a full joint as you seem to think.
It's one reason which I believe is valid -- if you don't like it, fine, create your own.
Ok, Actually here's a much better reason with respect to future modifications. With the hanging type (with a single wood screw in the middle) you can probably cut this pipe using a small tubing cutter and also be able to resolder say a T fitting without having to remove any of this pipe at all and you also won't burn down the house. This is all due to the extra offset that this type of hanger provides.
With the regular hangers you would have a much bigger job.
That's probably the best example. (Your Hilti example was not good - a masonry gun would blow this thing apart. It's thin copper not structural steel.)
HomeOwnersHub website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.