Ground about 3 feet then attach your reel to it.
Attach hose spigot to siding.
This will give you a clean cut through the siding.
If you want to hang something from your vinyl siding don t even think about drilling through it to attach a hook to the sheathing.
Measure the length of the short hose that is attached to the hose reel.
If you are using a mounting block you will need to cut out for the block and then pull back the siding to get the backing plate installed.
The connector on the short hose twists onto the threaded end of the hose bib so the hose reel is installed close enough to.
That way you wont ruin your sideing for a hose reel that will likely fall apart in a year.
Find location inside of house and drill a 1 4 inch pilot hole from the inside through the siding.
Hold each piece up to the faucet pipe and mark with a pencil where the pipe will pass through the.
If you need more width to the post just get a 4x8 or nail a cross piece of 2x6 to it before you hang the reel.
This renders the siding vulnerable to moisture and voids the warranty even if you seal the hole.