This seems simple but my only solution uses a bit of 3/4" PVC pipe
I have mounted to a scrap of 1×4 vertically. Can you think of something better?

? proper rough dimensions to accommodate the desired fixtures ?

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"Measure Twice & Cut Once" - Retired U.A. Local 1 & 638

i feel your pain..

i have cut a piece of 4 inch PVC in half lengthwise and stood one half upright under the hose and weight.

each situation is different depending on the location of what it is that is in the way.

I don't understand the problem. I try to picture it and still don't get it.

I believe the OP is referring to the pullout sprayer hose getting looped around the angle stop and needing a guide to keep that from happening.

For some reason I was picturing a coil of garden hose on the exterior getting caught, so this is about the pullout or pulldown kitchen faucet hose usually with a donut weight and when pulling up getting caught if the shutoff valves are protruding from the wall.

In my limited experience, I the hose does not get caught on the actual supply piping, but more so on the shutoff valves, especially the traditional multi turn valve where the turn knob with two pointed ends, the hose slides along the pipe but a multi turn knob stops it.

What I did was I changed them to compression quarter turn valves. A quarter turn valve has a small tear shaped knob, and with a compression connection, you can orient the valve such that when turned on, the pointed end of the knob goes up, and the faucet tubing connection also point up, this means the bottom has no interference. So when I pull on the hose, even if it's caught on a pipe, it will slide out and not be caught by the faucet tubin or by the valve knob.

Sorry for my vagueness. It's the spray hose
under the kitchen sink. The cold pipe is 15"
below the sink; the hose reaches 21" below.
I already have a quarter-turn angle stop
valve. The hose catches on the pipe. Here's
a picture:[ibb.co]

Can you remove the angle stop, install a 90* and relocate the stop somewhere to the left of where it currently is? To prevent this issue, when I can, I install the in-wall piping and stops away from the center of the faucet location.

16-8-22

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"Measure Twice & Cut Once" - Retired U.A. Local 1 & 638

bern, those are old school numbers.

nowadays there are a few factors that don't allow your numbers to work.

alot of customers choose a faucet with a pull down hose feature. these have that big donut shaped weight at the bottom.
some customers choose a 10 inch deep sink with a 1 HP disposer. the 16 inch rough is borderline too high.

just about everyone has a dishwasher which complicates the below sink piping.

more people are adding a filter of some sort.

anyway i rough kitchen waste at 14-14 1/2 and keep the hot and cold way over to the side the DW is on. the pex stubouts are red and blue so no one can mix them up.

agree

==============================================

"Measure Twice & Cut Once" - Retired U.A. Local 1 & 638

Packy wrote:
>i have cut a piece of 4 inch PVC in half lengthwise and stood one half upright under the hose and weight.

I did something similar. I cut a slot into a piece of 4 inch PVC so that it would slide over the valve while resting on the floor. The slot was just snug enough to put a little tension on the sides of the valve, so no fasteners were required. That worked great for about 12 years until I sold the house.