one guy says globes are good for washer connections in residential. A young plumber who got his Master Plumber status this year. One day I'll figure out why he thinks that.
I was hoping globe valves might be a solution to regulate flow. Some problems with excess flow are water hammer with ON-OFF switches like DW and washing machines, noise, and splashing.
Mostly, noise.
Personally I like low-noise plumbing. If water flows without whistling, hissing, rushing, whizzing, without making any noise that I could ever hear on a quiet weekend morning, I like it. I like those little bar taps they sell for less than $30.
I have put two ball valves in series just to lower the noise level they each make when used halfway. This reduces flow while making less of that turbulent noise, since each ball valve is doing half the work...
A hand rinse sink doesn't need the amount of water that 1/2" copper can carry, but instead of reducing to 3/8" or 1/4" copper, I added a ball valve before the angle stop at the flex connector, so as to make each valve do about half the work of cutting flow. Now there is quiet in my bedroom when somebody uses the water at that bathroom sink. Also, when someone turns on the tap all the way, the amount of water is properly adjusted to prevent a lot of back splashing from happening. Open the pipe up all the way, and the experience at the tap is not as pleasant. I can't rely on the faucet's hand lever to do all the work; there is just too much flow blasting out, even with an aerator.
A toilet refill can make a lot of noise. I added a ball valve before the angle stop there too for the same reason. The flow noise is reduced. The toilet tank has enough water for two flushes so I am not concerned about the length of time needed to refill it. Before, when I used the single angle stop to reduce the flow, I ended up with a valve making a lot of noise during refill.
I can see why people like CPVC pipe. Everyone says it is quiet. I must use copper because my building is a highrise (condo apartments). In a concrete structure, background noises are very low. I even have concrete walls, so I never hear the elevator noise. Plumbing noise sounds that much stronger, compared to the quiet environment. In another structure, the problem is not present. A townhouse condo does not have this problem since it is mostly wood structure and it is open to the elements on more sides. Wind and weather make a fair amount of background hum; water flow noises appear less significant. I gave an old computer to a friend in a townhouse condo and the computer made a very acceptable normal fan noise over there at his place. The reason I got rid of it is because of the noise in my place. Especially after I got rid of carpeting and put in tile.
When a dishwasher pulls water through copper pipe, the water flow makes noise. Put that DW in a concrete building and the noise is more audible than it would be in a wood frame building. Put that DW in an open kitchen, an open space, or in a kitchen that has no doors, and the flow in the pipes is a part of the noise you live with whenever you use the DW. Buy a $1000 DW that makes little noise and you have not solved the problem -- you have made it slightly worse since the pipes are now the biggest noise heard.
The pipe is the noise.
Since there are millions more concrete condo dwellers than ten years ago, you will hear more and more queries about how to get quiet or silent plumbing, in the next ten years.
David
p.s. To get a silent computer, get an Imac. The other manufacturers never discuss their noise level.