On the inlet cold water pipe to the typical cylindrical, vertical, gas fired hot water heater:
Are most plumbed in with a globe valve, so the water to it can be completely shut off ?
I saw a diagram where they said to use a gate valve. This doesn't make much sense to me, as although a gate valve would allow a consideably greater flow thru it when wide open (less p drop), the globe style allows for a full shutoff, if needed.
Our new water heater seems to have a lesser flow thru it than our old one of ten yrs ago. Wife is quite upset. On looking thru the web, I came across this gate valve picture.
So, which style is commonly used for this application, these days ?
Also, are these new heaters supplied with any kind of "Energy-Saving" restriction like so many newer shower heads ? Any thoughts on why the thruput flow might be lower on the newer one (same size, different mfg.) ?