AMERICAN VALVE 1/2-in Dual Pattern Brass Sillcock Valve M72AS
Do NOT purchase this product
... Mine lasted about four years for me before the internal stem/rod cracked. This caused a constant leak when it was turned on. Doing research for parts... I've noticed a lot of reviews on the internet about this same problem as to it leaking through the handle. I thought it was a gasket problem but after analyzing it, it turned out to be the "Integral Vacuum Breaker" system malfunctioning after a few years of use. The tip of the stem is a moveable item loaded on a spring and if it gets stuck closed, the water in the stem/rod does not drain out causing water to stay in the center stem/rod and of course freezing during the winter. When Spring comes and you turn on the system, that's when it leaks in and around the handle.
Another important note: I could NOT find replacement parts i.e. center stem/rod therefore causing me to buy another new Freeze-Proof Sillcock. It doesn't stop here yet....The newer ones are mostly made of aluminum and the center stem/rod is all aluminum
...NOT copper!!! This part being all aluminum which I believe will be a major problem to come!!! As you know aluminum creates lots of oxidation with layers of white aluminum powder. This will now be going through your hoses that might feed your garden/food, your pets water bowls outside and your pools!! This is not good. They need to keep this stuff copper or CPVC but NOT ALUMINUM.Look up "Aluminum poisoning"
I have pictures of this (center stem/rod) and how I fixed the old copper center stem/rod for a back up when my aluminum one I just bought from Lowes fails in a few years. I tested it and it works (my old copper stem/rod)!!! I fixed mine by removing the spring in the tip and putting the tip back in the stem and filling the center of the stem/rod with Liquid Nails adhesive. If I was to do it again, I would use a Rubber Silicon via a tube gun.
My suggestion is to go to the old type of Frost-Free Sillcock "BRASS" NOT ALUMINIUM and doesn't have a hollow center stem/rod
for water to freeze in and also doesn't have the anti-Siphon design. It might be a neat design but when the parts start to oxidize/rust etc. it then will stick and keep the water from being aloud to leave the stem/rod therefore causing a crack and WILL leak when opened during the Spring.