faucethoseplumbing
I am trying to connect a garden hose with the faucet. After connecting and turning on the faucet, the water still squirted out. Please see the attached picture.
I am not sure whether I need a wrench to tighten it, or it is just because the faucet or hose connector are too old. Or in other words, is using a wrench to tighten a hose connector a required procedure?
Actually, it sounds more like a siphon or vacuum breaker working fine. It's not leaking with pressure on. When you turn off the sillcock and release pressure on the hose, it moves the water in the hose away from the sillcock, creating a vacuum at the faucet, which causes the siphon breaker valve to open. Then the water rebounds a bit and some comes out. They have only failed when they leak under pressure, or do not open at all. The brass cap thing on top of this sillcock is the built-in vacuum-breaker. The type described in Steven's answer seems more likely given where you say water is coming out. In either case, I don't see any sign of failure from your description of the behavior.
See the threaded tube? There's a nut threaded on that, which holds the plate in place.
Use a Basin Wrench (or any wrench you can fit in there) to loosen the nut (rotate the nut anticlockwise to loosen it), and the plate will slide out.
If the nut is stubborn, and doesn't want to budge. A good shot of penetrating oil can loosen things up.
Best Answer
It's possible to get the hose screwed on by hand tightly enough that it won't leak if your grip is strong enough; I think the strength required is within the normal range for an adult (mine is relatively strong though, so your mileage may vary). But before you get a wrench, there's a couple of things you should check:
Once you've got those taken care of, try it with the hose screwed on hand-tight. If you're still getting leaks, you can try using a wrench, but remember that tightening is good, over-tightening is bad because you start to deform the rubber washer, which reduces its effectiveness. Get the hose hand-tight, then use the wrench to go another quarter-turn or so. If it's still leaking, it may be time to get a new hose.