I've had the same old sprayer attachment to my kitchen sink for a long time and last week I finally decided to get rid of it. The current sink hose (with sprayer detached) is shown here:
And if you look closely, the hose from the faucet actually has a rubber tube inside it that is the water source:
I went to Home Depot with the older sprayer in hand and found another sprayer of the same size that seems like it should fit. This is the new sprayer head.
To attach the sprayer head, I bought some teflon tape and wrapped it around the threads on the new sprayer head and then simply screwed the sprayer head onto the existing hose. I hand-tightened it since the instructions said not to use a wrench. With everything connected, it seems like it should be fine:
But when I turn on the faucet, I get water leaking out from somewhere in the vicinity of the bottom of the sprayer head. My understanding was that this should be dead simple. The old sprayer head didn't leak and I don't understand why a new one of the same size would leak. Am I missing a washer or something? Does the hose possibly need to be replaced? It's difficult to tell whether or not the leak is from the coupling between the sprayer & end of the hose or whether the hose endpoint itself is leaking.