I have a single-handed kitchen faucet that has a sprayer. The main problem is that it is leaking from the base of the faucet onto the countertop. I recently changed all the innards to the faucet because it was leaking from the faucet top. Can anybody tell me what I should or could do to stop this? I hate idea of having to buy a whole new faucet. I can't tell you the brand name all though I think it is a Delta.

There are two large "O" rings in the column of the faucet. They seem to be in need of replacement. You could do it yourself if you know the model # of your faucet ( to order proper parts ) and if you are reasonably handy. Otherwise, call plumber or handyman for help...