The sink whole faucet moves around rather loosely when the spout is swiveled from above. Tried tightening/turning the nut (on that flat plate) there on the middle line with the tool pictured here. It grabbed the nut but couldn't turn it any tighter than it already was, even while holding the faucet tight from above while attempting to tighten that nut. The nut wouldn't budge any tighter, the whole business just wanted to turn while I was trying to tighten. Seeming to come close to damaging/crimping that copper line if I keep up with fighting with it with this method. Probably going about it wrong or something improper about the situation here. Any comments/advice appreciated.











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That basin wrench is not a good tool for that small (5/8 wrench size?) nut. The basin wrench was probably bearing against the two (hot and cold) copper tubes and moving the whole faucet.

A crowfoot wrench and ratchet + extension will tighten the nut. You probably do not have them. You could disconnect the side spray hose and then use a deep socket + ratchet. There might be enough space for a stubby open ended wrench to work.

That faucet must have come with a base plate and, unfortunately, the original installer chose not to use the base plate.

are you sure the nut is as tight as it can get or is it rusted so it won't turn ?

spray some penetrating oil and try loosening it to see if it is turning.

Happened to find a 5/8 crows foot with my tools, so definitely will be giving that a try, with a ratchet and extension. Also, will give a shot of penetrating oil onto that nut, I suspect it might decide to turn/tighten after that. will keep you posted. thanks

Turns out my 5/8 crows foot was too small. (Needed 11/16).
Applied penetrating oil and then borrowed an 11/16 deep socket, after disconnecting the spray hose connection to get access.
With the socket, and with a helper holding the faucet tight from above from turning, was then able to tighten that nut several turns to cinch it down good and apparently solid and tight.
Seems all good now.
Thanks.

nothing succeeds like success...

Several turns! Usually takes 1/8 to a quarter turn to tighten a loose faucet.



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