American Standard Transfer Rod F/Princeton Deck Mount - AMS-M909946

It's the diverter transfer rod for American Standard Princeton deck-mount bath faucets. The rod is the linkage that carries the pull motion from the diverter knob down into the valve body, so when it wears or bends the diverter stops shifting water between tub spout and shower. American Standard lists it as faucet mounting hardware, ordered as part number M909946-0020A.

No. This rod is specified for the Princeton deck-mount configuration, where the faucet and diverter sit on the tub deck. A wall-mounted Princeton valve uses different diverter linkage, so ordering this one for a wall installation gets you a part that won't engage.

Often, yes. If the knob moves freely but water never redirects to the shower, or the rod feels loose and drops back down, the transfer rod is the usual culprit since it is the mechanical link between the knob and the diverter. Replacing it as a unit is cleaner than trying to straighten a bent rod. Note this part is the rod only, not the diverter cartridge or the knob, so if the cartridge itself is worn you'll need that separately.

It's supplied as the transfer rod on its own. American Standard sells it as a single hardware component for the Princeton deck-mount faucet, so plan on reusing your existing knob and trim, or sourcing those as separate American Standard repair parts.

Only for the units with deck-mounted Princeton faucets. Princeton was built in both deck-mount and wall-mount arrangements, and this rod is the deck-mount part. Walk a couple of units first: if the faucet and diverter sit on the tub deck rather than through the wall, M909946-0020A is the right rod to keep on the shelf.

Chrome is the only finish offered, under part number M909946-0020A. In most deck-mount installs the rod itself sits below the deck inside the diverter assembly, so the finish matters far less than on a visible trim piece.