Abstract: An assembly for permanent mounting to the deck of a power mower, enabling temporary attachment of a garden hose, for the purpose of washing the mower blade and the underside of the deck. The assembly includes a double female threaded fitting, a pipe nipple threaded to the double threaded fitting and passing through the mower deck, and a tee fitting threaded to the pipe nipple. Lock washers secure the nipple in place to the mower deck. The tee fitting has horizontal members disposed below the deck and above the mower blade. The horizontal members are flattened in profile, to conserve space, and serve as nozzles discharging water onto the rotating blade when cleaning. A hole formed in the tee fitting allows escaping water to dislodge grass clippings from the novel assembly. The cross sectional area of the nozzles is at least equal to the cross sectional area of the other water conducting members, so that heavy, concentrated jets of water strike the rotating blade.