A method for delivering water through a fire hydrant is disclosed and includes unlocking a sprinkler cap control lock on the fire hydrant, removing the sprinkler cap control lock to access an operating nut of the fire hydrant and activating the operating nut to deliver water through a plurality of sprinkler ports in at least one of a plurality of caps on the fire hydrant. Also disclosed are fire hydrant with a lubricant channel and a method of lubricating a fire hydrant operation nut. Also disclosed is a fire hydrant that does not need a lubricant disposed between the operation nut and the fire hydrant body due to an operating nut sleeve being disposed between the operation nut and the fire hydrant body.

A fluid valve with a single shaft-sealing module is disclosed. The single shaft-sealing module allows the annular shaft sealing rings to be squeezed to slightly deform to prevent gaps being formed between the shaft and the inner surface of the valve body, and facilitates easy clean and/or replacement of the worn shaft sealing rings.