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A sprinkler assembly includes a housing having an open side; a sprinkler body supported at one end of the housing and adapted to receive a nozzle. A nozzle magazine is attached to the housing along the open side and holds plural nozzles selectively alignable with said sprinkler body. An actuator is

A sprinkler assembly includes a housing having an open side; a sprinkler body supported at one end of the housing and adapted to receive a nozzle. A nozzle magazine is attached to the housing along the open side and holds plural nozzles selectively alignable with said sprinkler body. An actuator is arranged to move a selected one of the plural nozzles from the nozzle magazine into the sprinkler body.

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1. A sprinkler assembly comprising: a housing having an open side;a sprinkler body supported at one end of said housing and adapted to receive a nozzle;a nozzle magazine attached to said housing along said open side and holding plural nozzles selectively alignable with said sprinkler body; andan act

1. A sprinkler assembly comprising: a housing having an open side;a sprinkler body supported at one end of said housing and adapted to receive a nozzle;a nozzle magazine attached to said housing along said open side and holding plural nozzles selectively alignable with said sprinkler body; andan actuator for rotating the magazine to align a selected nozzle with a flow path through the sprinkler body and for moving the selected one of said plural nozzles relative to said nozzle magazine and linearly into said sprinkler body. 2. The sprinkler assembly of claim 1 wherein said actuator comprises a hydraulic or pneumatic cylinder attached to an opposite end of said housing. 3. The sprinkler assembly of claim 2 wherein a hollow piston rod moves within said cylinder, a free end of said hollow piston rod mounting a nozzle insertion tool. 4. The sprinkler assembly of claim 2 wherein said nozzle magazine includes a tray formed with plural openings, each opening receiving a substantially cylindrical nozzle sleeve, each of said plural nozzles supported in a respective nozzle sleeve. 5. The sprinkler assembly of claim 3 wherein said nozzle insertion tool comprises a pusher surface adapted to insert a selected one of said plural nozzles into said sprinkler body, and a pair of gripper arms adapted to remove another of said plural nozzles from said sprinkler body. 6. The sprinkler assembly of claim 5 wherein said pusher surface engages an upper end of said respective nozzle sleeve, and wherein said gripper arms are adapted to engage an underside of a radial flange formed at the upper end of said nozzle sleeve, each of said plural nozzles remaining in a respective nozzle sleeve upon insertion into said sprinkler body. 7. The sprinkler assembly of claim 1 wherein said plural nozzles comprise three nozzles, each having a different flow rate. 8. The sprinkler assembly of claim 4 wherein said nozzle magazine includes a spindle, said tray located adjacent one end of said spindle; wherein upper and lower ends of said spindle define an axis of rotation for said nozzle magazine relative to said housing. 9. The sprinkler assembly of claim 8 wherein an opposite end of the spindle is formed with a compound cam groove adapted for interaction with an actuator cam, said compound cam groove arranged to rotate the nozzle magazine in a first angular direction upon movement of said actuator cam in a first linear direction, and to rotate the nozzle magazine further in said first angular direction upon movement of said actuator cam in a second linear direction opposite said first linear direction. 10. The sprinkler assembly of claim 9 wherein said actuator cam comprises a horizontally-oriented cam post fixed to a nozzle insertion tool. 11. The sprinkler assembly of claim 3 wherein one end of said hollow piston rod is in fluid communication with said nozzle and an opposite end of said hollow piston rod is adapted to connect to a water supply conduit at an opposite end thereof, said hollow piston rod thus providing the flow path through the sprinkler body . 12. A sprinkler assembly comprising: a housing having an open side;a sprinkler body supported at one end of said housing and adapted to receive a nozzle;a nozzle magazine attached to said housing along said open side and holding plural nozzles selectively alignable with said sprinkler body, said nozzle magazine further including a spindle, upper and lower ends of said spindle defining an axis of rotation for said nozzle magazine relative to said housing; andan actuator comprising a hydraulic or pneumatic cylinder for rotating the magazine about said axis of rotation to align a selected one of said plural nozzles with a flow path through the sprinkler body and for moving the selected one of said plural nozzles relative to said nozzle magazine and linearly into said sprinkler body. 13. The sprinkler assembly of claim 12 wherein an opposite end of the spindle is formed with a compound cam groove adapted for interaction with an actuator cam, said compound cam groove arranged to rotate the nozzle magazine in a first angular direction upon movement of said actuator cam in a first linear direction, and to rotate the nozzle magazine further in said first angular direction upon movement of said actuator cam in a second linear direction opposite said first linear direction. 14. The sprinkler assembly of claim 13 wherein a hollow piston rod moves within said cylinder, a free end of said hollow piston rod mounting a nozzle insertion tool comprising a pusher surface adapted to insert a selected one of said plural nozzles into said sprinkler body, and a pair of gripper arms adapted to remove another of said plural nozzles from said sprinkler body. 15. The sprinkler assembly of claim 14 wherein said actuator cam comprises a horizontally-oriented cam post fixed to said nozzle insertion tool. 16. The sprinkler assembly of claim 15 wherein one end of said hollow piston rod is in fluid communication with said nozzle and an opposite end of said hollow piston rod is adapted to connect to a water supply conduit at an opposite end thereof, said hollow piston rod thus providing the flow path through the sprinkler body. 17. A sprinkler assembly comprising: a housing having an open side;a sprinkler body supported at one end of said housing and adapted to receive a nozzle;a nozzle magazine attached to said housing along said open side and holding plural nozzles selectively alignable with said sprinkler body, said nozzle magazine including a tray formed with plural openings, each opening receiving a substantially cylindrical nozzle sleeve, each of said plural nozzles supported in a respective nozzle sleeve;an actuator for moving a selected one of said plural nozzles from said nozzle magazine into said sprinkler body, said actuator compromising a hydraulic or pneumatic cylinder attached to an opposite end of said housing; and wherein a hollow piston rod moves within said cylinder, a free end of said hollow piston rod mounting a nozzle insertion tool comprising a pusher surface adapted to insert a selected one of said plural nozzles into said sprinkler body, and a pair of gripper arms adapted to remove another of said plural nozzles from said sprinkler body, and further wherein each opening in said tray is formed with diametrically-opposed cam slots adapted to engage and compress said gripper arms about said sleeve.