An oscillating sprinkler is specially designed to facilitate assembly, as well as disassembly for purposes of repair of replacement of parts, without sacrifice of water-tight integrity and with improved operating characteristics. The housing for the impulse wheel and for supporting one end of the sprinkler tube is formed of two parts snapped together to effect the necessary seal, the sprinkler tube is mounted therein by a snap action insertion, thereby to define an operating subassembly, and that subassembly is reliably assembled with a mounting subassembly by sliding insertion and snap action retention. The sprinkler tube is sealingly journaled in such a manner as to produce very low friction, thus reducing the load on the impeller wheel and enabling the sprinkler to have a very low pressure drop therethrough, thereby increasing the sprinkling range of the device. The linkage between the impeller wheel and the sprinkler tube is manually accessible and is provided with a snap connection so that the linkage can readily be manually disconnected and connected. The construction lends itself to producing a low-profile, low cost unit.

A self-regulating mixing valve has a main housing having hot- and cold-water inlets and provided with an externally threaded stem defining an axis, a valve body displaceable axially in the housing between hot and cold end positions blocking flow from the inlets and through intermediate positions permitting flow from both inlets, and a thermostat in the housing connected to the valve body. An abutment ring fixed on the housing around the stem is provided with a stop. An adjustment nut threaded on the stem adjacent the ring is axially operatively engaged with the thermostat so that rotation of the nut in one direction about the axis axially displaces the thermostat in one direction and opposite rotation axially oppositely displaces it. A protective sleeve centered on the axis and fixed on the ring extends axially outward from the ring coaxially around the sleeve and projects axially outward past the sleeve. An adjustment knob having an annular skirt engaging coaxially between the protective sleeve and the knob is provided with another stop angularly engageable with the stop of the abutment ring to limit angular displacement of the knob on the stem. Interengaging axially extending formations on and between the knob and the nut rotationally couple same together while permitting same to move axially relative to each other. A screw engaged axially between the knob and the nut and fixes the knob axially to the nut.

An oscillating lawn sprinkler (4) has a spray pipe (7) pivotally mounted on a sprinkler body (5). The spray pipe (7) is driven to oscillate by water pressure through a motor mechanism disposed in a driving mechanism compartment (6). The driving mechanism compartment (6) is connected to a supply of water on one side thereof and with one end of the spray pipe (7) on the other side thereof. An adjusting mechanism is provided for adjusting the flow rate of water delivered by the spray pipe. Furthermore, a mechanism for adjusting the oscillating range of the spray pipe has a control member (9) disposed on the same side of the driving mechanism compartment (6) as a control member (26) of the water flow rate adjusting mechanism. Both the control members (9, 26) are disposed on the side of the driving mechanism compartment opposite to the spray pipe (7). A filtering mechanism is removably housed at a water supply inlet connection (8) of the oscillating sprinkler (4) for filtering the supply water.