Abstract: A flow regulator for water or other fluids has a housing with an internal shoulder between its inlet and outlet. The shoulder faces the inlet and slidably supports an elastically deformable annular flow restrictor which cooperates with a centrally located stud to define an annular passage extending from the inlet to the shoulder and followed by an annular portion of the channel between a conically diverging stepped or roughened internal surface of the housing and a stepped or roughened conical external surfaces of a guide member which carries the stud. Deformation, and hence the flow restricting action, of the flow restrictor depends upon the pressure differential which is established by the conveyed fluid.

Abstract: A check valve wherein a tubular housing confines a reciprocable valving element which is biased by a spring so that it normally engages a seat between the inlet and the outlet of the housing. The valving element is guided by a plastic core which is installed in the housing and has axially parallel guide members for the head of the valving element. One end of each guide member is integral with an annular stabilizing section which is received in a complementary internal socket of the housing, and the other end of each guide member is integral with an annular main section which is coupled to the housing by male and female detent members. The main section surrounds a sleeve-like bearing which guides a shank of the valving element.

Abstract: Disclosed is a spray adjuster composed of a tubular housing in which a perforated flow dispersing member, a flow deflecting member having a bevelled buffer surface, and an aerating member with a sieve-like outlet are arranged. The bevelled deflecting surface of the deflecting member is inserted in a frustoconical recess in the dispersion member to form therewith an outwardly diverging annular passage including with a central axis of the housing an angle of about 45.degree.. The inclined annular passage transits into a tubular annular passage which is coaxial with the housing, whereby a connection line of an inner edge between the bevelled surface and the cylindrical surface of the deflecting member and the outer edge of the cylindrical recess of the dispersion plate is aligned with the bevelled surface. In this manner, the operational noise of the spray adjuster is considerably reduced.