housing h thus the inner surface 32b of the wash pipe 32 and the inner surface 28c of the lower housing portion cooperate to form a well fluid flow passage through the lower portion of the housing h as illustrated in fig2 a and 2b a longitudinally movable tubular operator or valve control member 40 is mounted with the housing h the control member 40 forms an upwardly facing annular shoulder 40a disposed adjacent the shoulder 20f of the upper housing portion 20 and which defines the upper end of the control member 40 the control member d forms an inner surface 40b which terminates at a downwardly facing annular shoulder 40c fig2 b defining the lower end of the control member 40 the downwardly facing annular shoulder 40c engages the upper end of a biasing or urging spring 42 disposed between the shoulder 40c and the spring keeper 34 for normally maintaining the control member d moved to the upper position illustrated in fig2 a and 2b extending upwardly from the downwardly facing annular shoulder 40c is an outer constant diameter surface 40d that is disposed adjacent the intermediate housing portion 24 the control member d carries an o ring or seal means 44 for blocking passage of fluids between the control member d and.