there is disclosed an improved spray tip for airless spraying of liquids in which the spray orifice is mounted in a rotatable turret member which is captured in a subassembly of a plastic spray guard and a tubular metal housing . the housing has a longitudinal through passageway which receives a floating piston seal member that has a forward , cylindrically concave face which is urged into a tight seal against the rotatable turret member by the liquid pressure which acts on the upstream face of the floating piston seal member . the floating piston seal member is sealed in the longitudinal through passageway by an annular seal which also restrains the turret member against rotation when the liquid pressure is released , thereby freely permitting substitution of spray orifices by interchanging of turret members . the turret member includes a handle with a dependent prong which is received through a slotted aperture of the spray guard into an internal cavity of the spray guard body having one side wall with shoulders which provide abutment stops for the turret member , thereby aligning its transverse bore with the longitudinal passageway through the housing .