Abstract: Discloses a guide means for an indicating check valve and leak indicator utilized for indicating the position of a valve closure means relative to spaced apart inlet and outlet ports. The invention involves the use of an elongated cylindrical valve chamber having a cylindrical plug member slidably mounted therein and containing a first magnetic means. A second magnetic indicating means situated outside the valve housing and outside the valve chamber moves responsive to the axial movement of the valve closure in said valve chamber. The valve closure means is guided by means of a pin sliding in a groove in the wall of the valve chamber. This guiding means prevents the cylindrical plug valve from spinning around inside the valve chamber during the axial movement between open and closed positions.