a partially threaded cylindrical valve body 22 with a space of 1 8 inch for example between the outer diameter of seat 20 and the inner diameter of value body 22 valve body 22 includes a short transverse outlet port 24 and an axial inlet port 26 at its lower end ports 24 and 26 may be threaded internally so that they can be connected to fittings and hoses for conducting water to and from the valve a washer 27 prevents direct water flow from inlet part 26 to outlet part 24 cartridge assembly 18 includes ceramic discs 28 and 30 and a seal in the form of an annular washer 32 the discs each include two 34 butterfly 34 openings of which one is shown at 34 when the openings are aligned the valve is 34 open 34 and water flows from the inlet port 26 to the outlet port 24 through a radial slot 35 as will be described further below the upper disc 28 is connected to a stem 36 which terminates in a pinion 38 the handle 10 is secured to a hub 41 which is attached to pinion 38 by means of a machine screw 40 the hub 41 includes a threaded hole 39 in its peripheral wall which receives an elongated machine screw 43 extending longitudinally through handle 10 so that the handle can be attached to the hub when handle 10 is turned moving disc 28 to align the butterfly openings 34 water from the inlet port 26 passes through a pipe not illustrated extending axially through cylindrical seat 20 and through the opening formed by the aligned.