22 is a flow port 37 that places the condenser side port 24 in communication with the passageway 32 the evaporation side port 26 comprises an opening 38 formed in a side wall of the housing 22 opposite the side wall containing the opening 34 and that communicates with the fluid passageway 32 and a tube 40 that has a first end that is brazed welded or otherwise secured into the opening 38 and projects from the housing to a second opposite end the longitudinal axis of the tube 36 is illustrated as being substantially parallel to the longitudinal axis of the tube 40 with the axes of the tubes 36 40 being offset from one another along the length of the housing 22 the tubes 36 40 could also have other orientations for example the axes of the tubes could be aligned i e inline with no offset in use of the service valve assembly the evaporation side port in particular the second end of the tube 40 is connected to an evaporation unit of the refrigeration system when the service valve assembly is fully installed the second end of the tube 40 is illustrated as being closed so that fluid cannot escape through the second end of the tube 40 until the closure is removed the closure can be integrally formed with the tube 40 as in the illustrated example or the closure can comprise a temporary blockage means removably installed in the tube such as a brazed cap or a sealed plug the tube 40 is also illustrated as having at least one step 42 or multiple steps so that the tube 40 has sections 40 a 40 b of different diameters with the diameter.