with an agricultural crop spraying system but would find application in substantially any system in which the valves must periodically be removed for service or to significantly reduce the assembly time of any type of liquid handling system a plurality of valves such as valve 20 may be joined into a bank of two or more depending upon system requirements for instance the bank of valves shown generally as 40 in fig1 includes two valves 42 44 joined by t connector 46 interconnecting input connector 48 to outlet connectors 50 52 and 54 fig2 shows the mounting bracket 10 to comprise a rectangular plate 60 with various openings formed therein of various shapes as required by the valves and other system elements round openings such as at 62 accommodate the cylindrical shape of connectors while a rectangular opening may be appropriate for a small control panel such as 66 in each position where a valve is to be located a rectangular retaining tab 70 is formed as by through cutting three adjacent sides of the rectangle and bending the retaining tab slightly forwardly as determined by the intended location of the valve s relative to plate 60 using a relatively light metal with reasonable resiliency retaining tab 70 will function somewhat like a spring or biasing means as will be discussed further below alternatively plate 60 can be formed from a plastic material with characteristics very similar to the metal identified above fig2 and 3 also show a mounting shelf 72 rigidly affixed to plate 60 and extending generally perpendicularly and forwardly therefrom.