these sub assemblies include a valve assembly by passable timer delay control and a novel solenoid connector that connects the present invention to an existing boom pump control system on a boom pump truck before discussing these subassemblies it is helpful to review the setup of a typical boom pump truck in its typical use the preferred embodiment of the present invention is used in conjunction with a boom pump truck of the type depicted in fig1 a typical boom pump truck 100 without the present invention incorporated has mounted thereon a boom system comprised of various sections 103 u2013 106 and a discharge hose 50 all of which permit the pumping of the material to its intended destination in use the material is pumped through boom sections 103 104 and 105 to an apex 108 once the material reaches apex 108 it falls by gravity flow through section 106 then through discharge hose 50 to its intended destination also located on a typical boom pump truck 100 is a compressed air supply not shown the first major subassembly of the present invention is hose cuff 30 including an inflatable bladder 36 as shown in fig2 and 3 inflatable bladder 36 is constructed of a flexible material such as rubber or other suitable material inflatable bladder 36 is sized such that when it is filled with air it expands within hose cuff casing 35 and constricts material discharge hose 50 thus substantially blocking the flow of concrete or other slurry material through slurry discharge hose 50 it should be noted that the present.