exceeds the tank capacity due to a failure of the float valve in the toilet supply tank the shutoff spool is actuated by the intensifier piston allowing flow to the toilet to be blocked application_number US 93892604 A description referring to the figures the following is a listing of component names and reference numbers as utilized in the following descriptions device inlet 1 supply orifice 2 shutoff spool chamber 3 outlet diversion 4 outlet orifice 5 outlet port 6 inlet diversion 7 supply port of the control spool 8 control spool 2 piece 9 supply port of the intensifier piston extend chamber 10 intensifier piston extend chamber 11 reciprocating piston 12 intensifier piston retract chamber 13 shutoff spool 14 shutoff spool orifice 15 supply port of the intensifier piston retract chamber 16 control spool pilot orifice 17 control spool pilot port 18 control spool passageway 19 tank port of the control spool 20 drain tank line 21 drain tank 22 shutoff spool biasing spring 23 manual reset button of the control spool 24 shutoff spool seat 25 control spool supply orifice 26 control spool screen 27 exhaust port 28 control spool chamber 29 control spool pilot line pl 1 control spool supply line sl 1 piston first position supply line sl 1 a piston second position supply line sl 1 b the present invention is designed to operate in three different functional modes which will be described in detail below as an operational mode with auto reset function an operational mode with outlet device failure and no reset and a manual reset of the valve in this mode water flows into the device inlet 1 at a specified minimum of 25 dynamic psi diverting.