A multiplexed pneumatic control air system for slurry filtration, the system comprising: a plurality of filter units (7700-1, 7700-2, 7700-3, 7700-4) configured for filtering a slurry; each filter unit comprising a plurality of air pilot valves (7724 1-4) including at least a first air pilot valve associated with a first functional purpose of controlling flow of a first type of fluid on a liquid side of the first air pilot valve, a second air pilot valve associated with a second functional purpose of controlling flow of a second type of fluid on a liquid side of the second air pilot valve, and a third air pilot valve associated with a third functional purpose of controlling flow of a third type of fluid on a liquid side of the third air pilot valve; the first air pilot valves of each filter unit (7700-1, 7700-2, 7700-3, 7700-4) fluidly coupled to a first shared air distribution manifold fluidly coupled to a first electro-pneumatic control air valve fluidly coupled to an air source via a common air supply manifold; the second air pilot valves of each filter unit (7700-1, 7700-2, 7700-3, 7700-4) fluidly coupled on an air side to a second shared air distribution manifold fluidly coupled to a second electro-pneumatic control air valve fluidly coupled to the air source via the common air supply manifold; the third air pilot valves of each filter unit (7700-1, 7700-2, 7700-3, 7700-4) fluidly coupled to a third shared air distribution manifold fluidly coupled to a third electro-pneumatic control air valve fluidly coupled to the air source via the common air supply manifold; a system controller operably coupled to the first, second, and third electro-pneumatic control air valves (7600-1, 7600-2, 7600-3) to control a closed and open position of each electro-pneumatic control air valve (7600-1, 7600-2, 7600-3); the system controller being configured to transmit control signals to change position of the first, second, and third electro-pneumatic control air valves (7600-1, 7600-2, 7600-3) to selectively initiate or stop a flow of air to the first, second, or third shared air distribution manifolds (7703-1, 7703-2, 7703-3) from the air source, wherein the first, second, and third shared air distribution manifolds (7703-1, 7703-2, 7703-3) are air-only flow conduits each fluidly isolated from the liquid sides of the first, second, and third air pilot valves (7724 1-3), respectively. a plurality of filter units (7700-1, 7700-2, 7700-3, 7700-4) configured for filtering a slurry; each filter unit comprising a plurality of air pilot valves (7724 1-4) including at least a first air pilot valve associated with a first functional purpose of controlling flow of a first type of fluid on a liquid side of the first air pilot valve, a second air pilot valve associated with a second functional purpose of controlling flow of a second type of fluid on a liquid side of the second air pilot valve, and a third air pilot valve associated with a third functional purpose of controlling flow of a third type of fluid on a liquid side of the third air pilot valve; the first air pilot valves of each filter unit (7700-1, 7700-2, 7700-3, 7700-4) fluidly coupled to a first shared air distribution manifold fluidly coupled to a first electro-pneumatic control air valve fluidly coupled to an air source via a common air supply manifold; the second air pilot valves of each filter unit (7700-1, 7700-2, 7700-3, 7700-4) fluidly coupled on an air side to a second shared air distribution manifold fluidly coupled to a second electro-pneumatic control air valve fluidly coupled to the air source via the common air supply manifold; the third air pilot valves of each filter unit (7700-1, 7700-2, 7700-3, 7700-4) fluidly coupled to a third shared air distribution manifold fluidly coupled to a third electro-pneumatic control air valve fluidly coupled to the air source via the common air supply manifold; a system controller operably coupled to the first, second, and third electro-pneumatic control air valves (7600-1, 7600-2, 7600-3) to control a closed and open position of each electro-pneumatic control air valve (7600-1, 7600-2, 7600-3); the system controller being configured to transmit control signals to change position of the first, second, and third electro-pneumatic control air valves (7600-1, 7600-2, 7600-3) to selectively initiate or stop a flow of air to the first, second, or third shared air distribution manifolds (7703-1, 7703-2, 7703-3) from the air source, wherein the first, second, and third shared air distribution manifolds (7703-1, 7703-2, 7703-3) are air-only flow conduits each fluidly isolated from the liquid sides of the first, second, and third air pilot valves (7724 1-3), respectively.