forming a feed port;

arranging a channel to couple the feed port to an actuation chamber;

configuring a solenoid valve to controllably block a connection between the feed port and the channel, wherein pressure from the feed port builds up in the actuation chamber based on the solenoid valve unblocking the connection;

arranging a piston in communication with the actuation chamber;

disposing a disc to close off an inlet port, wherein the piston is configured to travel through the inlet port and burst the disc based on the pressure in the actuation chamber; and

coupling an outlet port to the inlet port;

pressurizing a container containing a volume of fire suppressant agent and ullage absent the fire suppressant agent, the container in flow communication with the feed port and the inlet port,

wherein the piston is configured to be driven toward the container to initially burst the disc via pressure of the ullage on the piston when the solenoid valve unblocks the connection.