Silent check valve-or non-slam check valve-is perfect for the fire pump discharge side because it stops water hammer before it even starts.
Traditional swing checks are slow. They wait for backflow to slam the disc shut, and that "thud" eventually ruins your gauges and joints. But a silent type uses a heavy-duty spring to close the disc the split second the pump stops. No slam, no noise. It's fully compliant with fire safety codes and handles high pressure much better. If your pump room sounds like a construction site every time it runs, switch to Keylion Valve. It's a simple technical fix that saves your pipework long-term.
