H2Flow Flow Meter/Check Valve [FlowVis, 2"–2-1/2" Spg, w/ Safety Flapper] (FV-C-S) switches When the air side stops

When the air side stops performing as expected

That helps restore direct user control without broader replacement work

From a merchandising perspective

or Laars SFTM system needs renewed connection hardware for a more complete repair

Specialty screws like this are useful because impeller assemblies rely on correct threading to stay secure during rotation

H2Flow Flow Meter/Check Valve [FlowVis, 2"–2-1/2" Spg, w/ Safety Flapper] (FV-C-S) switches When the air side stopsThe H2Flow FlowVis flow meter and check valve is designed for compatible plumbing applications where flow monitoring and one way flow protection are needed together. A combined flow meter and check valve is useful because it helps display flow rate while also helping prevent reverse flow through the line. This replacement is especially useful when the original assembly is leaking, sticking, inaccurate, damaged, or no longer performing correctly.