CMP 2.5" Check Valve Flapper Assembly (25830-250-900) marathonelectric Split nuts are useful when

Split nuts are useful when servicing heater unions because they can often be installed without fully disassembling surrounding plumbing

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This replacement is especially useful when the original switch is broken

or become unreliable but the rest of the system can still be serviced

Union-style valves are useful because they allow the valve to be serviced or replaced more easily within the plumbing line

CMP 2.5" Check Valve Flapper Assembly (25830-250-900) marathonelectric Split nuts are useful whenThe CMP 2. 5 inch check valve flapper assembly is designed for compatible valve service applications where the internal flapper component needs replacement. A flapper assembly is useful because it is the moving internal part that helps the check valve allow one way flow while preventing reverse movement through the line. This replacement is especially useful when the original flapper is worn, damaged, warped, or no longer sealing correctly. Replacing