Carvin Black Union Nut (14427306R) sloanled Replacing the complete lid is

Replacing the complete lid is often the cleaner

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it helps support cleaner installation and more dependable placement along a compatible safety or divider rope

A refractory kit is useful because it helps protect the internal burner area from heat exposure while supporting the intended combustion environment inside the heater

OEM Pentair/Sta-Rite side-mount valve diverter

Carvin Black Union Nut (14427306R) sloanled Replacing the complete lid isThe Carvin union nut is designed for compatible plumbing applications where a serviceable union connection needs secure fastening. A union nut like this is useful because it helps hold the removable connection together while preserving the ability to disassemble the joint for future service or replacement work. This black replacement is especially useful when the original nut is cracked, stripped, cross threaded, or missing. Restoring the correct