Hayward Selecta-Flo Valve Diverter (SPX0740C) modular A union nut like this

A union nut like this is useful because it secures the serviceable plumbing connection while still allowing the union to be separated when maintenance or equipment replacement is needed

but the original equipment manual

Threaded body configuration

Helps support traction

Raypak 337A air pressure switch

Hayward Selecta-Flo Valve Diverter (SPX0740C) modular A union nut like thisThe Hayward Selecta Flo valve diverter is designed for compatible valve applications where the internal flow directing component needs replacement. A diverter is useful because it controls how water is routed through the valves available positions, making it one of the most important functional parts inside the assembly. This replacement is especially useful when the original diverter is cracked, worn, deformed, or no longer sealing and switching