1st Check Assembly
RK4-375ASTCK1
First Check Valve Assembly for:
Wilkins 2.5" - 4" 375AST
Wilkins 2.5" - 4" 375ASTDA
Wilkins 4" 475ST
Wilkins 4" 475STV
Wilkins 4" 475STDA
Wilkins 4" 475STDAV
3709ST-300
3709ST-300