Reverse Flow Prevention Coupling :
- AP-1 1/4" (Plug) IMPA 850302
- AP-2 3/8" (Plug) IMPA 850307
- AS-1 1/4" (Socket) IMPA 850301
- AS-2 3/8" (Socket) IMPA 850306
- GS-1 M16x1.5 (Socket) IMPA 850303
- GS-2 M16x1.5 (Socket) IMPA 850308
- OP-1 M16x1.5 (Plug) IMPA 850304
- OP-2 M16x1.5 (Plug) IMPA 850309