Hayward Salt Cell Union with O-ring. Hayward G1-132527-20 . This Is One End, Each Salt Cell Uses Two (2) Unions.

Product Includes:

• (1) Union Nut

• (1) Union Tailpiece

• (1) Union O-ring

Used With:

• Hayward Aquarite Salt Systems -AQR3CUL, AQR3XLCUL, AQR9CUL, AQR9XLCUL, AQR15CUL, AQR15XLCUL, AQR925-CUL, AQR940-CUL

• Hayward Aquarite Low Salt Systems - AQR-LS-CUL, AQRXL-LS-CUL

Might be compatible with older models as long as the part number is listed in the product manual