OEM replacement 2" union ring (nut) for Aqua Ultraviolet UV sterilizers and filters. Replaces cracked or stripped rings to restore a secure, serviceable, leak-free connection.
Genuine Aqua Ultraviolet 2" union ring
Durable, chemical- and UV-resistant white polymer
Knurled/ergonomic profile for easy hand-tightening
Works with factory union halves and O-rings for drip-tight seals
Fits Aqua Ultraviolet Classic / SL / Ultima components that use 2" slip/socket unions
Pairs with the standard 2" union body/half and 2" union O-ring (O-ring not included)
Part: Union ring (nut) — 2", white
Material: Corrosion-resistant engineered polymer
Use: External plumbing; non-submersible component
(1) 2" white union ring (nut only; O-ring and tailpieces sold separately)
Inspect union faces and replace the O-ring if flattened or cracked.
Lightly lube the O-ring with silicone-safe grease and seat it in the groove.
Align union halves and thread the ring on hand-tight, then snug—do not overtighten.
Pressurize and leak-test.