OEM replacement 2" union half for Aqua Ultraviolet UV sterilizers and filters. Quickly restores a secure, leak-free connection when a union half is cracked, cross-threaded, or missing.
Genuine Aqua Ultraviolet 2" union half
Includes new O-ring for drip-tight sealing
Durable, chemical- and UV-resistant white polymer
Enables fast, tool-light disassembly for maintenance or winterizing
Fits Aqua Ultraviolet Classic / SL / Ultima components that use 2" slip/socket unions
Matches the opposite factory union half on your unit (verify style before ordering)
Size: 2" union half (single side)
Ends: Slip/socket to mate with factory union body
Seal: 2" O-ring (included)
Color/Material: White, corrosion-resistant engineered polymer
Use: External plumbing; non-submersible part
(1) 2" union half — white
(1) 2" union O-ring
Shut off pump and relieve pressure.
Separate the union; remove old O-ring and clean groove/sealing faces.
Lightly lube the new O-ring with silicone-safe grease; seat evenly.
Hand-tighten, then snug—do not overtighten.
Pressurize and leak-test.