O-rings

The $2 part that stops the $200 service call. This collection carries the O-rings and gaskets that seal an Arctic Spas plumbing run: pump union O-rings in 2" and 2.5" (straight and 90°), flat heater-union gaskets, the L-profile heater wetend ring, diverter cap and internal seals for pre- and post-2010 valves, and the small air-control and on/off rings that stop rim drips.

A weeping union, sputtery jets that can't hold prime, or water at the top of a diverter when the pumps run — all of those are usually a tired ring, not a failing component. Replace seals in pairs while you're in there (they age together), lubricate with plumbing-safe silicone, and hand-tighten only. Bring the old ring to any of our three Ontario showrooms for a 30-second match.