Air Control Internal

The Air Control Internal is the threaded valve mechanism that sits inside the air-control fitting on the spa shell rim. It's the part that physically opens and closes when you turn the cap above it, regulating how much air is drawn into the jet plumbing for a given soak. Replace it when the action goes stiff, the seal starts leaking, or the threads have cross-stripped from years of turning.

What this part does: Each air-control fitting on a spa is a venturi — jet water rushing past creates suction that pulls air down through the control valve and mixes it into the water stream. More air open = more bubbles and a cooler feel; less air = warmer, denser water flow. The Internal is the actual mechanism that opens and closes the air pathway. The cap on top (visible to bathers) attaches to the Internal but does no work on its own.

Will this fit my spa? The Internal is the standard Arctic Spas air control mechanism used across most current and recent-vintage Arctic Spas. If you're not sure your existing fitting takes this Internal, bring the old assembly to one of our three Ontario showrooms for matching — it takes 30 seconds to confirm.

Quick tips:

• If the action is just stiff, try a few drops of plumbing-safe silicone lubricant before replacing — sometimes that's all it needs
• Replace the matching cap (Black Round or Bearclaw Clear) at the same time — the threads engage as a set
• Drain the spa below the air-control level before replacing — it's much less wet than swapping it with the spa full