The perfect installation sleeve to prevent overstretching and damaging critical second-stage O-rings.

Keep your regulator service precise and reliable with the O-ring tool for the second stage barrel. This specialty installation bullet is custom-engineered for service technicians to safely slide delicate replacement O-rings from service kits onto the balanced second-stage valve spindle without stretching them out of shape.

Overstretching an O-ring during installation can cause micro-tears or permanent deformation, leading to slow leaks and inconsistent regulator performance. This tool provides a perfectly smooth, tapered bridge that allows the rubber to slide effortlessly over the thick, sharp edges of the balanced second-stage barrel structure.

How It Works:

Position: Slide the hollow sleeve tool directly over the second-stage barrel assembly.
Slide: Lubricate the replacement O-ring and gently slide it up the smooth, tapered ramp of the tool.
Seat: The O-ring will drop perfectly into its designated spindle groove without facing friction or sharp metallic edges.

Key Features & Specifications:

Dual-Brand Compatibility: Built specifically for use on Apeks and Aqualung balanced second stages.
Works with the following Part Numbers: Apeks AP2028 Valve spindle and the Aqualung 129146 Valve body.
Premium Non-Marring Material: Precision-machined from high-grade white acetal (POM-C). This ensures an ultra-slick surface finish that won't scratch your chrome-plated components or tear delicate rubber seals.

Technical Details: