3/4 inch Carbon Steel 417G Gas Press Cap

3/4" Apollo PowerPress® Carbon Steel Cap – Press Connection End Closure for Piping Systems

The 3/4" Apollo PowerPress® carbon steel cap is a press-to-connect fitting used to terminate carbon steel piping systems in mechanical, hydronic, and gas applications. Designed for use with Schedule 10 to Schedule 40 carbon steel pipe, this fitting provides a permanent end-of-line seal using a flame-free pressing process, eliminating the need for threading or welding.

Manufactured from ASTM A420 carbon steel and pre-fitted with a factory-installed HNBR sealing element, the cap is engineered for fast, repeatable installations while maintaining system integrity under pressure. It is compatible with standard press tools using V-profile jaws.

Technical Specifications

• Nominal Size: 3/4 inch
• Material: Carbon Steel (ASTM A420)
• Seal Material: HNBR (Hydrogenated Nitrile Butadiene Rubber)
• Connection Type: Press-fit (V-profile)
• Pressure Rating: Up to 300 PSI for air and liquid service
• Temperature Range: -40°F to 250°F (with HNBR seal)
• Standards: Complies with ASME B16.3, ANSI LC 4 / CSA 6.32, and NSF 61/372 (select applications)

System Benefits

• ✅ Flame-Free Installation: Eliminates hot work requirements and reduces risk in occupied buildings
• ✅ Leak Before Press® Feature: Ensures unpressed connections are easily identified during testing
• ✅ Consistent Sealing: Factory-installed elastomer seal delivers uniform performance across all press points
• ✅ Time-Efficient: Reduces labor time compared to traditional methods

Installation Considerations

Pipe ends must be cut square, deburred, and marked to proper insertion depth before pressing. Only use press tools and jaws approved by the manufacturer. Press connections must be visually inspected and tested according to project specifications and code requirements.

Common Applications

This 3/4" press cap is used in:

• Hydronic heating and chilled water systems
• Low-pressure steam condensate return lines
• Compressed air and inert gas piping
• End-of-line service isolation in mechanical rooms

Field Note

HNBR seals are designed for hydrocarbon gas compatibility and are suitable for use in natural gas and propane systems, subject to local jurisdictional approvals. For potable water applications, ensure the product variant meets NSF certification requirements.

The Apollo PowerPress® 3/4" carbon steel cap provides a high-integrity solution for terminating press-fit piping runs. Its reliability, code compliance, and fast installation method make it a preferred component in modern mechanical piping design.