Amerex PRM End-of-Line Fitting (with Ball), OEM - 16506
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Wholesale PricingThe Amerex 16506 PRM End-of-Line Fitting (with Ball) is the OEM terminal fitting for the Amerex Pneumatic Release Module (PRM) detection line. In a PRM system, the pneumatic detection line is a pressurized tube that runs from the release module through the detection zone. The end-of-line fitting with ball seals the terminal end of this pressurized line, maintaining the system charge pressure throughout the full detection run. Without a properly seated end-of-line fitting, the pneumatic line cannot hold the pressure differential required to detect a fusible link separation.
The "with ball" designation refers to the internal check ball that forms the pressure seal at the line terminus. This ball check design allows the line to be pressurized and sealed without tools, while also providing a clear visual indicator during installation that the fitting is fully seated. It is a critical fire suppression system part that determines whether the PRM detection network will function correctly under field conditions.
This fitting is an essential item on any fire suppression supply order for Amerex PRM systems and should be stocked alongside the 17484 low pressure module and 17515 termination hardware as part of a complete PRM service kit. Using the genuine OEM 16506 ensures dimensional compatibility with Amerex PRM tubing and maintains the UL 300 system listing.
| Feature | Details |
|---|---|
| Manufacturer | Amerex Corporation |
| Part Number | 16506 |
| Fitting Type | End-of-Line Fitting with Check Ball |
| System Compatibility | Amerex PRM (Pneumatic Release Module) |
| Function | Terminal pressure seal for pneumatic detection line |
| Certifications | UL Listed, OEM Original |
Installation
The 16506 must be installed at the terminal end of the PRM pneumatic detection line before the system is pressurized. Ensure the fitting is fully seated and the check ball is properly positioned before connecting the pressurization source. A fitting that is not fully seated will allow pressure to bleed from the line, triggering a false detection event or preventing the system from holding its armed charge.
Pressure Integrity Test
After installation, verify the complete pneumatic line holds pressure at the specified system charge level per the Amerex KP system manual. Any pressure drop during the hold period indicates a leak at the 16506 fitting, at a junction in the line, or at the low pressure module. Identify and correct the leak source before arming the system.
Semi-Annual Inspection
During NFPA 17A semi-annual inspections, check the 16506 fitting for corrosion, physical damage, or signs of pressure weeping. A compromised end-of-line fitting is a red-tag deficiency that must be corrected before the system can be returned to service. Replace with a new OEM 16506 and re-verify line pressure integrity.
Can I use a standard pipe cap instead of the 16506?
No. The 16506 with check ball is specifically engineered for the Amerex PRM system's pressure and dimensional specifications. Using a generic pipe cap would not provide the correct sealing geometry and could prevent accurate pressure sensing by the 17484 low pressure module. Always use OEM fire suppression system parts to maintain UL 300 compliance.
Is this fitting reusable after a system discharge?
The 16506 should be inspected after every system discharge. If the fitting shows no damage and the check ball seats cleanly, it may be reused. However, best practice is to replace the end-of-line fitting during any post-discharge overhaul to ensure the detection line returns to factory-spec integrity as part of complete fire suppression system maintenance.
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