Product details
Weiss Cap and Chain | Accessory for Test Plugs | Brass
Product Description
The Cap and Chain is the primary safety and protection component for all Weiss “BP” series test plugs. Its function is twofold: first, it acts as a secondary mechanical seal to ensure that even if the internal self-sealing core is slightly compromised, no fluid will leak from the system. Second, it protects the internal valve core from debris, dust, and corrosion, which is essential in the construction environments of Dubai and Abu Dhabi.
The Chain (or in some modern versions, a high-strength plastic retainer) serves as a tether, permanently attaching the cap to the body of the test plug. This prevents the cap from being misplaced or dropped during system diagnostics, balancing, or commissioning—a common issue in busy mechanical plant rooms.
Key Features
- Secondary Safety Seal: The threaded brass cap includes an internal gasket to provide a 100% leak-proof secondary barrier for the pressurized system.
- Durable Brass Construction: Resistant to corrosion and mechanical damage, ensuring long-term protection in the humid and saline UAE climate.
- Integrated Retainer: The chain or strap keeps the cap securely attached to the test plug body, eliminating the risk of lost components during testing.
- Debris Protection: Keeps the internal Neoprene or Nordel valve core clean and free from grit, ensuring a reliable seal during probe insertion.
- Universal Fit: Designed to fit standard Weiss BP series test plugs (BP25 and BP50 models).
Technical Specifications
| Specification | Details |
| Brand | Weiss Instruments |
| Product | Cap and Chain (Replacement Part) |
| Material | Brass (Cap) / Stainless Steel or Plastic (Tether) |
| Seal | Gasketed Interior |
| Compatibility | All Weiss BP Series Test Plugs |
| Function | Protection and Secondary Sealing |
| Application | Chilled Water / HVAC / Domestic Water |
Frequently Asked Questions
- Q: Is the Cap and Chain mandatory for a test plug?
- A: Yes, for safety and system integrity. The cap provides a secondary seal that is required by most mechanical specifications in the UAE to prevent accidental leaks if the internal core is damaged.
- Q: Can this be used on other brands of test plugs?
- A: While many P/T plugs use similar threading, it is designed specifically for Weiss BP25 and BP50 series plugs to ensure a perfect, leak-proof fit.
- Q: Does it come in different sizes?
- A: Most Weiss test plugs use a standard-sized cap regardless of whether the process connection is 1/4″ or 1/2″, making this a versatile spare part for maintenance teams.