Product details
Weiss Extended Test Plug | BP50LNR | 1/2″ NPT | 1.5″ Lagging Extension
Product Description
The BP50LNR is engineered for modern HVAC and industrial systems where pipes are wrapped in thermal insulation. The “BP” identifies the Brass Plug body, and the “50” denotes the 1/2″ NPT process connection. The key feature is the “L” (Lagging) designation, which providing a 1.5-inch (38 mm) extended neck.
In the UAE’s climate, chilled water and hot water pipes are heavily insulated to maintain efficiency and prevent condensation. A standard test plug would be buried inside this insulation; however, the BP50LNR extends the test point past the insulation layer, keeping the cap accessible for technicians in Dubai and Abu Dhabi mechanical rooms. The “NR” suffix confirms the use of a high-resiliency Neoprene core, ideal for water and air service.
Key Features
- 5″ Lagging Extension: Specifically designed to clear standard pipe insulation, ensuring the test point is always accessible for probe insertion.
- Self-Sealing Neoprene Core (NR): Provides a reliable, leak-proof seal for water, air, and oil. The core automatically reseals after the pressure gauge or thermometer probe is removed.
- Durable Brass Construction: Resistant to corrosion and mechanical stress, making it suitable for the humid and saline environments of the UAE.
- 1/2″ NPT Connection: A robust mounting size preferred for main piping headers and industrial equipment.
- Secondary Safety Cap: Includes a threaded brass cap with a tether to prevent debris from entering the valve and to provide an additional backup seal.
Technical Specifications
| Specification | Details |
| Brand | Weiss Instruments |
| Model | BP50LNR |
| Extension Length | 1.5″ (38 mm) Lagging Neck |
| Connection Size | 1/2″ NPT |
| Core Material | Neoprene (NR) |
| Body Material | Brass |
| Temperature Range | Up to 93°C (200°F) |
| Maximum Pressure | 1,000 PSI (69 BAR) |
| Application | Insulated Chilled/Hot Water Lines |
Frequently Asked Questions
- Q: Why is the “L” version necessary for chilled water?
- A: Chilled water pipes in the UAE require insulation to prevent “sweating.” Without the 1.5″ extension, the test plug would be hidden, and technicians would have to cut the insulation every time they needed a reading.
- Q: Is the Neoprene core replaceable?
- A: No, the internal core is a factory-installed component. If the seal fails after thousands of uses, the entire plug is typically replaced.
- Q: Can I use this for high-temperature steam?
- A: Neoprene is rated up to 93°C. For systems exceeding this temperature, the Nordel (NP) core version is recommended.
