EMACO Test & Drain Valve is equipment used in wet pipe fire sprinkler systems to test water flow and drain the system.
The valve combines the inspector’s test function and drain function into one compact piece of equipment. This removes the need for a traditional loop arrangement and makes the installation simpler in the sprinkler pipework.
The valve is designed like a single-handle ball valve. When the handle is turned to the test position, water flows through the test orifice to simulate sprinkler flow. This helps check water movement and alarm operation in the system. When used for draining, the valve discards water from the sprinkler line.
A sight glass is provided on the valve body, which allows water flow to be visually checked during testing or draining. This makes inspection easier and maintenance simpler.
Used in wet pipe fire sprinkler systems for:
- Inspector’s test connection
- Water flow alarm testing
- Controlled system draining
- Sprinkler system inspection work
- Maintenance and service drain points
- Fire protection riser assemblies
Design Specifications:
- Test & Drain Valve for wet pipe fire sprinkler systems
- Available in threaded and grooved models
- Single-handle ball valve operation for test and drain functions
- Working pressure rated at 300 PSI
- Orifice diameter options: 1/2” or 17/32”
- Size range:
Threaded: 1”, 1 1/4”, 1 1/2”, 2”
Grooved: 1 1/4”, 1 1/2”, 2”
- K-factor options include 4.2, 5.6, 8, 14, 16.8, and 25.2, depending on valve size
- Large integral sight glass for visual confirmation of water flow
- UL Listed Test & Drain Valve for fire protection applications
1. What makes the EMACO Test & Drain Valve different from standard test assemblies?
The EMACO model integrates testing, draining, and shutoff capabilities into one compact body. This reduces installation complexity, eliminates multiple fittings, and improves leak protection. The calibrated orifices ensure precise flow simulation, and the built-in sight glass provides instant visual confirmation during system testing.
2. How often should the Test & Drain Valve be used or tested?
It is typically used during routine NFPA 25 inspections, which require annual or quarterly flow tests depending on system type. During each inspection, the handle, orifice, and sight glass should be checked for proper operation. More frequent use may be necessary in high-risk industrial facilities or environments with water quality issues.
3. Can the valve be installed on any type of sprinkler system?
The Test & Drain Valve is designed specifically for wet-pipe sprinkler systems. It can be installed in both new installations and retrofit projects, using threaded or grooved connections. For dry or pre-action systems, separate draining and alarm testing devices are required.
4. What are the common maintenance tasks for this valve?
Routine maintenance includes visual inspection for leaks, cleaning the sight glass, checking the orifice for sediment buildup, and verifying smooth handle operation. Over time, internal seals may need replacement to maintain full pressure integrity.
5. Does the valve support different sprinkler K-factors for accurate testing?
Yes. The valve can be supplied with various machined orifices that mimic the discharge of specific sprinkler K-factors. This ensures the alarm system triggers correctly and matches the system’s hydraulic design. Users can select the appropriate orifice size based on system requirements.
