Mid-West Instrument - 845-2 (2) Valve Backflow Prevention Test Gauge.  The 845-2 is in the list of Acceptable gauges from both FCCC & HR-USC and CA-NV AWWA
 
Functions and Applications:
Model 845-2 (2) valve kit provides the capability for testing all brands of reduced pressure principle, pressure vacuum breaker and double check valve backflow prevention assemblies.
∆P RANGE: 0-15 PSID / 0-100 KPA
 
Product Features/Benefits
Over 30 Years of Input from Backflow Technicians
(2) Valve Test Kit
Specially Designed for Testing Backflow Prevention Assemblies
Soft-Seated Brass Needle Valves (with replaceable valve seats)
Test kit is protected with 90 micron filters to minimize plugging with scale, sand, etc. Filter elements can be cleaned or replaced
Portable / Removable from Case
Durable Molded Plastic Carrying Case
Improved Case with Storage Compartments for Fittings & Tools
Test Procedures are Laminated in Clear Plastic
5 Year Warranty
Specifications
Gauge Type Diaphragm Differential Pressure
Dial Size & Range (4 1/2") 0-15 PSID / 0-100 KPA
Differential Pressure Accuracy ± .2 P.S.I.D. (Descending)
Working Pressure: 200 PSIG
Body Material: Glass Reinforced Engineering Thermoplastic.
Wetted Internals: EP Elastomers, Brass and 316 S.S. Metal Parts
Line Pressure Gauge: 1 1/2" 0-200 PSIG
Hoses & End Fittings: Buna-N jacket and liner. Schrader 1/4" brass coupler -
Hose Length: Three (3) each / 5' long (color-coded).
Adaptor Fittings: (3) sets of brass fittings provided for hookup to all standard size test cocks
Gauge Weight: 2.9lbs / 1.3kg
Case: Durable Molded Plastic
Size: 18 1/2" L x 9"W x 9 3/4" H
Temperature Limitations: Maximum 150°F/65°C
 
 NOTE: FREEZING TEMPERATURES MUST BE AVOIDED
It is capable of performing all known test procedures including those recommended by ASSE, AWWA, CSA, FCCC and HR-USC and NEWWA.