SMC (6550090) 1215 Series Brass Check Valve ; 3/4" FNPT x 3/4" FNPT BUNA Activated Alumina1459 and factory-installed bracket with differential

and factory-installed bracket with differential pressure gauge compatibility

Before and after testing

consider using a 90-degree elbow or street elbow to reposition the gauge face

Model Number HI70032P Manufacturer Hanna Instruments Solution Type Total Dissolved Solids (TDS) Calibration Standard Concentration 1382 mg/L (PPM) at 25°C Chemical Composition High-quality potassium chloride in deionized water Package Quantity 25 sachets × 20mL each Traceability Standardized against NIST potassium chloride conductivity standards

SMC (6550090) 1215 Series Brass Check Valve ; 3/4" FNPT x 3/4" FNPT BUNA Activated Alumina1459 and factory-installed bracket with differentialSMC 6550090 1215 Series Brass Check Valve 3 4" FNPT threaded brass check valve with BUNA seal for reliable backflow prevention in residential and light commercial water systems Brass Construction 3 4" FNPT BUNA Seal WHY IT WORKS Prevents Backflow and Protects Equipment One Way Flow Control Spring loaded mechanism ensures water flows in only one direction, protecting pumps, tanks, and filtration equipment from reverse flow damage Brass Body