Caleffi 535350HA 3/4" FNPT PresCal™ Pressure Reducing Valve, w/out Gauge (low lead, pre-adjustable)

Pressure reducing valves are devices which, when installed on water systems, reduce and stabilize the pressure of the water entering from the water supply main. This pressure, in general, is too high and variable for domestic systems to operate correctly. The 535H series pressure reducing valves, ideal for residential and commercial applications, feature a dial indicator with direct readout allowing easy pressure pre-adjustment. After installation, the valve will control at the pre-adjusted pressure setting. The valve is constructed of DZR low-lead forged brass and incorporates a unique noise reducing and high flow seat design, is easily serviced with a replaceable cartridge and has an integral stainless steel filter (35 mesh), suitable for water systems that may contain sediment and debris. The valve is ICC-ES certified to ASSE 1003, CSA B356, NSF/ANSI/CAN 61 (180°F/82°C Commercial Hot), NSF 372, low lead laws and listed by ICC-ES. It meets codes IPC, IRC, UPC and NPC for use in accordance with the US and Canadian plumbing codes. Plenum rated: compliant with the requirements of standard UL 2043, without the outdoor protective cover.

• Pre-adjustable pressure reducing valve for residential and commercial plumbing applications with protective snap-on cover. 
• DZR low lead "Ecobrass" body.
• Unique noise reducing pressure balanced cartridge. 
• Low friction, anti-scale moving parts.
• High flow seat design.
• Dial indicator with direct readout.
• Replaceable cartridge.
• Integral stainless steel filter.
• Adjustment locking screw.
• Optional outlet pressure gauge.
• Protective cover made from UV stabilized ABS.
• Max working pressure:  300 psi (20 bar)
• Max working temperature:  180°F (80°C)
• Pressure setting range:  15 - 90 psi (1 - 6 bar)
• Factory setting:  45 psi (3 bar)

Compliance with the following codes:  IPC, IRC, UPC and NPC for use in accordance with the U.S. and Canadian plumbing codes

Compliance with the following standards:  
     ASSE 1003
     CSA B356
     NSF/ANSI 61, Drinking Water System Components - Health Effects
     Reduction of Lead in Drinking Water Act, California Health and
                  Safety Code 116875
      S.3874, Reduction of Lead in Drinking Water Act
      UL 2043, Plenum Rating   

Technical Brochure

Instruction Sheet