Pressure regulator CALEFFI 3/4" 16 bar with pressure gauge (model 533251)

CALEFFI 3/4" pressure regulator model 533251 limits incoming water pressure to a stable downstream value and includes an integrated pressure gauge for visual monitoring. Designed for residential and light commercial plumbing and heating systems, the compact valve reduces pressure spikes, protects fixtures and appliances, and helps maintain consistent system performance. The body and internal components are engineered for standard water supply conditions and routine installation on 3/4" pipe connections.

Advantages

The regulator provides accurate pressure reduction up to a maximum inlet pressure of 16 bar and allows quick visual verification via the built-in pressure gauge. Its 3/4" connection size fits common domestic and small commercial piping, and the valve design reduces downstream pressure fluctuations that can cause wear and leaks. The compact, serviceable construction simplifies installation and routine checks without requiring additional external gauges.

Suitable for

• Domestic water supply pressure reduction for houses and apartments
• Light commercial installations such as small offices, shops and clinics
• Protection of sanitary fittings, boilers and water-using appliances against overpressure
• Plumbing systems where visual pressure monitoring is required

Key specifications

• Connection size: 3/4" suitable for standard threaded pipe fittings
• Maximum inlet pressure capability: designed for use up to 16 bar
• Integrated pressure gauge for direct visual monitoring of downstream pressure
• Application: cold and hot water distribution systems and heating installations
• Construction: compact valve body with serviceable components for maintenance

How to use

Install the regulator in the main incoming water line or a branch line using the appropriate 3/4" threaded connection, observing flow direction indicated on the body. Adjustments to the downstream pressure are made following the manufacturer's installation guidance; after initial setup, confirm the set pressure using the built-in gauge. Perform routine visual checks of the gauge and inspect the valve for leaks or damage during normal maintenance intervals. For system isolation or servicing, close upstream and downstream shut-off valves before removing or servicing the regulator.

Usage recommendations

Install the regulator where it is accessible for reading the gauge and for maintenance. Ensure upstream water quality and strainers are in place to reduce debris entering the valve. Do not exceed the valve's maximum inlet pressure rating and follow local plumbing codes and manufacturer installation instructions for reliable operation.