Many Joint Management Bodies (JMBs), Management Corporations (MCs) and property managers oversee high-rise buildings with Pressure Reducing Valves (PRVs). But an important question is often overlooked:

Do you know whether your building's PRV pressure is set correctly?

A PRV controls downstream water pressure to help maintain suitable operating conditions within a building's water supply system. However, an unsuitable pressure setting, deteriorated valve components or inconsistent operating conditions may affect water supply performance.

1. Why Is Correct PRV Pressure Setting Important?

In a high-rise building, water pressure requirements vary according to building height, pressure zones, pipework design and equipment limitations.

An unsuitable PRV setting may contribute to:

• Excessively high downstream water pressure.

• Insufficient water pressure at upper floors.

• Fluctuating water pressure between floors.

• Increased stress on pipes, valves and plumbing fixtures.

• Leakage or premature deterioration of plumbing components.

The correct PRV pressure should be determined according to the building's hydraulic design, operating requirements and equipment ratings. There is no single pressure setting suitable for every building.

2. Common Signs of PRV Problems

Property managers should pay attention to these warning signs:

• Water pressure is consistently too high or too low.

• Water pressure fluctuates during normal operation.

• Unusual noise or vibration around the PRV.

• Water leakage around the valve or its connections.

• Pressure readings differ significantly from expected operating conditions.

These symptoms do not automatically confirm PRV failure. Further inspection is required to identify the actual cause.

3. What About Non Modulating Valves?

Non Modulating Valves are commonly used in water tank level control applications.

Their function is to control incoming water supply according to the tank's water level and valve operating mechanism.

When a valve fails to close properly, the water supply may continue even when the tank reaches its intended water level.

Possible warning signs include:

• Water tank overflowing.

• Continuous incoming water flow.

• Unstable water level.

• Valve failing to operate or close correctly.

Regular inspection and servicing can help identify worn components, operating issues and potential valve failures before they develop into more serious problems.

4. Why Is Regular Valve Maintenance Important?

PRVs and Non Modulating Valves are important components of a building's water supply system.

Regular inspection and appropriate servicing can help:

• Maintain reliable water level control.

• Maintain suitable water pressure.

• Identify wear and tear at an early stage.

• Reduce the risk of unexpected valve failure.

• Reduce potential water overflow and leakage problems.

Maintenance intervals should be determined according to valve type, operating conditions, manufacturer recommendations and previous maintenance findings.

5. What Should Be Checked During a PRV Inspection?

A proper PRV inspection should consider:

• Inlet and outlet pressure readings.

• Pressure gauge condition and accuracy.

• Visible leakage around the valve body and connections.

• Valve operating condition.

• Pressure stability under relevant operating conditions.

• Valve installation arrangement and accessible components.

For Non Modulating Valves, the inspection should also consider water level control operation, valve closing performance, pilot components where fitted and visible signs of leakage or deterioration.

Any pressure adjustment should only be carried out after reviewing the building's pressure requirements and system conditions.

6. A TECH Free On-Site Valve Inspection

A TECH Construction Sdn Bhd provides professional plumbing inspection and servicing for existing high-rise buildings.

We invite JMBs, MCs, property managers and facility managers to arrange a FREE initial on-site inspection of their building's PRVs and Non Modulating Valves.

Our team can help to:

• Inspect accessible valve components.

• Observe valve operating conditions.

• Review available pressure readings.

• Identify visible defects or potential concerns.

• Provide preliminary professional recommendations.

The free inspection is intended for initial assessment. Calibration, pressure adjustment, servicing, repairs, replacement and additional testing are separate works subject to quotation.

Not sure whether your building's PRV pressure is set correctly?

Contact A TECH Construction Sdn Bhd to arrange your free initial on-site valve inspection.

WhatsApp: 016-699 0481

Serving Kuala Lumpur, Selangor and the Klang Valley.

A TECH Construction Sdn Bhd
Specialist Plumbing Engineering for Existing & High-Rise Buildings