How to Reduce the Water Pressure a Boiler

1. Check the pressure reducing valve (PRV): Inspect the PRV to ensure it functions correctly and is set at the appropriate pressure for your system. If the PRV is faulty or not set properly, replace or adjust it accordingly.

2. Install a water pressure reducing valve: If the PRV is not available or cannot be adjusted, you can install an additional water pressure reducing valve on the cold water supply line to the boiler. Set this secondary PRV to a lower pressure than the boiler's maximum allowed pressure.

3. Check and clean the boiler's pressure release valve: Ensure that the boiler's pressure release valve (PRV) is not blocked or obstructed and that it functions properly. If necessary, clean the valve to allow it to release excess pressure effectively.

4. Adjust the boiler's thermostat: Lowering the thermostat setting on the boiler can help reduce the water temperature and, consequently, the pressure. However, be aware that lowering the thermostat too much may compromise the boiler's efficiency and reduce its ability to provide adequate heat.

5. Examine the expansion tank: If your boiler has an expansion tank, ensure it's correctly sized and pre-charged. A malfunctioning or improperly charged expansion tank can cause pressure fluctuations in the system.

6. Inspect the system's components and fittings: Look for any leaks, cracks, or issues with the pipes, valves, or other components of the boiler system. Repair any leaks or replace faulty parts to prevent unnecessary pressure buildup.

7. Drain and refill the system: Draining the boiler's water and refilling it can help remove air pockets and correct pressure problems. Follow the manufacturer's instructions for properly draining and refilling the boiler system.

Always refer to the boiler's manual and consult a professional if you are uncertain about any of these procedures. Attempting to make adjustments without the proper knowledge or expertise can be hazardous.