5.3103.7 Installation of Pressure Gauges

Hydronic Heating (Hot Water and Steam)
Piping (Distribution Installation)
Desired Outcome: 
Accurate verification of system operating conditions
For supporting material, see Referenced Standards.
Check for presence of asbestos-containing materials (ACMs)

Potential ACMs will be handled in accordance with SWS 2.0110.2 Potential Asbestos-Containing Materials

Ensure a safe work environment

Location of pressure gauges

Available plans will be reviewed to assess system design and intent

Pressure gauge locations and conditions will be visually verified; pressure gauges should be located on the inlet and outlet of all flow dependent devices (e.g., boilers, pumps, strainers, heat exchangers, coils, control valves)

Determine minimum pressure gauge placement

Select appropriate pressure gauges

Pressure gauge range will be selected to ensure accurate readings over system operating range

For high-rise applications where pressure differential is a small percentage of gauge pressure range, differential pressure gauges will be used

Ensure selected pressure gauge provides accurate pressure measurement

Install pressure gauge

Nearest valves on either side of pressure gauge location will be closed

Pressure gauge will be installed in accordance with manufacturer specifications

Measurement accuracy of differential pressure applications (e.g., pumps, strainers, heat exchangers, valves) will be improved when a single-pressure gauge is connected to both inlet and outlet of device with appropriate valving

System will be refilled and air will be eliminated

Properly install pressure gauge

Reinsulate area

Where insulation was removed, gauge tapping and associated piping will be reinsulated with new insulation to IECC IECC International Energy Conservation Code and ASHRAE ASHRAE American Society of Heating, Refrigerating and Air-Conditioning Engineers, www.ashrae.org 90.1, at a minimum

Reduce energy loss

Maintain safe surface temperature


Completed work will be reviewed with the building/property management team and operations staff

Building/property management team and operations staff will be educated on the safe and efficient operation and maintenance requirements of the installed item

Ensure building/property management team and operations staff is informed of the safe, efficient operation and maintenance requirements of the installed item