5.3103.3 Check Valves (Hot Water)

Hydronic Heating (Hot Water and Steam)
Piping (Distribution Installation)
Desired Outcome: 
Specified water flow provided to system
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

Isolate check valve location

Nearest valves on either side of valve location will be closed

Eliminate water supply to valve location

Install check valves

Check valves will be installed on all pump discharges into common headers

System will be refilled and air will be eliminated

Ensure water flow does not bypass through nonoperating pumps

Reinsulate area

Valve 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