1. Equipment removal 

• Remove old water heater and associated components 

(Note: work shall be completed by a licenced plumbing professional where required.) 

• Permanently remove equipment from job site and recycle or dispose of removed equipment.

2. New equipment installation 

• New water heater and associated components will be installed to accepted industry standards, ENERGY STAR® certified, equivalent, or better in accordance with the IRC and manufacture specs. 

(Note: work shall be completed by a licenced plumbing professional where required.) 

• Install all applicable components listed in following steps. 

3. Emergency drain pan 

• An emergency drain pan and/or drain line shall be installed in accordance with the IRC 

4. Expansion tank  

• Expansion tanks will be installed where required and in accordance with the AHJ (authority having jurisdiction) 

5. Temperature and pressure relief valve 

• Correct temperature and pressure relief valve will be installed in compliance with IRC and according to manufacturer specifications 

• Temperature and pressure relief valve discharge tube will be installed in accordance with IRC 

6. Dielectric unions 

• Dielectric unions will be installed in accordance with the IRC, authority having jurisdiction, and according to manufacturer specifications 

7. Fuel supply 

• Electric or fossil fuel supply components will be installed to accepted industry standards as per NFPA 31 and 54, or NFPA 70 National Electric Code ( NEC ) for electric components, or authority having jurisdiction. 

• Ensure gas connections are to current code. This may require a new gas valve, flex connector, or drip legs.

8. Discharge temperature 

• Discharge temperature will be set not to exceed 120° or as prescribed by local code 

9. Commissioning of system 

The following will be checked once the system has been filled and purged:

• Safety controls

• Combustion safety and efficiency

• Operational controls

• Fuel and water leaks

• Local code requirements

Commissioning will be in compliance with manufacturer specifications and relevant industry standards 

10. Worst Case Draft Test 

• Conduct a Worst Case draft test to verify Category I, II, and III appliances are venting safely before leaving home for the day.

• Testing shall be recorded using the WAP Worst Case Draft Test form. 

11. Combustion testing 

• Conduct a combustion test on the new water heater 

12. Occupant education 

• Occupants will be educated on the safe and efficient operation and maintenance of the system