English
NOTICE: The National Fuel Gas Code (NFGC) mandates a manual gas shut- off valve: See (NFGC)
for complete instructions. Local codes or plumbing authority requirements may vary from the
instructions or diagrams provided and take precedent over these instructions.
Installing the 20H Outdoor Tankless Water Heater
Typical Installation ( Some Items May Not Apply)
20H Installation
Expansion Tank
(If Needed)
To Hot Water
Faucet (S)
Pressure
Relief Valve
Drain Valve
Discharge Line
(To Suitable Drain)
Check Valve
Or Backflow
Preventer
Manual Gas
Appliance
Shut-Off
(Supplied)