QHT Riva Installation, Operation And Service Instructions - page 12
Manual is about: HEAT ONLY WALL HUNG GAS BOILER
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RIVA HEAT ONLY MANUAL - REV B
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4. Internal Piping & Parts List
Note:
•
Pressure Relief Valve (#19) should be piped to a drain or to the floor as close
as possible to a drain.
•
This diagram is a graphical representation only and is not drawn to scale. Do
not use for piping purposes.