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On a natural vent water heater is there any minimum requirement on how high up the elbow in the vent must be from the vent hood? For example if height is tight can the elbow be an inch above the vent hood?
I understand the vent must pitch up towards the chimney but cannot find any spec on height before a 90 deg bend.
Sorry if this is a dumb question but I feel its better safe then sorry.
Single pipe quasi-vapor system. Typical operating pressure 0.14 - 0.43 oz. EcoSteam ES-20 Advanced Control for Residential Steam boilers. Rectorseal Steamaster water treatment