Viessmann 7819971 Air Vent with Shut-Off Base 3/8" for Vitodens Boilers

The Viessmann 7819971 is a replacement 3/8" air vent with shut-off base designed for select Vitodens 100-W and 200-W Series residential wall-mounted gas-fired condensing boilers. This essential component automatically purges unwanted air from the boiler's heat exchanger and hydronic system, allowing for optimal efficiency and preventing air locks that can impair heating performance.

Key Features:

• G3/8" (3/8 inch) threaded connection for secure installation
• Integrated shut-off base allows for easy servicing and replacement without draining the system
• Automatic float mechanism vents trapped air during system operation
• Manual cap can be tightened to seal the vent when needed
• Genuine Viessmann OEM replacement part ensures proper fit and function

Compatible Vitodens Boiler Series:

• Vitodens WB1A, WB1B, WB1Bc series (100-W models)
• Vitodens WB2A, WB2B series (200-W models)
• Vitodens B2HA, B2HB series

The Vitodens 100-W and 200-W boilers are designed to operate with natural gas and liquid propane gas (LPG), with the Vitodens 100-W WB1A designed for operating with natural gas only. When ordering replacement parts, check with the manufacturer and provide the 16-digit boiler serial number or the 12-digit ASME/NB serial number to ensure a proper fit before purchasing.