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This is a specific little part for servicing Worcester Bosch Integrity series boilers – it's the 'Duck Plug'. HVAC and boiler technicians will know exactly what this is for: it's a 6mm plug used for taking flue gas samples with analyzers like those from Testo or Kane (TPI models). When you need to check the boiler's combustion efficiency and safety, you use this port. The plug itself, MPN 'DUCK', is brand new in its packaging. If you're a gas engineer or technician working on these boilers, having the correct genuine Worcester part ensures a proper seal and safe operation after testing. It's a small but crucial component for maintenance and safety checks. Keep a few on hand in your service van so you're always prepared.
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