The Viessmann 7529680 Installation Set is a factory‑approved kit designed for use with Viessmann B2HA series condensing boilers (112‑150 MBH and 399‑530 MBH models).
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The Viessmann 7134770 is a 3" CPVC flue adapter designed for condensing boiler venting applications. It enables the transition from poly vent piping to 3" CPVC or PVC vent materials, ensuring a...
