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The DuraVent 4PPS-R3L is a 4 to 3 PolyPro reducer designed to transition your vent system to a smaller diameter efficiently. This PolyPro reducer is built for use with category II and IV condensing appliances including tankless and high-efficiency water heaters, condensing boilers, and warm air furnaces.
This reducer is ideal for setups requiring a reliable vent transition while maintaining safe operating clearances.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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