KD Navien® 20018744B Back-Up Ring

PN :
539944
UPC :
884954358758
MPN :
20018744B
KD Navien® 20018744B Back-Up Ring, 18.5 in ID x 21.6 in OD Dia, For Use With: NPE Series Condensing Gas Tankless Water Heater

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KD Navien® 20018744B Back-Up Ring, 18.5 in ID x 21.6 in OD Dia, For Use With: NPE Series Condensing Gas Tankless Water Heater, CR/CC Series Condensing Water Heater, NCB/NCB-ASME/CH/CH-ASME Series Condensing Gas Combination Boiler, NR/NP Series Condensing Tankless Gas Water Heater, Polyamide 6.6, Import