How To Clean And Flush Your Navien NCB-240 Combi - Boiler
MrV2u
1,061 lượt xem 4 months ago In this video I show you the correct way to clean to clean and flush your Navien. The only tools needed are: toothbrush, 2 washing machine hoses, 5 gallon bucket, 2 gallons of vinegar, screwdriver and adjustable pliers.