Bradford White EVERHOT TG-150E-N(X Installation And Operation Instruction Manual page 49

5 gallon pail of virgin, food
grade, white vinegar (or virgin,
food grade, citric acid).
Figure 20. Piping for Mineral Scale Flushing.
V1
H3
V3
Hot Water Line
H2
Circulating Pump
49
Eve r Hot® Rinnai
Water Heater
I n-line
Filter
Gas Supply
V2
V4
Cold Water Line
H1