For Water Heater Expansion Tanks in KC

Web Design for Water Heater Expansion Tank Companies in Kansas City

Water heater expansion tank customers are KC homeowners who are replacing a water heater and were told by the plumber or city inspector that an expansion tank is required by the current plumbing code — the 2018 and 2021 International Plumbing Code require a thermal expansion tank on any water heater installed in a closed plumbing system; homeowners whose pressure relief valve on the existing water heater is dripping or discharging periodically — the relief valve drip pattern that occurs when the system reaches its set pressure because there is no expansion tank to absorb the volume increase from water heating; or homeowners who had a new pressure reducing valve installed and whose plumber or inspector noted that the PRV creates a closed system that requires an expansion tank. The central education is thermal expansion as the pressure source that requires management, the closed system as the condition that makes thermal expansion dangerous to the relief valve and water heater tank, and expansion tank sizing for the KC water heater BTU output and system pressure — three things that determine whether a homeowner understands why the expansion tank is a safety device and not an optional add-on. Thermal expansion mechanism: water at forty-five degrees Fahrenheit expands approximately two percent when heated to one hundred twenty degrees — the typical residential hot water storage temperature; a forty-gallon water heater gains approximately zero point eight gallons of volume when heated from cold fill temperature to storage temperature; in an open plumbing system — one where the water supply connects directly to the street main without a check valve or pressure reducing valve — the expanded volume pushes back into the street main and is absorbed by the municipal system; in a closed system — one with a PRV, backflow preventer, or check valve on the supply line — the expanded volume has nowhere to go and the system pressure rises until the temperature-pressure relief valve opens or the water heater tank wall experiences repeated pressure cycling that shortens its service life. Closed system condition: nearly all KC homes built after approximately 2000 have a pressure reducing valve on the water supply line — KC Water main pressure commonly reaches eighty to one hundred PSI, and the PRV reduces this to sixty to eighty PSI at the house; the PRV functions as a one-way valve that creates a closed system; many older KC homes have had PRVs added during kitchen or bathroom remodels; any backflow prevention device on the service line also creates a closed condition; if a homeowner is unsure whether their system is closed, they can watch the pressure gauge on the water heater while the heater cycles — if pressure rises during heating, the system is closed. Expansion tank sizing: a thermal expansion tank for a standard residential water heater must be sized for the water heater volume, the cold water supply pressure, and the system working pressure; most KC residential water heaters use a two-gallon expansion tank for forty to fifty gallon water heaters at sixty PSI working pressure; the tank must be pre-charged to match the cold water supply pressure — if the supply pressure is sixty PSI, the expansion tank bladder pre-charge must be set to sixty PSI before installation; an incorrectly pre-charged expansion tank will not absorb the thermal expansion volume correctly and the relief valve drip pattern will continue. A water heater expansion tank website that explains thermal expansion volume increase in a closed system, the closed system condition from KC PRV installation, and expansion tank sizing and pre-charge requirements earns the homeowner who wants to understand why the expansion tank is required and whether the dripping relief valve is already signaling the problem.