Potable Water Expansion Tank Sizing

10 5 7 requires backflow prevention to prevent.

Potable water expansion tank sizing.

Sizing expansion tanks for water heaters can be a complex engineering challenge but residential expansion tank sizing has been simplified through the use of calculators. Find out more by visiting our website. Potable water expansion tanks thermal expansion occurs when water is heated during non use periods the installation of a pressure reducing valve prv check valve or back flow preventer closes the water system leaving water with no room for expansion. This expansion tank controls thermal expansion of water in open domestic hot water supply systems.

Examples of one way devices include. As a rule of thumb a thermal expansion tank should be about 10 of the total water heater volume. Its pre pressurized steel tank uses an expansion membrane to prevent air water contact for long system life. Water heater tank capacity is 100 gallons.

100 gallons x 10 10 gallon expansion tank. This small volume of water can cause rapid increases in system pressure if a backflow preventer or other one way device is installed without the proper thermal expansion tank. Sizing the therm x trol potable water expansion tank as water is heated thermal expansion takes place. New or larger expansion tanks may be needed due to pressure reducing valves check valves and backflow preventers added to the community s water system.

National standard plumbing code. 2 250 gallon water heaters 500 gallons total. Expansion compression and diaphragm tanks for proper system pressurization in hydronic heating and potable water plumbing systems. Backflow preventers.

Let s take some examples. 500 gallons x 10 50 gallon expansion tank. Therm x trol expansion tanks are designed to control pressure in commercial closed potable hot water systems. Available in diaphragm partial acceptance bladder and full acceptance bladder designs these tanks range in size from 2 gallons 7 6 liters to 528 gallons 2 000 liters.

The potable water expansion tank shall be installed in the cold water service pipe line on the supply side of the water heater or water storage tank. Our sizing guide for potable water expansion tanks helps you find the right watts regulator or data potable tank. It absorbs the increased volume of water generated by the hot water heating source.