Potable Water Expansion Tank Sizing

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.

Potable water expansion tank sizing.

Backflow preventers. 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. This expansion tank controls thermal expansion of water in open domestic hot water supply systems. Let s take some examples.

Expansion compression and diaphragm tanks for proper system pressurization in hydronic heating and potable water plumbing systems. 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. 500 gallons x 10 50 gallon expansion tank. 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. Customer support customer support. 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. 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.

It absorbs the increased volume of water generated by the hot water heating source. 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. Therm x trol expansion tanks are designed to control pressure in commercial closed potable hot water systems. Sizing the therm x trol potable water expansion tank as water is heated thermal expansion takes place.

National standard plumbing code. As a rule of thumb a thermal expansion tank should be about 10 of the total water heater volume. 100 gallons x 10 10 gallon expansion tank. Examples of one way devices include.

10 5 7 requires backflow prevention to prevent. Find out more by visiting our website. 2 250 gallon water heaters 500 gallons total.