Potable Water Expansion Tank Sizing

2 250 gallon water heaters 500 gallons total.

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. Its pre pressurized steel tank uses an expansion membrane to prevent air water contact for long system life. 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. 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.

As a rule of thumb a thermal expansion tank should be about 10 of the total water heater volume. Therm x trol expansion tanks are designed to control pressure in commercial closed potable hot water systems. 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. Expansion compression and diaphragm tanks for proper system pressurization in hydronic heating and potable water plumbing systems.

Sizing the therm x trol potable water expansion tank as water is heated thermal expansion takes place. 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. 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.

Let s take some examples. 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. Examples of one way devices include. Customer support find a watts distributor.

Water heater tank capacity is 100 gallons. National standard plumbing code. Customer support customer support. 500 gallons x 10 50 gallon expansion tank.

Backflow preventers. This expansion tank controls thermal expansion of water in open domestic hot water supply systems. Find out more by visiting our website.