Question: When Do You Need An Expansion Tank On A Water Heater?

How do I know if I need an expansion tank on my water heater?

When is it required? An expansion tank is always highly recommended if you have a ‘closed-loop system’ caused by any kind of check valve or pressure regulating valve installed on your house’s water supply line. A common illustration compares having high water pressure in your home to having high blood pressure.

Is an expansion tank required for a water heater?

While expansion tanks are required by code in most closed-loop water heater systems, they have a reputation for failing. Common expansion tank issues include: Rubber Diaphragm Wear Out.

Can you install water heater without expansion tank?

Water expands as it heats up, and without an expansion tank attached to the water heater, a closed plumbing system can experience damage from this thermal expansion.

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Is an expansion tank required by code?

The California Plumbing Code (Section 608.3) and the California Mechanical Code (Section 1005.0) requires a thermal expansion tank, or listed equivalent, to be installed to water heating systems to relieve excessive building pressure during the heating process.

How much does it cost to install an expansion tank on a water heater?

The cost to install a thermal expansion tank can range from $300 to $400. Often the expense of the thermal expansion tank is included in the cost of the new water heater.

Where should an expansion tank be located?

The expansion tank (potable water type) should be installed on the inlet cold-water line. It can be installed anywhere in the building on the cold-water supply (after the regulator). It is usually installed by plumbers on the cold-water inlet of the water heater.

Why put an expansion tank on a water heater?

The expansion tank is designed to handle the thermal expansion of water as it heats up in the water heater, preventing excessive water pressure. If water pressure gets to high it can damage valves in plumbing fixtures, joints in supply pipes and the water heater itself.

What happens when an expansion tank fails?

Oftenthe diaphragm dividing the two systems will fail, causing the two systems to become one. When this happens, the expansion tank turns into a “dead leg” that will eventually cause damage and premature failure to your water heater.

Does the expansion tank go on the hot or cold side?

Although expansion tanks can be installed on the hot side, we strongly recommend they be installed on the cold line, downstream of the shutoff valve.

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Can you install expansion tank upside down?

Expansion tanks can be installed in any direction. Whether oriented uprightly, horizontally, or even upside down, the expansion tank will function properly without any adverse effects. Without proper support, the expansion tank could break off its mounting pipe — especially if the tank fails and fills with water.

What PSI should my expansion tank be?

The recommended water pressure is between 50 and 60 PSI. Thermal Expansion Tanks contain an air bladder which is pressurized with air, and expands and contracts to absorb the expanded water from the water heater. needed.

Is an expansion tank required for a water heater in Florida?

Water heaters installed in compliance with the current plumbing code will have the required T & P Valve and thermal expansion tank. For public health protection, the water purveyor may require the installation of a check valve or backflow preventer downstream of the water meter.

Can a water heater be installed directly on the floor?

Gas water heaters can sit directly on the floor if they are FVIR (flammable vapor ignition-resistant). All gas 30, 40, and 50-gallon water heaters sold to the North American market after 2005 must comply with ANSI Z21. 10.1a-2002 standards and are FVIR. All electric water heaters can be placed directly on the floor.

Can I install my own water heater in Texas?

A Water Heater Installation Requires A Plumbing Permit In Texas. Since 2007, Texas Requires A Plumbing Permit For A Water Heater Replacement. The permit requires a licensed plumber install the water heater in compliance with the State of Texas + any Local Municipality Plumbing Codes.

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