Can a thermal expansion tank be installed horizontally?

Asked By: Lucius Argacha | Last Updated: 21st January, 2020
Category: home and garden indoor environmental quality
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In general, the tank can be installed vertically above or below the plumbing, or horizontally. Typically, the tank is only required to be supported when installed in the horizontal position. Most smaller tanks are designed to be supported by the plumbing, when installed in the vertical orientation.

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Considering this, can you install an expansion tank sideways?

Expansion tanks can be installed horizontally. Expansion tanks can be installed horizontally. The recommendation that they are installed vertically is to reduce stress on the (normally copper) pipe, which should be adequately supported even if the tank is suspended vertically.

Also, where should the expansion tank be installed? Your expansion tank can be anywhere on your plumbing system and does not need to be installed in close proximity to the water heater. It is most commonly installed using a “T” at the cold inlet to the water heater. But, functionally, it can be installed anywhere on the cold inlet line.

In respect to this, can I mount my pressure tank horizontally?

Answer; Yes it is a factor, the tanks are designed to sit air stem up or air stem down. Sitting a vertical tank horizontally puts more pressure on the lower parts of the bladder and can cause early failure. If it is full of water at the air stem, then you did rupture the bladder.

Can a thermal expansion tank be installed upside down?

if you install it upside down, then air goes up into the tank, and cann't get out -reducing the functionality of the tank. vertical, opening up is best.

31 Related Question Answers Found

Is an expansion tank necessary?

Although many jurisdictions now require an expansion tank to be installed at the same time that a water heater is installed, an expansion tank has not always been required in the past and may still not be required in some regions.

How much does it cost to install an expansion tank?

Water heater expansion tank prices start at around $40 and range up to nearly $200; pricing is largely dependent on the size of the tank. For most residential installations with 40- or 50-gallon water heaters, a simple 2-gallon tank is fine. The tank is quite easy to install with a normal 3/4-inch threaded connection.

Can a pressure tank be used as an expansion tank?

An expansion tank usually has a much smaller inlet hole than a pressure tank. But if it has a full open 3/4" port it can work as either an expansion or a pressure tank. The one with the small port will only work as an expansion tank.

Does an expansion vessel have to be upright?

2 Answers. In general, the tank can be installed vertically above or below the plumbing, or horizontally. Typically, the tank is only required to be supported when installed in the horizontal position. Most smaller tanks are designed to be supported by the plumbing, when installed in the vertical orientation.

Do you need an expansion tank with a pressure reducing valve?


If you have excess pressure over 80 P.S.I. supplied to your home by the city water supply, an expansion tank does nothing to correct this. That's the job of the pressure reducing valve (PRV). It protects against the constant fluctuation of high pressure caused by thermal expansion upon a closed-loop system.

Can a submersible pump be installed horizontally?

The water inlet is between pump and motor with the outlet from the final pump stage leaving axially. Submersible pumps need not be installed truly vertically, which may be a big advantage in very deep wells. They are even sometimes used horizontally as booster pumps in distribution mains (Plate 32(d)).

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. Check the air pressure in the Expansion Tank using a tire gauge.

Why do I need an expansion tank?

Your expansion tank can help you to save your system. The expansion tank serves as a backup system to prevent overworking your plumbing. The excess water volume, instead of causing too much pressure on the plumbing, rushes into the expansion tank and lowers the pressure in the water heater to safer levels.

Does Home Depot sell expansion tanks?


Water Heater Expansion Tanks - Water Heater Parts - The Home Depot.

Why install an expansion tank on a water heater?

That is an expansion tank installed on the water supply pipe to the water heater. Its purpose is to deal with thermal expansion of water as it heats up in the water heater - to prevent water pressure from getting too high. Like most substances, water expands as it is heated.

What causes expansion tanks to fail?

The loss of air cushion in the expansion / compression tank means that at each heating-on cycle the system pressure can be too high, causing the temperature/pressure relief valve to spill. Air in the hot water heating system can cause loss of heat: air in baseboards radiators keeps hot water out - they don't get hot.

Do I need to install 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 analogy compares having high water pressure in your home to having high blood pressure.

How does an expansion tank work?

Expansion tanks work by equalizing pressure throughout the system. An expansion tank is a small tank divided in two sections by a rubber diaphragm. As hot water enters the heating system, the pressure in the system increases. As pressure increases, the diaphragm in the expansion tank is pushed down.

How do you install a thermal expansion tank?


It is recommended to install the thermal expansion tank on the cold water line, horizontally and close to the water heater. Use the threaded T- fitting, Teflon tape, and pipe wrench to make the watertight connection. Remove the trapped air by opening the hot water tap.

Can expansion vessels be fitted upside down?

Re: Expansion Vessel - Which way is up? There's no need to replumb if the vessel is upside down since the air side has a bladder or diaphragm in it which separates the dry from the wet side.

Can a PRV be installed upside down?

Can the Caleffi PRV be mounted upside down? We advise no; keep the body above the horizon when mounted in a horizontal pipe, or mount it in a vertical pipe.