Is PEX OK for hydronic heating?

Can I use PEX pipe for radiant or hydronic heat applications? Yes, PEX pipe is approved for radiant or hydronic heating applications. Since ferrous components are likely to be present in the system, it is important to use oxygen barrier PEX pipe to help prevent ferrous components from rusting.

What kind of pipe is used for hydronic heating?

Hydronic piping traditionally consists of carbon steel or black iron pipes, along with copper and other metals. For example, installations that have large amounts of piping or higher flow rates are often served with carbon steel.

Can you install hydronic heating yourself?

to have the benefits of RADIANT HEAT at a REASONABLE COST. This is something that you can DO YOURSELF (DIY), with YOUR OWN TOOLS and WITH YOUR OWN LABOR. You may find that the installation of radiant heat is one of the best home improvement projects that you have ever done.

Can you use galvanized pipe for hydronic heating?

It can be used for hydronic heat systems using recirculated water. Galvanized steel pipe is coated to resist corrosion and was generally used for domestic hot and cold water piping. Copper and black pipe can and do co-exist in hydronic heating systems.

What should PEX not be installed in?

You can’t install PEX in high heat areas like near recessed lighting. This also means you can’t connect PEX directly to a hot water heater, but you can use a connecting material to do this.

What are the types of piping system in hydronic system?


Hydronic heating and cooling systems are classified as being either”open” or “closed”, and sub-classified as to the return piping arrangement; direct, reverse, or a combination of the two methods. Additionally, distribution piping systems may be one-pipe, two-pipe or four-pipe.

Can you use PEX for boiler system?

The Pex material is made to be strong, yet pliable, making it ideal for pipes that need to bend around and throughout a house. Since the boiler needs to heat the water to a temperature of 180 degrees, it is not suitable for use in the kitchen or bathrooms. Flexible Pex tubing attaches easily to a boiler.

What is a hydronic loop?

A building’s hydronic HVAC system is rarely just the sum of its parts. The system is comprised of chillers, boilers, pumps, VFDs, AHUs, and valves that create a loop through which water is circulated to control the building’s temperature and its occupants’ comfort.

How long does hydronic piping last?

Hydronic systems are accredited with having a relatively comfortable lifespan of 15 to 20 years. In the case of underfloor heating or radiant heating, the system lasts many years longer than most other hydronic and even HVAC systems.

Can I use black iron pipe for water?

Water Pipes

Black iron pipes are resistant to water damage, making them a popular choice for water pipe lines. Black iron pipes are less widely used than they were a few decades ago, as they have now been replaced by regular steel pipes which are less prone to leaking and are more durable.

What is a PEX water line?

PEX, short for cross-linked polyethylene, is a flexible plastic used for plumbing. The tubing has become quite popular over the years, replacing traditional copper and galvanized steel water supply lines.

What is Al PEX?

Definition. PEX-AL-PEX piping is a coextruded crosslinked polyethylene composite pressure pipe with a welded aluminum tube reinforcement between the inner and outer layers. The inner and outer crosslinked polyethylene layers are bonded to the aluminum tube by a melt adhesive.

Why do you need oxygen barrier PEX?

Oxygen Barrier PEX overview

External coating of oxygen barrier PEX tubing effectively prevents diffusion of oxygen molecules into the water through walls of the pipe. This feature prevents corrosion of cast iron components in the system (circulator pumps, air purgers, fill valves, boiler heating elements, etc.)

Can I crimp PEX-AL-PEX?

The al-pex is a different size than straight pex. Crimp fittings and tools are available for pex al pex. However the sizing is different than for pex. You cannot use pex crimping tools or fittings on pex al pex.

What is the difference between PEX and PEX-AL-PEX?

Where traditional PEX is flexible, there is nothing that keeps it in place unless you tie it down every few feet. With PEX-AL-PEX, once you bend it, it will hold that shape until you bend it again. PEX-AL-PEX also has less expansion than standard PEX with the layer of aluminum assuring that it keeps its shape.

Which PEX tubing for radiant heat?

The most common type of tubing used for radiant heat applications is the oxygen barrier PEX. The oxygen diffusion barrier coating of this radiant heat PEX prevents the oxygen in the atmosphere from permeating the pipe walls into the water to avoid over-saturation of the water with oxygen.

What PEX should I use for radiant heat?

1/2 Inch PEX Tubing

The most common sizes of PEX Pipe for Radiant Heat Systems is 3/8 Inch, 1/2 Inch, 5/8 Inch and 3/4 Inch. Generally, for residential Radiant Heat Systems we recommend 1/2 Inch PEX Tubing. The PEX Tube size dictates the flow rate that can be achieved and thus the maximum loop length of the pex tube.

How do I know if I have PEX A vs PEX B?

Again, the main distinction lies in the manufacturing method, which is what assigns an A, B or C to PEX. PEX A is made using the Peroxide, or Engel, method. PEX B is formed using Silane, or Moisture Cure, method. This is the most common PEX pipe type out there.

How long does PEX pipe last?

Additionally, long-term testing programs on PEX have shown that it has a potential lifespan of more than 100 years. So, while copper systems may have to be re-piped every few years or decades due to corrosion and pinhole leaks, a PEX system can last 10 times longer — or more.

Is PEX safe for drinking water?

There are no health risks associated with drinking water from PEX pipes. A few types of PEX-pipe may cause prolonged undesirable taste and odour if the water remains in pipes over time.