Receiving Helpdesk

can you use pex for hot water radiators

by Levi Schmeler I Published 3 years ago Updated 2 years ago

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. One may also ask, how do you vent a hot water radiator?

A: Oxygen barrier type PEX pipe has an external polymer coating called EVOH or “oxygen diffusion barrier” and it's the type used for all standard closed loop heating applications, including floor heating, baseboard/radiator heating and snow melting.

Full Answer

Can you use PEX for hot water radiators?

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. Furthermore, how do you vent a hot water radiator?

Does PEX pipe need insulated?

The protection needed to prevent PEX pipes freezing is the same as for all other piping materials. If that's not possible, then the pipe needs to be insulated — and in some cases wrapped with heat tape and then insulated.

How to install PEX pipe and fittings?

Installing PEX Tubing

  • Plan: Figure out what type of project it is, how much pipe, how many fitting you need, and anything else you may require. ...
  • Collect all materials: It helps to draw out a diagram of how the pipe will run and where fittings will be necessary. ...
  • Run the PEX tubing: PEX needs to be supported a minimum of every 32 inches when running horizontally. ...

More items...

How to replace polybutylene piping with PEX?

  • Locating pipes in the wall
  • Cutting as few access holes as necessary
  • Shut off the water to the house
  • Remove the polybutylene from the house
  • Replace with PEX or copper piping

What kind of pipe is used for hot water radiators?

Galvanized steel. Galvanized steel is one of the standard materials used for house plumbing systems and is almost as popular as copper. It works exceptionally for heaters, yet it is more prone to rusting in the long term. For heaters, galvanized steel may work very well.

What temperature can PEX pipe withstand?

But be aware that the general rule of thumb is that pex tubing can withstand temperatures of up to 200 degrees Fahrenheit.

Can you replace radiator pipes with PEX?

Yes, you can replace parts of a hydronic system with pex.

Can PEX tubing be used for hot water baseboard heat?

Product Description. 500ft roll of 3/4" Oxygen Barrier PEX Tubing for use in hydronic (baseboards, radiators), radiant heating and snow melting systems. Certified for use in radiant floor heating applications.

Where is PEX not allowed?

PEX can't be installed in high heat areas. 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.

Can I use blue PEX for hot water?

Color-Coded: Red PEX pipes can be used for hot water supply lines, blue PEX for cold water supply, and white for either hot or cold.

Should I replace copper with PEX?

Coupled with low production and shipping costs, the savings resulting from installing PEX instead of copper pipes can be significant. Better Energy Efficiency – PEX has a lower thermal conductivity rate than copper. As a result, PEX pipes can help keep hot water hotter for longer periods of time.

Is PEX better than copper?

PEX pipe is not only cheaper than copper but more durable too. PEX is immune to corrosion and mineral build-up, and it's not affected by electrolysis, which can cause small pinhole leaks in copper piping. Copper pipes can last anywhere from six months to the life of a building.

How do I run PEX water lines in my house?

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What type of PEX is used for heat?

A: Oxygen barrier type PEX pipe has an external polymer coating called EVOH or “oxygen diffusion barrier” and it's the type used for all standard closed loop heating applications, including floor heating, baseboard/radiator heating and snow melting.

What type of PEX is used for radiant heat?

oxygen barrier PEXThe 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.

Will PEX pipe freeze and burst?

PEX pipes, just like any pipe, can freeze when the temperature drops too low. Because the pipes are designed to be flexible, PEX has the ability to expand. Although it is still possible for them to burst, this means PEX pipes are less likely to rupture after freezing.

How much PEX should I use for a radiator?

In other strings where people have asked about the size of pex needed most answers have seemed to say that 1/2 inch pex should be more than sufficient for most radiators and 3/4 only being needed for very large radiators....i.e radiators larger than ones generally found in homes.

How big of a rad do I need?

If the room doesn't need the full rad output, you won't necessarily need larger than 1/2 inch. All the rads in my house are bigger than yours and only 3 are supplied with 3/4 inch. Unnecessarily as the heat loss calculation for those areas is less than the smaller pipe can carry.

What is PEX A?

Similarly, PEX-a offers resistance to chemical-dissolving agents contained within the hydronic system to prevent the otherwise damaging effects of water. The unique molecular structure is stable, inert and unaffected by chemicals commonly found in most commercial HVAC systems.

What is the PEX-A pipe support?

Perhaps the most critical feature of the PEX-a Pipe Support is its ability to control the natural expansion and contraction that occurs as the piping heats and cools. PEX-a has a free-body expansion rate 10 times that of copper. Installing anchors every 65 feet and using PEX-a Pipe Supports allows PEX-a to function much like a copper system.

Can PEX-A be used in hydronic systems?

For these reasons, PEX-a works perfectly with any terminal unit in a hydronic heating and cooling system.

Which method is used to make PEX?

Many in the industry do not realize there are three different methods for manufacturing PEX — PEX-a, which uses the Engel method; PEX-b, which uses the silane method; and PEX-c, which uses the electron-beam or radiation method. PEX-a is widely considered to be the superior PEX because the Engel method chemically cross-links ...

Is PEX a good copper?

PEX-a also has a long-term advantage over copper when it comes to performance longevity. It is a static system, meaning its internal surfaces — which are three times smoother than copper — will not pit, scale or corrode and its performance will remain the same during year 25 as it was on day one.

Do you need torches for PEX pipe?

Furthermore, no torches, glues or solders are necessary, which makes for a cleaner, healthier job site. Installers can simply confirm with their own eyes that a proper connection is made. This same property allows accidental kinks in the PEX-a pipe to be repaired with a controlled heat source, such as a heat gun.

Is PEX pipe a copper pipe?

Many mechanical contractors and engineers may have a perception of PEX pipe as a cheap and flimsy alternative to copper that is bought at big-box stores for plumbing applications. But PEX is increasingly proving its mettle in various commercial hydronic applications, such as the Dallas Homewood Suites project.

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