How to install pex plumbing

PEX plumbing system has been used for more years and therefore its failures has been observed and known. Its major failures is linked to piping and fitting. Piping fails when the pipes are exposed to chlorine that is within the water, exposure to direct sunlight before its installation.

PEX fittings are faster to install than copper.

If you use a manifold and ‘home-run’ system, it’s like running a garden hose to each fixture — super fast and easy. But even if you install PEX fittings in a conventional main line and branch system, the connections are quicker to make than soldering copper.

All this makes PEX an excellent piping material for hot and cold water systems, especially since it is flexible and well adapted for temperatures below freezing all the way up to 200 degrees Fahrenheit. PEX is easy for plumbers to install and has fewer joints, bringing your costs down.

Disadvantages of PEX Piping

While PEX has numerous benefits, it should not be used outdoors. PEX is vulnerable to UV rays, which leads to premature degradation and it will not withstand outdoor conditions of extreme cold. PEX is engineered only for indoor use. PEX can’t be recycled.

Unfortunately for Californians, Pex is currently banned by the state. Despite frequent requests for approval, Pex continues to be denied and cannot get added to the list of approved materials when it comes to residential construction projects.

PEX was banned in California due to some concerns about toxic materials leaking through the pipe and into water. Through various national laboratory tests, PEX has proven to be completely safe and durable. It is now legal in California and even included in principal plumbing codes.

PEX-A is the most flexible of all PEX tubing types, has little or no coil memory and gives installer an ability to repair kinks with a heat gun. 8 times the OD for PEX–B & C) is helpful, but offers little practical advantage in most cases. PEX–B is a clear winner in terms of price vs. both other types.

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.

PEX pipe is approved for residential and commercial hot and cold water distribution systems, municipal water service lines, radiant panel heating systems, hydronic baseboard heating systems, snow and ice melting systems and building services pipe.

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.

Yes, insulation is an essential part of installing PEX piping, as the lack thereof could lead to unfortunate outcomes. PEX piping is more resilient against fluctuations in temperatures than other commonly used materials. It is flexible and does not act as a conductor for heat and cold as easily as metal materials do.

I have had no problem with spray foam on PEX. Stability of the PEX pipe should not be jeopardized providing the GREAT STUFF™ and GREAT STUFF PRO™ sealants are applied as per manufacturer’s instructions around the pipe. Adhesion, however, is questionable between any polyurethane spray foam and PEX surfaces.

The best way to eliminate sweating water pipes is to stop the warm, moist air from reaching them. This entails wrapping the exposed pipes — or any sweating pipes — with foam pipe insulation.

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.

PEX itself won’t be damaged if it gets frozen, but any fittings could be. Fiberglass insulation acts like a decent air filter, but loses its ability to insulate well if there’s a breeze. PEX shouldn’t be exposed to UV, so if there’s vents that let some light in, insulation may be required for that long-term.

We can prevent condensation from occurring by insulating the pipe with enough insulation to keep the air around the pipe from dropping below the dew point. It depends on the dew point of the air, which fluctuates according to the ambient temperature and the relative humidity.

When preventing freezing is the goal, insulate both the hot- and cold-water pipes. If the goal of pipe insulation is to eliminate pipe sweating and humidity, then it is the cold water pipes that are in most need of insulation. When exposed cold pipes contact warm, humid air, condensation can form on the pipes.

The Best Way to Stop Sweating Pipes

Removable reusable insulation blankets, like Thermaxx Cold Insulation Jackets, are designed to fit snugly and keep the ambient air temperature and humidity from affecting your pipe.