PEX Crimp vs. PEX Clamp Fittings

PEX crimp and PEX clamp connections use the same fittings, but the rings and tools used to make these connections are different. It makes sense, then, that installers (especially those new to PEX) often wonder which method is better. Crimping and clamping are equally reliable. If the fitting is made properly, it will not leak. The choice between crimping and clamping should ultimately come down to a matter of preference and the tool that feels most comfortable.



That said, they are a few other factors to take into consideration. Clamp rings are stainless steel, making them more resistant to corrosion than copper crimp rings. This comes into play in direct burial applications, especially in areas with aggressive soil. Clamps also tend to be easier to remove, should the need arise. Crimp fittings, however, can be checked with a go-no-go gauge. The gauge allows the installer to see, immediately after making the fitting, whether or not he/she made the fitting properly. This can be crucial for do-it-yourselfers or those using the tool for the first time. For more information, visit the Resource Center at SupplyHouse.com.

PEX to PB Fittings

Polybutylene piping was common in the United States for a brief period starting in the 1970’s. The grey plastic tubing is still present in some installations from that time. In the event that polybutylene must be connected to PEX, fittings are available in limited sizes. SharkBite U4008LF and U4016LF fittings transition from PB to a traditional SharkBite fitting.

Keep in mind the standard PEX fittings, crimping tools, and rings do not work with polybutylene piping. For a larger selection of PEX fittings for plumbing visit SupplyHouse.com.

Connect PEX to Copper Fittings

As PEX tubing continues to become more commonplace in the plumbing and heating industries, it is often necessary to connect PEX to existing copper tubing. Since PEX and copper have the same outside diameters, SharkBite fittings make the task easy. Crimp/Clamp and ProPEX fittings can be soldered over copper pipes.

Some installations, however, may require a PEX connection directly to a copper fitting. Adapters that make this possible are also available for Crimp/Clamp and ProPEX PEX connections. They, too, must be soldered to the copper, but copper fitting adapters are placed inside the copper fitting, rather than over the copper pipe. On the copper side, fitting adapters have the same outside diameter as a copper pipe.

Keep PEX Out of the Sun

PEX tubing gives users more options in their plumbing and heating systems. It costs less than traditional piping, bends around corners and obstructions without fittings, and comes in different colors to make identification easier. PEX resists freezing more effectively than other types of piping, retains its original shape, and gives users choices when they select fitting systems.

One of PEX’s limitations comes to mind during the bright days of spring: it cannot be exposed to direct sunlight. The ultraviolet (UV) rays of the sun break PEX tubing down and make it brittle. PEX that runs outside should normally be buried. If this is not an option, we recommend sleeving the PEX in PVC.

SharkBite Fittings - Great for DIY

SharkBite fittings are easy to use and great for small jobs. They are push-fit style fittings that you can push right onto either PEX or copper to create your connection. They are more expensive by piece than other fittings, but they also don’t require you to invest in a tool. If you are doing a one-time DIY project or just making some repairs, SharkBite fittings may be a great choice. You can find all sizes and styles of SharkBite fittings at www.supplyhouse.com in the PEX fittings category.