What Happens if I Over-Crimp PEX?
PEX systems have become popular in modern plumbing due to their ease of installation, flexibility, and durability. The method of crimping PEX fittings uses crimp rings and PEX pliers. However, when crimping PEX, the pressure must be applied accurately to maintain the proper condition of the pipes. Therefore, over-crimping can cause problems that affect the integrity of the PEX system. This article will explore the consequences of over-crimping PEX and provide recommendations on how to prevent over-crimping.
What is PEX Crimping?
Crimping involves placing a crimp ring over the tubing, and then the fitting is squeezed using PEX pliers to surround the tubing and fit it tightly. It is essential to ensure that a good seal is formed between the PEX pipe and the fitting during crimping.
What is PEX Over-Crimping?
Over-crimping is a process in which force is applied to a crimp ring, which leads to deformation of the latter and possible damage to PEX tubing or fitting. The thought that over-crimping will give a better grip, such that it is more secure than it is, is wrong because over-crimping results in several problems that result in a weaker connection.
Consequences of Over-Crimping PEX
1- Cracked or Damaged PEX Tubing
The most apparent danger of over-crimping PEX is damaging the tubing. Any excessive pressure exerted on the crimp ring may harm the body of the PEX pipe by either scratching it up or constraining its diameter so that it becomes highly susceptible to cracks and leaks. The structure of the reinforced pipe will be less effective and collapse, even if the pipe does not crack under pressure.
2- Improper Sealing
Although crimping ensures a tight fit, over-crimping can lead to a loose fit. When applied with much force, a crimp ring applies more force to the fitting than to the pipe, resulting in gaps at the points of the secured crimp rings. These gaps can lead to leakage, which goes unnoticed until the effects, such as water damage, become conspicuous.
3- Premature Fitting Failure
PEX fittings come in the same way as engineered to be used with a certain amount of crimping force. When the PEX pipe is over-crimped, the pressure exerted on the fitting is beyond the usual standard, increasing the likelihood of the fitting to wearing out or failing. Parts of metals, for instance, may be adversely affected by an over-crimped ring, leading to shortened longevity or likely to lead to leakage in the existing system.
4- Increased Risk of Leaks
Over-crimping may result in a high possibility of leakages in the PEX plumbing system. Many problems associated with a plumbing system include Explosion, water damage, higher utility bills, and expensive repairs due to a leak. Also, they may go unnoticed, hence leading to molds and other structural damages within a specific period.
Read more: How to Use a PEX Crimp Tool
How to Avoid Over-Crimping
1- Use the Right PEX Pliers
Specific PEX pliers are designed to be ideal for PEX tubing, so one has to ensure that the proper PEX pliers are used. PEX pliers are designed to offer the necessary pressure while crimping to avoid under- and over-crimping. An ideal example is the iCrimp PEX Crimping Tool Kit.
2- Follow the Manufacturer Guidelines
Every PEX system has a set of rules for which kind of crimp rings, tools, and pressure should be used. When working with PEX, one must follow the manufacturer’s guidelines on the force necessary for the crimping process.
3- Use Go/No-Go Gauge
The Go/No-Go gauge is a tool that needs to be utilized to check whether your crimping job is successful. This gauge should be placed on a crimp ring after crimping. It means that if the ring fits into the “Go” section but not into the “No-Go” section, then you have formed the correct crimp. A good example is the iCrimp PEX Pipe Crimping Tool with Go/No-Go Gauge. By using this simple tool, you will be protected, not over-crimp the connections, and make sure that the connections are well-made.
4- Apply Consistent Pressure
Using the crimp tool, use equal and constant force when pressing. It is advisable not to jerk or twist the tool since this results in over-crimping, which can lead to uneven connections.
5- Practice on Scrap Pieces
As with any skill, it is wise to test the technique on something other than your actual plumbing system; hence, before engaging in actual crimping, it is advisable to use scraps of PEX tubing.
Final Thought
Some significant issues resulting from over-crimping PEX include pipe and fitting damage and leakage that can potentially affect your entire plumbing system. These problems can be avoided if one employs the right tools, follows manufacturer instructions, and uses a Go/No-Go gauge to guarantee proper PEX plumbing installation. Are you searching for suitable PEX pliers and crimping tools? iCrimp offers the most suitable PEX plumbing tools for your system to achieve the best results.
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