Pex pipe water hammer arrestor: the ultimate guide to avoiding plumbing disasters
What To Know
- Installing water hammer arresters on PEX piping is an effective way to prevent the damaging effects of water hammer.
- Remember, investing in water hammer arresters is a worthwhile investment that protects your pipes, fixtures, and the tranquility of your home.
- How do I know if I need a water hammer arrester.
PEX piping, renowned for its flexibility and durability, has become increasingly popular in residential and commercial plumbing systems. However, homeowners and contractors often wonder whether water hammer arresters are essential for PEX pipes. This blog post aims to address this critical question, providing comprehensive insights into the benefits, considerations, and installation guidelines of water hammer arresters for PEX piping.
Understanding Water Hammer in PEX Piping
Water hammer is a sudden pressure surge that occurs when running water is abruptly stopped. This surge can generate loud banging noises and potentially damage pipes and fixtures. In PEX piping systems, water hammer can be particularly concerning due to the material’s inherent flexibility.
Benefits of Water Hammer Arresters for PEX Pipes
Water hammer arresters effectively mitigate the damaging effects of water hammer by:
- Reducing Noise: They absorb the pressure surge, preventing the loud banging sounds associated with water hammer.
- Protecting Pipes and Fixtures: By reducing pressure surges, water hammer arresters protect PEX pipes, valves, and other fixtures from damage or failure.
- Extending System Lifespan: Minimizing water hammer helps prolong the lifespan of plumbing components, reducing maintenance and replacement costs.
Types of Water Hammer Arresters for PEX Piping
Two main types of water hammer arresters are commonly used for PEX piping:
- Air Chamber Arresters: These arresters utilize an air cushion to absorb pressure surges. They are typically installed near water-using appliances, such as washing machines or dishwashers.
- Spring-Loaded Arresters: These arresters employ a spring-loaded piston to absorb pressure surges. They are often installed on longer pipe runs or at the end of branches.
Considerations for Installing Water Hammer Arresters
Before installing water hammer arresters, consider the following factors:
- Pipe Size: Choose arresters that are appropriately sized for the diameter of the PEX pipe.
- Pressure Rating: Ensure that the arresters are rated for the water pressure in your system.
- Location: Install arresters near sources of water hammer, such as appliances or valves.
- Orientation: Air chamber arresters must be installed vertically, while spring-loaded arresters can be installed horizontally or vertically.
Installation Guidelines for Water Hammer Arresters
Installing water hammer arresters on PEX pipes involves the following steps:
1. Cut the PEX pipe: Cut the pipe where you want to install the arrester.
2. Insert the PEX insert: Insert a PEX insert into each end of the cut pipe.
3. Attach the arrester: Slide the water hammer arrester onto the PEX inserts.
4. Tighten the clamps: Use PEX clamps to secure the arrester to the pipe.
5. Test the system: Turn on the water supply and check for any leaks or noise.
Exceptions to the Rule
While water hammer arresters are generally recommended for PEX piping systems, there are certain exceptions:
- Short Runs: For very short pipe runs (less than 5 feet), water hammer may not be a significant issue.
- Low-Pressure Systems: In systems with low water pressure (below 50 psi), water hammer is less likely to occur.
- Water-Saving Fixtures: Fixtures that reduce water flow, such as low-flow toilets and showerheads, can minimize water hammer.
Alternatives to Water Hammer Arresters
In some cases, alternatives to water hammer arresters may be considered:
- Water Hammer Dampeners: These devices absorb pressure surges but do not eliminate them completely.
- Expansion Tanks: Expansion tanks provide a reservoir for excess water, reducing pressure fluctuations.
- Flexible Connections: Using flexible connectors for appliances can help absorb some water hammer.
Key Points: Enhancing Plumbing System Performance
Installing water hammer arresters on PEX piping is an effective way to prevent the damaging effects of water hammer. By understanding the benefits, considerations, and installation guidelines, homeowners and contractors can ensure optimal plumbing system performance and longevity. Remember, investing in water hammer arresters is a worthwhile investment that protects your pipes, fixtures, and the tranquility of your home.
Frequently Asked Questions
Q: How do I know if I need a water hammer arrester?
A: If your PEX piping system experiences loud banging noises when water is turned off, you likely need a water hammer arrester.
Q: Can I install water hammer arresters myself?
A: Yes, installing water hammer arresters on PEX pipes is relatively straightforward with basic plumbing skills. However, it’s always advisable to consult a licensed plumber if you are unsure.
Q: How often should I replace water hammer arresters?
A: Water hammer arresters typically last several years, but it’s recommended to inspect them annually and replace them if they show signs of wear or malfunction.
