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If you are not aware of the difference between the two, you might accidentally install the wrong one.

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Installation of a water hammer arrestor
Getting a water hammer arrestor is a simple solution to one of the most common problems in residential piping systems. When a valve closes quickly, water travels through the plumbing system, creating shock waves. These can be damaging to the appliances connected to them.
Water hammer arrestors work by absorbing the shock wave, or hammer, that occurs when water flows through a pipe. They can also be used to eliminate piping vibration. There are many different kinds available. You will want to buy the correct one for the job.
Most home owners can install a shock-absorber on their clothes washer shut-off valves. They also need to be installed on all quick-closing Automatic Control Valve. You can also install one on your hot water supply line.
Water hammer arresters are usually inexpensive. They are designed to fit between the shut-off valve and the supply line. Some are screw-on. Other ones have a hose connection. It is usually best to install one arrestor on the hot water supply line and another on the cold water line.
Water hammer arresters also come in special sizes for specialized applications. They can also be rechargeable. If you are installing a water hammer arrestor, you should test your home water pressure before starting. If you have widespread water hammer problems, you may need to install a pressure regulator.

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CSA anti-slam air valves
Among the plethora of air vents available on the market, CSA's anti-slam air valves stand out from the pack. These spherical cylinders come in several different designs and are backed by a full service warranty. The most notable features are a spring-loaded poppet and a vacuum seal. The latter ensures that even if your air conditioner leaks, your piping will remain leak free.
The CSA SCA-C is a surprisingly capable triple function air release valve that is made from ductile cast iron. It has a stainless steel seat and adjustable nozzles for optimum flow control. Its small size and easy installation make it a perfect fit for any piping job. The CSA SCA-C has the best CSA rating among all air valves in its class. The CSA SCA-C is the smart choice for air vents in the home and office. Whether you are in the market for a replacement valve or a whole new system, CSA can help you make the right choice. For more information on CSA's air vents and more, visit CSA's online product catalog. The CSA SCA-C is available in standard, heavy duty, or oversized sizes. For larger jobs, CSA can provide custom designs. CSA's online product catalog features over 300 different piping products. This includes air vents, Flexible check valve, meter and control valves, sand filters, and more.
CPCV and PEX
CPVC and PEX are two different types of plastic piping materials. During the construction of your home, you will need to decide which piping material is best for your water distribution system.
CPVC piping is made from thermoplastic and is easier to install. It is also much more durable than PEX. It is recommended for water treatment facilities and can withstand high temperatures. However, it is susceptible to bursts.
PEX is a flexible plastic tubing system that is mainly used for plumbing applications. The pipe is constructed from an extrusion process, which involves pulling the tubing out through a die. The pipe can be inserted into fittings like copper and is also flexible enough to fit under a slab. It is also used for hot and cold water supply lines.
In the United States, the CPVC piping has been approved by all national building codes for potable water use. It is also recommended for water treatment facilities that handle concentrated chlorine disinfectants.
PEX tubing is flexible enough to be installed below freezing. It can also be installed in sidewalks. However, it does not have a temperature rating of 100psi at 180degF in chlorinated water. It is also susceptible to UV exposure. This can result in decreased impact resistance and discoloration.