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FAT05 1/2″ Brass PEX End Water Hammer Arrestor Tee

  • A water hammer arrestor is a chamber filled with air designed to damper the convulsive effects of water hammer on a plumbing system
  • This piston is fitted with an O-ring, which creates a seal between air and water in order to prevent the air from escaping into water, and the water from mixing with the air, in the chamber. Thus, the pressurized air pocket is not as susceptible to being submerged in water as it would be without a seal, and will not easily lose its pressure difference, because of the seal this O-ring creates, and so lasts much longer and works effectively
  • It functions in this way: as pressure increases, the piston works up and down, by means of the pressure and counter pressure of the water and the air. Because of these contrary forces, water hammer is diminished in a less drastic and less damaging way than without the arrestor, the forces slowly acting upon one another and neutralizing one another
  • Piston arrestors vary in type by the size of a fitting, the amount of pressure exerted on the line, among other things. An appropriate selection must take these variables into consideration

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