When you run the washing machine or dishwasher do the pipes shake or make loud thumping noises? That’s probably water hammer at work. Solenoid-driven valves that close abruptly can be the worst offenders; suddenly stopping the flow of water creates a pressure spike behind the valve which can reverberate throughout the supply pipes in your house.
Most water hammer arresters absorb the reverberations with a pressurized cushion of air. But that air chamber can become waterlogged over time, so Sioux Chiefs Mini-Resters use a piston sealed with dual O-rings to separate the water from the air chamber.
Sioux Chief sells a wide variety of Mini-Resters for washing machines, tub and shower valves, toilets, ice makers, sinks, and other single-use applications. Prices range from $10 to $20.