Vacuum Breakers and Safety Valves

Good evening dear Plumbing Knowledge team. Today we will cover one more topic related to working with water piping. 

We will start with vacuum breakers that are helpful when working with water supply systems that are designed to not allow water to back up into the house.

Vacuum breakers prevent air locks and back-siphoning of water. The vacuum breaker works as a type of sensor that detects when back pressure is building and then activates so that the air lock is eliminated. In a previous post we covered how vacuum breakers can be very useful to create freeze-proof sillcocks that help to deal with the situation when a house creates an air lock which then allows water to freeze. 

The next topic will cover in this post has to do with check valves, designed to keep water from flowing backward through a line. The check valve does this by implementing a flapper that is designed to allow the direction of water in just one direction, and thus, as a result, prevent cross migration through faucets or preventing the city sewer main from backing into your home. 

The final topic is pressure-reduction valves, which come in handy when the pressure from water mains is higher at your home. An ideal pressure is 40-60 psi's. Sometimes, however, when city mains may have pressures that are higher than 70 psi. In this scenarios, installing pressure reduction valves is a great solution to cut back the pressure since too much pressure can cause water leaks and running toilets. 

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