The water flowing through the pipes across your home is designed to travel in one direction. When it flows backward, you’re dealing with backflow. The worst cases of backflow can lead to sewer or wastewater mixing into your water supply line.
Many property owners in Hopkinton, MA, understand the importance of preventing backflow and have devices that help eliminate the risk. So, which plumbing devices prevent backflow?
As the most experienced plumber in Hopkinton, MA, A&L Plumbing, Heating, and Cooling has installed backflow prevention devices in countless properties across the area. We’ll look at some of the most common options in this post.
The Air Gap
This is the most basic method of backflow prevention. An air gap isn’t necessarily a device. It’s simply a piping work that ensures there’s adequate space between the water supply outlet and a fixture’s flood level. The separation helps keep water from siphoning back into the water supply system. It’s the backflow prevention option used in washing machines, dishwashers, bathtubs, and faucets.
Atmospheric Vacuum Breaker (AVB)
Atmospheric vacuum breakers feature a valve that stays open when water is flowing in the right direction. The valve will shut down quickly if it detects backflow due to a drop in pressure. Plumbers install these backflow prevention devices in outdoor spigots and irrigation systems.
However, if you’re wondering which plumbing devices prevent backflow and have AVBs in your sight, you should note that they won’t protect against continuous pressure.
Pressure Vacuum Breaker (PVB)
Pressure vacuum breakers are similar to AVBs. However, they are a lot more robust. They can hold up better against continuous pressure.
As in most parts of the country, property owners in Hopkinton, MA, have to install pressure vacuum breakers if their irrigation and sprinkler systems are connected to the municipal water supply. However, you can also install PVBs if you have significant concerns about backpressure.
Double Check Valve Assembly (DCVA)
As the name implies, the double-check assembly features two spring-loaded check valves that work independently. The assembly is effective at preventing backflow because if one valve fails, the second one can still kick in.
You can’t go wrong with a DCVA if you’re wondering which plumbing devices prevent backflow effectively for both residential and commercial properties in Hopkinton, MA. The device’s versatility means you can find it in everything from lawn irrigation systems to fire sprinkler setups.
Reduced Pressure Zone (RPZ) Assembly
The reduced pressure zone assembly features two check valves and an intermediate relief valve. If any of the check valves fail under back pressure, the intermediate relief valve will open up and release contaminated water outside. Thus, it’s another highly effective device for protecting your potable water system.
RPZ assemblies are not common in residential applications, though. You’re more likely to find them in restaurants, chemical plants, and hospitals.
Anti-Siphon Valve
Anti-siphon valves use a check valve and an air vent to prevent backflow. These units keep water flowing in one direction and will automatically close when water pressure drops. This helps block any reverse flow. The air vent prevents a vacuum from forming and drawing contaminated water back into your freshwater supply.
Which Backflow Prevention Valve Should You Go For?
Now you know which plumbing devices prevent backflow. However, since many of them can fit in different applications, you’re probably unsure of which one to use for your property.
The right option will vary from one property to another. But here’s a guide you can work with generally:
- Install an air gap for home faucets and sinks.
- Use pressure vacuum breakers, atmospheric vacuum breakers, or double check valve assemblies for irrigation and sprinkler systems.
- Use an RPZ assembly in commercial or industrial areas where chemical contamination is a major concern.
However, to avoid any costly mistakes, it’s best to seek guidance from a licensed and certified plumber on the matter. They will carefully evaluate your property and recommend the best devices (or combination of devices) you can go for.
Get Custom Backflow Prevention Solutions From Your Local Experts in Hopkinton, MA
Backflow can contaminate your fresh water supply, triggering a long list of health and safety concerns. Thankfully, it’s possible to completely avoid this problem with the right backflow preventer device.
Are you still wondering which plumbing devices prevent backflow? Do you need help with installing the best option for your property in Hopkinton, MA? Call A&L Plumbing, Heating, and Cooling today to book an appointment or to ask about our AC services.