Taunton & Raynham, MA Backflow Repair, Prevention, & Testing Services
If you’re looking for a reliable backflow contractor in Taunton & Raynham, MA, look no further than Cotti Johnson HVAC, Inc. We’re a family-owned and operated company with over 75+ years of experience.
When you hire us, you get a dedicated team of professionals committed to delivering high-quality work at honest prices. Additionally, our 100% satisfaction guarantee provides you with peace of mind, ensuring you’re getting the best value for your money.
Taunton, MA Backflow Repair Services
A backwater valve is a critical plumbing device that’s designed to keep contaminated water from flowing backward into your home’s clean water supply. It’s typically installed where potable water connects to non-potable sources, like irrigation systems, sprinkler lines, or fire suppression systems. So, if this device fails, you risk water contamination in your home. Here are signs your backwater valve needs to be repaired or replaced.
- Water Leaks: If you notice leaking water around the backflow device, especially near the valve body or test cocks, it could indicate internal wear, a damaged seal, or corrosion. Small leaks can develop into larger issues if left unattended.
- Water Discoloration: Brown, yellow, or rusty water from your taps may signal that dirty water is mixing with your clean water supply. This is often a sign of backflow and a failing preventer.
- Odd Tastes or Smells: Water that smells like chlorine, sulfur, or chemicals—or tastes metallic or foul—can point to contamination from lawn chemicals, sewage, or other non-potable sources.
- Reduced Water Pressure: A sudden or noticeable drop in water pressure could be a sign of a malfunctioning backflow preventer that’s stuck partially closed or clogged with debris.
- Failed Inspection or Test: Annual testing (required in many areas) may reveal problems even if you haven’t noticed any symptoms. A failed test indicates that the device is no longer providing proper protection and requires immediate repair or replacement.
Don’t let an unseen water leak ruin your home. Call us for our expert water leak detection service today!
Our Backflow Maintenance Services
One of the best ways to avoid needing backflow replacement or repair is to keep your device in tip-top condition. Proper maintenance keeps your water supply safe and helps avoid costly repairs, while also ensuring compliance with local regulations.
Here’s how to maintain your backwater valve for longevity and performance.
- Schedule annual testing
- Inspect the device every few months
- Keep the area clean and accessible
- Make repairs promptly
- Winterize if needed
Are your pipes noisy or do they constantly leak? Call us for our expert repiping service.
Backflow Installation & Replacement in Bristol and Plymouth Counties
Installing a backflow preventer is a smart way to protect your home’s drinking water from contamination. If you don’t have one or need a backflow replacement, here are a few reasons to address it as soon as possible.
- Protects Your Water Supply: Prevents dirty water from lawn irrigation, chemicals, or sewage from flowing back into your clean water lines.
- Promotes Health and Safety: Reduces the risk of waterborne illnesses caused by pollutants entering your drinking water.
- Complies With Local Codes: Many municipalities require backflow preventers, especially for homes with sprinkler systems or commercial properties.
- Prevents Costly Repairs: Helps you avoid expensive damage to your plumbing and potential medical bills from contaminated water.
- Peace of Mind: You’ll know your family or business is protected against unexpected backflow incidents.
Here are some of our current limited time offers, call for additional details. All specials are subject to availability, some terms apply, some terms based on credit approval. Offers cannot be combined.
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FAQ's
- Do you need a permit to replace a backflow preventer in Taunton, MA?
- Most Massachusetts towns require a permit before a backflow preventer is replaced, because the device protects the public drinking water supply from contamination. Rules and inspection timelines vary by city. Cotti Johnson HVAC pulls the required permit and schedules the follow-up inspection for backflow replacements in Taunton, MA, so homeowners do not have to deal with town paperwork themselves.
- How much does backflow prevention testing or repair cost?
- Annual backflow preventer testing typically costs $75 to $150, while repairing or replacing a faulty valve can run $200 to $600 depending on the device size. Cotti Johnson HVAC performs both testing and repair for homeowners in Taunton, Massachusetts and Plymouth County to keep the water supply protected and compliant.
- How often does a backflow preventer need to be tested?
- A backflow preventer typically needs to be tested once a year to meet Massachusetts plumbing code and keep the public water supply protected from contamination. Some commercial properties or irrigation systems may require testing more often depending on local water department rules. Cotti Johnson HVAC schedules annual backflow testing for homes and businesses throughout Plymouth County, Massachusetts.
- What is a backflow test?
- A backflow test checks whether a backflow preventer is properly stopping dirty water from flowing backward into the clean water supply. A certified tester attaches gauges to the device and measures pressure to confirm the internal check valves seal correctly. Cotti Johnson HVAC performs annual backflow tests for homes and businesses throughout Taunton, MA to keep water systems compliant.
- What is a backflow repair?
- A backflow repair fixes a preventer that failed its annual test, usually by replacing worn internal rubber seals, springs, or the check valve assembly that keeps water flowing in one direction. Small parts repairs often run $150 to $350. Cotti Johnson HVAC repairs and re-tests backflow devices for properties in Taunton, MA so the system passes local water authority requirements.
- What is backflow prevention?
- Backflow prevention is the use of a mechanical device to stop water from reversing direction and flowing back into the clean municipal supply, which could pull in contaminants from irrigation systems, boilers, or plumbing fixtures. It is required on many commercial and irrigation connections. Cotti Johnson HVAC designs and installs backflow prevention systems for customers throughout Massachusetts.
- Who can test a backflow device in Plymouth County, MA?
- Only a certified backflow tester with state-recognized training can legally test a backflow preventer, because the test requires calibrated gauges and knowledge of local water authority reporting rules. Homeowners cannot self-certify results. Cotti Johnson HVAC employs certified backflow testers who serve Plymouth County, MA and file test results directly with the local water department.
- Can I do backflow testing myself?
- No, backflow testing cannot be done by homeowners because it legally requires a certified tester using calibrated equipment, and most towns will not accept self-reported results. Attempting it without training can also damage the device or leave a contamination risk undetected. Cotti Johnson HVAC handles certified backflow testing for homes and businesses in Taunton, MA and nearby communities.
Whether you need backflow certification or a backwater valve installation, you can count on the pros at Cotti Johnson HVAC, Inc. Book us today in Taunton, MA at 508-301-1831.


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