Professional Backflow Prevention Services

Protect your Mount Pleasant or Charleston home's water supply with Holy City Plumbing's expert backflow valve installation and testing services. We ensure your drinking water stays safe and meets all local requirements.

Call (843) 817-1388 for backflow valve service - Protect your family's water supply.

Complete Backflow Services

Backflow preventer installation - Required devices for irrigation and commercial systems
Backflow device repair - Fix malfunctioning prevention devices
Cross-connection surveys - Identify potential water contamination risks

Please note: We do not perform annual backflow testing. Please content our office for a recommendation for our trusted testing partners.

Types of Backflow Devices

Reduced pressure zone valves - Maximum protection for high-hazard applications
Double check valve assemblies - Standard protection for residential irrigation
Atmospheric vacuum breakers - Simple protection for hose bibs
Pressure vacuum breakers - Common protection for sprinkler systems
Residential dual check valves - Basic protection at water meter connection

When Backflow Protection is Required

Irrigation systems - Sprinkler and landscape watering systems
Pool equipment - Swimming pool fill lines and chemical feeders
Commercial properties - Businesses with potential contamination sources
Fire suppression systems - Building fire protection water systems‍
Boiler connections - Heating system water supply protection

We are your Local Lowcountry Plumbers

Experienced Team

Our skilled plumbers bring years of expertise to every job, ensuring quality workmanship and reliable solutions.

Local, Trusted, and Family-Owned

As a locally owned business, we treat every home like our own, providing honest service with care and integrity.

Learn More

Need help now? Give us a call!

843-730-3583

Call US NOW

We are fast, reliable, and efficient. Our team is not only highly skilled and knowledgeable but also trustworthy and accommodating. Contact us today — we're ready to provide the expert service you need, right when you need it!

Local, family-owned Lowcountry business

Committed to giving back to local animal charities

Master Plumbers with over a decade of hands-on experience

Complete this form if you would like to request service:

Thank you! Your submission has been received!

Oops! Something went wrong while submitting the form.

Reviews from your neighbors

I wish I had found Holy City sooner! Three different plumbers tried to fix my outdoor drainage system. He troubleshoots each issue thoughtfully and walks me through possible solutions with emphasis on what is best for ME.

Susan Norton

Our Restaurant Group has been using Dave for 10+ years. He is always quick to arrive and fix our problems. He sometimes has to get creative to solve some of the crazy restaurant issues we have below sea level. We couldn't imagine a better plumber for our needs!

Jessica DeZinna

Dave was very professional and helped us with a toilet issue. He was very quick to come to our house and get it taken care of. I will use Holy City Plumbing going forward. Great local business!

Blake Banks

I recommend them highly. David is very professional, diagnosed the source of the leak and corrected the problems quickly. It was a pleasure to work with them!

Sola Kim

Backflow Valves