Holy City Plumbing provides professional backflow preventer installation and repair services throughout Mount Pleasant and Charleston, SC. Our licensed plumbers install required backflow devices for irrigation systems, pool equipment, and commercial properties to protect your water supply from contamination. We install all types of backflow prevention devices including reduced pressure zone valves, double check valve assemblies, atmospheric vacuum breakers, and pressure vacuum breakers to meet local code requirements.

Services we provide:

Backflow preventer installation
Backflow device repair
Cross-connection surveys

Note: We do not perform annual backflow testing. Please contact our office for trusted testing partner recommendations.

Where backflow protection is required: Irrigation systems, pool equipment, commercial properties, fire suppression systems, and boiler connections.

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.

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Need help now? Give us a call!

843-817-1388

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

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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