Founded in 1921
Free, On-Site Estimates
Emergency Service Available
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Expert Excavation Services in Jersey City, NJ
When your property needs excavation work, you want a plumber you can trust with over a century of proven experience. Since 1921, William J. Guarini Inc has been delivering reliable excavation services to residential and commercial properties throughout Jersey City and the surrounding areas. Whether you're dealing with a sewer line replacement, water main installation, or underground pipe repair, our skilled team handles every project with precision and care. As a locally owned company and proud member of Local Union UA24, we bring professional expertise to every dig site.
We're fully insured and bonded for your protection, and we back our work with a 1-year warranty on both workmanship and materials. Need help right away? Our 24/7 emergency service means we're available whenever you need us most. We also provide free, on-site estimates so you'll know exactly what to expect before any work begins. Reach out to William J. Guarini today to discuss your excavation needs.
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Why Choose Us
Free, On-Site Estimates
Emergency Services Available
Fully Bonded and Insured
Serving the Area for Over 100 Years
Warranties on Workmanship and Materials
Locally Owned

Sewer Line Replacement
Protect your property with professional sewer line replacement services designed to address damaged, collapsed, or aging sewer systems. Our excavation team safely removes and replaces failing sewer lines using quality materials and proven installation methods to restore reliable wastewater flow. We work efficiently to minimize disruption while providing long-lasting solutions that help prevent backups, leaks, and costly plumbing problems.
Trenchless Sewer Line Replacement
Replace damaged sewer lines with minimal disruption through our trenchless sewer line replacement services. Using advanced trenchless technology, we can install a new sewer line without extensive digging, helping preserve your landscaping, driveway, and property. This efficient, cost-effective solution restores reliable wastewater flow while reducing downtime and providing long-lasting performance.
Water Service Line Replacement
Ensure a safe, reliable water supply to your property with professional water service line replacement services. Whether your water line is leaking, corroded, damaged, or experiencing low water pressure, our excavation team provides efficient replacement solutions built to last. We use quality materials and proven installation techniques to restore dependable water flow while helping prevent future plumbing issues.
Curb Stop Replacement
Ensure reliable access to your property's water supply with professional curb stop replacement services. A damaged, leaking, or non-functioning curb stop can make it difficult to control water flow and may lead to costly issues if left unaddressed. Our excavation team provides safe, efficient curb stop replacements, restoring proper operation and helping maintain the integrity of your water service connection.
Water Meter Replacement
Keep track of your property's water usage with professional water meter replacement services. Whether your water meter is outdated, damaged, inaccurate, or no longer functioning properly, our excavation team provides efficient replacement solutions to restore accurate readings and reliable performance. We handle the installation process safely and professionally, helping ensure your water service remains dependable and compliant with local utility requirements.
Backflow Valve Installation
Protect your water supply from contamination with professional backflow valve installation services. Backflow valves help prevent wastewater and harmful pollutants from flowing back into your clean water system, providing an added layer of safety for your home or business. Our experienced team installs reliable backflow prevention devices that meet local code requirements and help ensure the long-term protection of your water supply.
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At , William J. Guarini Inc. we take pride in providing exceptional plumbing services to our customers. We would be grateful if you could share your thoughts about our business with others. Your feedback helps us improve and helps others make informed decisions. Please take a moment to leave a review of William J. Guarini Inc. and let others know what you think.










