About

Century-Strong Plumbing Excellence: Jersey City's Trusted Local Experts Since 1921

When plumbing emergencies strike or renovation projects demand precision, North Jersey area residents and businesses turn to William J. Guarini Inc.—a locally owned plumbing company with an unmatched legacy spanning over 100 years. Founded in 1921, our family business has weathered economic shifts, technological advances, and changing customer needs while maintaining one unwavering commitment: delivering superior plumbing services with integrity and craftsmanship.

As proud members of Local Union UA24, our team brings union-certified expertise to every job, whether it's a residential pipe repair, commercial installation, or complex system overhaul. Being fully insured and fully bonded means you're protected at every step, giving you peace of mind that your property and investment are in capable, responsible hands. Our longevity isn't just about staying in business—it's about building lasting relationships with generations of Jersey City families and commercial enterprises who've learned they can count on the Guarini name.