William J. Guarini Inc.

William J. Guarini Inc. traces its roots to 1921, making it one of the oldest continuously operating plumbing contractors in the Garden State. Based in Jersey City, this family-established business has accumulated 138 customer reviews averaging 4.4 stars, serving residential, commercial, and municipal clients across Hudson County, Bergen County, and Essex County. Their teams operate from Jersey City headquarters with daily service hours stretching from 7 AM to 5 PM, handling everything from fixture swaps to full-scale new construction utility installation.

What distinguishes Guarini from newer competitors is their infrastructure depth. The company maintains in-house capabilities for excavation work, gas line plumbing, backflow prevention testing, and sewer drain services that many area plumbers subcontract out. Their water heater division handles both traditional tank units and boiler installation for heating systems, while their chimney liner service addresses a niche need common in older Hudson County residential buildings. They also participate in the PSE&G replacement program, allowing qualifying homeowners to receive new hot water heaters through utility rebates.

Recent reviews name specific technicians who delivered differentiated experiences. Dominic arrived quickly for one customer's plumbing emergency and completed the repair to the homeowner's satisfaction. For Israel From's hot water heater replacement under the PSE&G program, Guarini plumbers arrived on time, explained the expansion valve necessity, installed the component, and cleaned the worksite thoroughly. Ankur Patel's review specifically credits office staff member Rachel with responsive communication throughout a sewer repair project, noting the crew's careful consideration of neighbors and property during excavation work.