Quality Plumbing Services for New Castle County, DE and the surrounding areas

Every office and home needs a reliable plumbing system, so your fixtures and piping should be regularly protected, inspected and maintained. Clogged drains, toilets, and sinks can be problematic, but a hidden piping obstruction or leak can result in substantial structural damage.


For more than 40 years, William G. Day has offered comprehensive plumbing services to residents and businesses in Hockessin, Wilmington & Newark, DE and the surrounding community. We're skilled and experienced in every aspect of the commercial and residential plumbing repair, installation and maintenance process. Here are some of our most popular plumbing services:

  • New Plumbing Installation: We offer complete new construction services for homes and commercial buildings. This includes system design, plans and permits, piping, plumbing fixtures, water heaters and sewer connections. Our licensed plumbers understand the challenges of new construction job sites, and they always strive to maintain a strict schedule.
  • Plumbing Repair: All our certified plumbing mechanics are equipped with state-of-the-art diagnostic tools to identify leaks and obstructions quickly. We carry many common parts in our service vehicles, so most plumbing repairs are completed in a single visit.
  • Plumbing Fixtures and Equipment: Modern plumbing fixtures are packed with convenient features, but they're often difficult to install. Let a certified plumber mount your fixtures, so they have that clean look of a professional installation.
  • Repiping Service: Our comprehensive repiping services are designed for those with restricted, corroded or leaking pipes. We remove old compromised copper, galvanized or polybutylene systems and replace them with chemically-resistant thermoplastic or fresh copper pipe.
  • Water Heater Installation/Water Heater Replacement: Hot water is a necessity, so your water heater never rests. Over time, it can become less efficient and more prone to breakdowns. We fix common water heater problems, including failed thermostats, broken thermocouples and worn out burners. We stock all water heater styles, including electric, gas and tankless models.
  • Sewer Line Inspection and Repair: Sewer line obstructions are serious, and your contractor should use the latest advanced technology to identify the location and severity of the clog or leak. Once we know the nature of the problem, our technicians can remove the obstruction with minimally invasive techniques that save time, money and ground cover. We also replace or repair defective sections of pipe if necessary.


Your plumbing system plays a critical role in your family's daily routine, so don't take a chance with a handyman or a do-it-yourself project. William G Day Company is an experienced and knowledgeable plumbing contractor who understands every phase of the plumbing installation, repair, and maintenance process.

If you have a plumbing issue, call one of our friendly representatives to arrange an appointment today. Make sure you ask us about our $125 plumbing inspection plan. Our service areas include but are not limited to Hockessin, Wilmington & Newark, DE.