Tankless Water Heater in Creedmoor, NC

Does SGWASA water need special care in a tankless unit?

A little. The South Granville Water and Sewer Authority treats water from Lake Holt and uses chloramine as its final disinfectant. Its 2025 report does not list hardness, so the scale load on a heat exchanger is something to test for rather than assume. SGWASA has also said Creedmoor's 2025 testing showed elevated iron and manganese, with much lower levels after flushing, and it describes the resulting discoloration as aesthetic, not a safety issue. For a tankless unit, that kind of sediment is mostly a maintenance point: the inlet screen may need cleaning more often, and a periodic flush keeps the heat exchanger clear.

What does the check valve rule mean for my water heater?

SGWASA's service rules require customers to install and maintain a private cut-off valve and a check valve or backflow preventer on their side of the meter. A check valve closes the plumbing off from the street, so pressure from heated water has nowhere to go. With a storage tank, that is why an expansion tank is commonly added. A tankless heater holds very little water, so the need is smaller, but a plumber should still look at the whole system before removing an existing expansion tank.

Who permits the work, and can I get gas?

Creedmoor's own site says Granville County handles building permits, plan review and inspections in the city, while the City issues zoning compliance permits. The County inspections office is at 122 Williamsboro Street in Oxford. For fuel, Enbridge Gas North Carolina lists Granville County in its territory, though service depends on the street. Homes without a gas meter can use a propane or electric tankless unit. Census survey data put Creedmoor's median build year at 1995, so most panels and utility spaces are newer than in Oxford or Roxboro.

Local note

About 30% of Creedmoor's homes were built before 1980. In those, the old flue and gas line are the first things to check. If you notice a gas smell at any point, leave the house and call 911 or Enbridge Gas at 1-877-776-2427 from outside.