Jonesborough is Tennessee's oldest town, and its historic district has plenty of homes and storefronts with plumbing that's been patched by several generations of plumbers. Older cast-iron drains, mixed pipe materials and tight crawlspaces are common here, so repairs take a plumber who's comfortable working around what's already there.
Outside the historic core, newer subdivisions along the US-11E corridor have the usual modern issues: water heaters reaching the end of their life together, PEX fitting failures and clogged main lines.
Calls from Jonesborough and the 37659 ZIP code are routed to plumbers who cover Washington County.