Multnomah County · Portland–Vancouver–Hillsboro metro
Plumbing help in Portland, OR
Older PipesModerately Hard Water
Portland's Bull Run water is exceptionally soft, so scale rarely causes trouble. Plumbing issues come from an older housing stock, roots in clay sewer laterals, a long wet season and the odd winter freeze.
- Median home built
- 1966
- Built before 1980
- 62%
- Owner-occupied
- 51%
- Water hardness
- Moderately hard
- ≈ 5 grains/gal
- Winter
- Occasional hard freezes
- Plumbing code
- UPC
The plumbing calls that come up most in Portland
- Sewer Line Repair
Older homes often have clay laterals that roots from Portland's big street trees get into.
- Sump Pump Repair and Installation
Months of rain keep groundwater high around basements and crawl spaces.
- Repiping
Over 60% of homes predate 1980, and galvanized supply pipe is common in older houses.
Emergency plumbing in Portland
Call (833) 878-1592Shut off your main water supply if it's safe to do so. The emergencies below are listed most likely first for Portland homes, based on local conditions.
What's behind the walls of Portland's older homes
The median home in Portland was built in 1966, and 62% of homes predate 1980. Homes from that era were typically built with copper or galvanized supply, cast iron drains, clay or cast iron sewer laterals.
- Galvanized steel supply (1900–1960)
- Copper supply (1950–2000)
- Polybutylene (some homes) (1978–1996)
- PEX / CPVC (1995–today)
Plumbing code and permits in Portland
Plumbing in Portland follows the 2023 Oregon Plumbing Specialty Code, based on the 2021 Uniform Plumbing Code. [2]
Portland's water: moderately hard
Bull Run water, Portland's main supply, is soft at about 7 to 11 ppm (roughly half a grain per gallon), while its backup groundwater supply is moderately hard at about 80 ppm (5 grains per gallon). [1]
When Portland gets a hard freeze
Occasional hard freezes · 62% of Portland homes were built before 1980
Plumbing services for Portland homes
Portland plumbing questions
Is Portland water soft?
Very. Bull Run water runs about 7 to 11 ppm, around half a grain per gallon. When the city uses its groundwater backup, hardness rises to about 5 grains per gallon.
Which plumbing code applies in Portland?
The Oregon Plumbing Specialty Code (2023), based on the 2021 Uniform Plumbing Code.
Why do Portland sewer lines clog with roots?
Many older homes have clay laterals with joints that let moisture escape, and roots from large trees follow it inside. A camera inspection shows where, and relining or spot repair stops repeat clogs.
Sources (3)
- U.S. Census Bureau, ACS 2024 1-year (B25035) · checked 2026-10-01
- Portland Water Bureau, 2025 Drinking Water Quality Report · checked 2026-10-01
- Oregon Building Codes Division, Plumbing Code Program · checked 2026-10-01