Overview of the 2025 Plumbing Code Updates

As of 2025, updated plumbing codes are in effect across Washington State, including Vancouver and Clark County. These changes aim to improve water efficiency, safety, and environmental sustainability in both residential and commercial construction. For builders, homeowners, and contractors, understanding these updates is essential to avoid delays, inspection failures, or costly rework.

Key Code Changes to Be Aware Of

Some of the most impactful updates include:

• Stricter low-flow fixture requirements for toilets, faucets, and showerheads to improve water conservation.
• Revised pipe sizing guidelines to accommodate updated fixture units and promote system efficiency.
• New backflow prevention standards for certain systems, especially where irrigation or fire suppression is involved.
• Enhanced inspection requirements for pressure testing, venting, and material verification.
• Gray water and rainwater reuse provisions to encourage sustainable building practices.

These changes affect both new builds and major remodels, making early planning with an experienced plumbing contractor more important than ever.

Stay Ahead with RPI Plumbing & Fire

At RPI Plumbing & Fire, we stay up-to-date on every local and state code change so you don’t have to. Whether you're a builder managing multiple projects or a homeowner navigating your first build, we ensure your plumbing systems are designed and installed to meet 2025 code requirements from day one.