Grade the base at 1–2% slope toward a gravel/permeable bed or a code-approved drain/graywater route. If tying into the building drain, include a P-trap and proper venting per local code. See layout and code tips in How to Install an Outdoor Shower and California Building Code 2025: Outdoor Shower Kit Plumbing & Graywater Rules Explained.
Yes—hose-bib setups are fine for seasonal installs; add a vacuum breaker/backflow preventer. Hot water options include indoor tie-in, tankless/electric, or solar. Typical low-flow heads run 1.8–2.5 GPM (~9–12.5 gallons for a 5-minute rinse). See connection options in How to Install and design ideas in 15 Outdoor Shower Plumbing Ideas.
Choose 304/316 stainless and brass valves, rinse salt spray regularly, and in freezing weather shut off, drain lines, remove the showerhead/handset, and open low-point drains or blow out lines. Step-by-step checklist: How to Winterize an Outdoor Shower.
Plan the location (privacy, drainage), add blocking if needed, mark & drill for the valve/anchors, run supply with shutoffs and a backflow device, mount & seal penetrations, build drainage, then pressure-test and finish. Full walkthrough and permit pointers: How to Install an Outdoor Shower and California 2025 Code Guide.