Stop leaks before they start in older homes by catching early warning signs, lowering repair costs, avoiding emergencies, and gaining peace of mind with a structured routine you can complete in under 30 minutes per month. A practical, homeowner-friendly preventive maintenance system tailored to 1970s–1990s plumbing. It guides you through a 30-minute monthly routine with checklists, leak hot-spot maps, quick diagnostics for water pressure and valves, and decision trees to know when to DIY, monitor, or call a pro. Includes age-based replacement schedules, budgeting templates, and preventive ROI estimates.