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Ensure the faucet you opened earlier is still open. Close any other faucets. Go to the main shut-off valve near the tank and open it SLOWLY. This allows the system to fill gradually, preventing a violent 'water hammer' effect. Once water is flowing steadily from the open faucet, go to the electrical panel and turn the breaker for the well pump back to the 'ON' position. The pump should start. Immediately check all new pipe connections and fittings for any drips or leaks. Use a flashlight to get a clear view. If you see a leak, turn the power off, drain the system, and tighten or re-do the leaky connection.

You're viewing a step from: How to Replace a Well Pressure Tank

Beginner

30 minutes

2/4 Inventory

This guide provides comprehensive, step-by-step instructions for safely removing an old well pressure tank and installing a new one. The process includes de-energizing the system, draining the water, disconnecting plumbing and electrical components, preparing the new tank with the correct air pre-charge, installing new fittings, and testing the system for leaks and proper operation.

Based on content fromEZ-FLO / Eastman Plumbing Products· 200 subscribers

Frequently Asked Questions

What are the most critical safety steps I must take before beginning to replace my well pressure tank?

Absolutely always turn off the power to your well pump at the main electrical panel first. Then, fully drain the entire water system to relieve all pressure. This prevents electric shock, water damage, and injury from pressurized components.

How long should I expect this well pressure tank replacement to take, and what's the approximate material cost for a DIYer?

For a beginner, plan for 2-4 hours, assuming you have all tools and materials ready. The material cost, primarily for the new pressure tank and fittings, can range from $200 to $600, depending on the tank size and brand, plus a few dollars for tape and rags.

Why is correctly pre-charging the new well pressure tank so important, and what pressure should I set it to?

Pre-charging with air prevents the tank from becoming 'waterlogged' and ensures your pump cycles efficiently, extending its lifespan. Set the tank's air pressure (when empty) to 2 PSI below your well pump's 'cut-in' pressure (the pressure at which your pump turns on).

Which specialized tools are absolutely essential for replacing a well pressure tank, beyond basic household tools?

You'll definitely need a sturdy pipe wrench (like the 16-inch self-adjusting one mentioned) for plumbing connections, a tire pressure gauge to check the tank's pre-charge, and a water pressure gauge to monitor system pressure. Slip-joint pliers are also very helpful for various fittings.