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Partially Drain the Tank — Drain the Water Heater Tank

Beginner4 hours

Part of project

How to Replace an Electric Water Heater Heating Element · Step 3 of 10

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In this video

Connect a garden hose to the drain valve located at the bottom of the water heater tank. Place the other end of the hose in a floor drain or a large bucket. Open the drain valve to begin draining water from the tank. To speed up the draining process, lift the lever on the T&P relief valve; this allows air to enter the tank, breaking the vacuum. Continue draining until the water level is below the T&P valve port.

Goal: Lower water level below the T&P valve

  • The water draining from the tank is extremely hot. Be careful to avoid burns.

Used in this video

  • Garden Hose (brand: none, Tool Type: Plumbing Tools, Material: Rubber, Garden Hose Length: 25ft)Draining water from the tank.
  • Bucket (brand: none, Tool Type: Plumbing Tools, Material: Plastic, Bucket Size: 5 gallon) · optionalCollecting drained water if a floor drain is not available.
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FAQs

What are the most critical safety steps I must take before replacing an electric water heater heating element?

Always start by turning off the power to your water heater at the circuit breaker and verifying it's off with a non-contact voltage tester. Next, shut off the cold water supply to the heater and drain the tank completely. Failing to do so can result in serious electrical shock or water damage.

Can I use a regular socket wrench to remove the heating element, or do I really need a specialized element wrench?

While a standard socket might fit, a specialized heating element wrench (like the Rheem PROTECH Dual Head Element Wrench listed) is highly recommended. It's designed for a snug fit, reducing the risk of stripping the element's hex head, which can make removal significantly more difficult.

The project is listed as 'beginner' and '4 hours' – is this realistic for someone with no plumbing experience?

Yes, it's beginner-friendly as long as you follow all safety procedures and instructions carefully. The 4-hour estimate accounts for the time-consuming process of fully draining and then refilling the water heater tank, along with potential delays like a stubborn element.

What's the most common mistake new DIYers make when replacing a heating element, and how can I prevent leaks?

A common mistake is not fully draining the tank or not properly seating the new element's O-ring/gasket. To prevent leaks, ensure the O-ring is perfectly positioned before tightening the new element firmly, but not excessively, and carefully monitor for drips after refilling.