如何冲洗热水器：分步指南How to Flush a Water Heater: Step-by-Step Guide

每年冲洗热水器可以去除沉积物、提高效率并延长寿命。以下是完整的操作指南——或者让我们帮您完成。Flushing your water heater annually removes sediment buildup, improves efficiency, and extends its life. Here's a complete guide — or let us do it for you.

Why Flush Your Water Heater?

NYC's water supply contains minerals that settle as sediment at the bottom of your water heater tank. Over time, this layer of sediment:

• Reduces heating efficiency (sediment insulates water from the burner)
• Causes popping and rumbling noises
• Accelerates tank corrosion
• Reduces available hot water capacity
• Can clog drain valves and pipes

DIY Flushing Steps

What You'll Need

• Garden hose
• Bucket
• Flathead screwdriver (for some drain valves)
• Gloves (water will be hot)

Step 1: Turn Off Heat Source

Gas: Turn the gas valve to "Pilot" position
Electric: Turn off the breaker

Step 2: Wait

Let the water cool for at least 1-2 hours to avoid scalding. Or, run hot water from a faucet for 10 minutes to use up hot water.

Step 3: Turn Off Cold Water Supply

Close the cold water inlet valve on top of the water heater.

Step 4: Connect Hose to Drain Valve

Attach a garden hose to the drain valve near the bottom. Run the other end to a drain, outside, or into buckets.

Step 5: Open a Hot Water Faucet

Open a hot water faucet somewhere in the house to allow air into the system (prevents vacuum).

Step 6: Open Drain Valve

Open the drain valve and let water flow until it runs clear. This may take 5-20 minutes depending on sediment levels.

Step 7: Flush with Fresh Water

Briefly turn on the cold water supply to stir up remaining sediment. Let it drain. Repeat 2-3 times until water is clear.

Step 8: Close and Refill

Close drain valve, remove hose, turn on cold water supply. Let tank fill completely (water flows from the open hot faucet when full). Close the faucet. Turn heat source back on.

When to Call a Professional

• If the drain valve is stuck or corroded
• If water is extremely dirty or has large chunks
• If you're not comfortable with the process
• For tankless water heater descaling (requires special equipment)

Professional water heater flushing: $100-$200. Call BangBang HVAC at 929-708-8979.