2025 How to Flush Your Water Heater – Step-by-Step for Kent Homes

Flushing your water heater is one of the most important but often overlooked maintenance tasks for homeowners in Kent, WA. Regular flushing removes sediment buildup, improves efficiency, and helps extend the life of your water heater. Whether you have an electric or gas unit, this detailed, step-by-step guide from CPR Rooter will walk you through everything you need to know to properly flush your water heater in 2025.

Why Flushing Your Water Heater Matters in Kent, WA

Kent’s water supply contains moderate to hard minerals, which means sediment buildup happens faster than you might think. This sediment settles at the bottom of your water heater tank, forming a barrier between the burner (or element) and the water. This leads to several problems:
Replacing plumbing fixtures too often gets expensive fast. But with proper maintenance, you can avoid leaks, save water, and extend lifespan by years.

Reduced Efficiency: More energy is required to heat the water.
Strange Noises: Popping, rumbling, or cracking sounds are signs of sediment.
Shortened Lifespan: Heat stress damages the tank and components.
Discolored Water: Rusty or cloudy water may indicate internal corrosion.
Clogged Drain Valves: If not flushed regularly, the sediment may block the valve entirely.

By flushing your water heater once a year, you avoid these issues and ensure your system runs smoothly for years.

Tools & Supplies You’ll Need

Before you begin, gather the following items:

A garden hose (6-10 feet)
A flathead screwdriver (for gas units)
A bucket (optional, to check sediment discharge)
Gloves and towels (to catch minor leaks)
A safe drainage area (driveway, floor drain, or utility sink)

Step-by-Step Instructions to Flush Your Water Heater

NOTE: Always exercise caution. If you are unsure or notice major problems (like rust or heavy leakage), call CPR Rooter at (425) 647-5800.

Turn Off the Power or Gas Supply

This step prevents the heating elements from operating while the tank is empty.

Turn Off the Cold Water Supply

Find the cold water shut-off valve at the top of your tank and turn it clockwise until it stops. This prevents additional water from entering the tank during the flush.

Attach the Garden Hose to the Drain Valve

Open a Hot Water Faucet

To prevent a vacuum in your pipes, open the hot water faucet in your nearest sink or tub. This allows air into the system and helps water drain smoothly from the heater.

Open the Drain Valve

Slowly open the drain valve using a flathead screwdriver or turning the knob counterclockwise. Let the tank drain completely. The water may be discolored at first — this is normal and indicates sediment is being flushed out.
Let the water run until it appears clear.
Optional: Fill a bucket with the first gallon or two to check for sediment volume.

Turn On the Cold Water to Rinse

Once the tank is nearly empty, briefly turn on the cold water supply with the drain valve still open. This helps stir up and flush out any remaining sediment. Do this for 2-3 minutes.

Close the Drain Valve and Remove the Hose

Once you’re satisfied the water is running clear:

Refill the Tank

Turn the Power or Gas Back On

Give the unit time (30-60 minutes) to fully heat the water.

How Often Should You Flush Your Water Heater in Kent?

We recommend flushing your water heater once every 12 months for homes in Kent, WA. If you notice signs of sediment earlier (like noises or fluctuating temperatures), consider flushing every 6-9 months.
Homes with hard water may need more frequent maintenance. To reduce sediment entry, you can also install a whole-house filter.

Common Signs You Waited Too Long

These signs mean you may have major buildup or component damage. Call CPR Rooter right away.

Flush Sediment from Showerheads

If your tank hasn’t been flushed in years or the drain valve is blocked, do not force it. DIY attempts could cause more damage.
Instead, call the CPR Rooter team. We provide professional water heater flushing services in Kent, WA and surrounding cities.

We can:

Safely drain tanks with blocked or rusted valves
Replace old or corroded drain valves
Inspect anode rods and tank condition
Test heating element function (electric)
Ensure relighting and safe function (gas)

Call CPR Rooter for Professional Water Heater Flushing in Kent

Don’t let sediment shorten the life of your water heater or raise your energy bill. Flushing your water heater is simple, smart maintenance — and CPR Rooter is here to help you do it right.

Call us today at (425) 647-5800 or schedule your professional water heater flush in Kent, WA. Let’s keep your hot water flowing all year long.