How to Replace Whirlpool Dishwasher Spray Arm Tube WPW10340745

Clean plates below and food-covered dishes above suggest that wash water is not reaching every rack equally. The Whirlpool dishwasher spray arm tube WPW10340745 carries water up the rear wall to the upper arms. Could a split in that path be letting pressure escape before the water reaches them?

Blocked arm holes or a tall dish that stops an arm can create a similar result. Checking those causes helps avoid choosing a tube too soon. Below, you will find the damage signs, model fit checks, and replacement steps, along with advice on when the tube, a spray arm, or both need attention.

Quick Facts

Use these details to plan the work:

• Difficulty: Easy
• Time: 15 to 25 minutes
• Tools: Driver suited to the fasteners, flat screwdriver, flashlight, and towel
• Part cost: $15 to $40
• Skill level: Beginner

What Symptoms Mean the Whirlpool Dishwasher Spray Arm Tube Is Cracked or Clogged?

A split tube can leave the top rack dirty while the lower rack washes well. A clog can limit the same flow, but these symptoms alone do not prove the tube has failed.

Use the pattern to narrow the cause before buying a part.

Is WPW10340745 the Right Spray Arm Tube for My Whirlpool Dishwasher?

The Whirlpool dishwasher spray arm tube WPW10340745 is a rear-wall water feed part. Its shape, joints, and mounting clips must match your dishwasher.

Confirm these details before ordering.

• Full model number: Use the label on the door edge, including its final letters and digits.
• Water path: Match the tube from the sump to the upper and top spray arms.
• Mounting points: Compare the lower joints, middle bracket, and upper clips.
• Older number: W10340745 may appear in the parts history before the WP prefix.

Which Whirlpool Dishwasher Models Use Spray Arm Tube WPW10340745?

These families are places to begin a model lookup, rather than a promise that every unit uses this tube.

• Whirlpool WDF
• Whirlpool WDT
• KitchenAid KDFE and KDTE
• Maytag MDB

What Tools Do I Need to Replace the WPW10340745 Tube?

The work uses common hand tools. The exact driver depends on the fasteners and clips on your model.

Gather these items before clearing the tub.

• Flat screwdriver
• Torx T20 driver or Phillips screwdriver, if needed
• Flashlight
• Towel
• Wire or toothpick for a gentle clog check

How to Replace Whirlpool Dishwasher Spray Arm Tube WPW10340745 Step by Step

Follow these steps to replace the tube with power and water shut off.

Phase 1: Cut Power and Remove Both Racks and the Lower Spray Arm

1. Extend the upper rack without bending its sides.
2. Note both gray stopper positions.
3. Pry each square notch and release its stopper.
4. Remove the rack onto a towel, rollers raised.
5. Remove the lower rack with wheels aligned.
6. Turn the spray-arm nut counterclockwise one-quarter turn; lift.
7. Note filter orientation; release its two screen notches.

Phase 2: Unclip the Old Tube From the Rear Wall and Sump

1. Release both upper tabs with the flat screwdriver.
2. Move the tube left without bending it.
3. Release the middle bracket gently.
4. Tilt downward and release both lower brackets.
5. Locate the old tube’s white bracket.
6. Slide that bracket off.
7. Press it lengthwise onto the replacement tube.

Phase 3: Seat the New Tube at the Sump and Snap It Into the Wall Clips

1. Match the tube’s original orientation.
2. Snap its bottom clips into the base.
3. Pivot upward and click in the middle bracket.
4. Seat the top and engage both locking tabs.

Phase 4: Reinstall the Spray Arms and Racks and Run a Test Cycle

1. Reseat the filter and engage all four clips.
2. Refit the arm; tighten clockwise one-quarter turn.
3. Return the lower rack with wheels aligned.
4. Return the upper rack without bending its sides.
5. Refit both stoppers, engaging their four tabs.
6. Restore electrical power.
7. Open the water valve fully counterclockwise.
8. Run an empty test for leaks and spray.
9. Wash a load and check upper-rack cleaning.

Should You Replace the Tube, the Upper Spray Arm, or Both?

Use these choices to keep the repair focused.

• Tube, $15 to $40: Choose it for a split wall, broken mounting clips, or a joint that cannot stay seated.
• Upper spray arm, $20 to $45: Choose it for a cracked hub or damaged arm after blocked holes have been ruled out.
• Both parts: Consider both when each has clear damage or the arm remains faulty after the feed path is sound.

FAQ

How Long Does It Take to Replace a Whirlpool Dishwasher Spray Arm Tube?

Allow about 15 to 25 minutes for an accessible tube. Brittle clips or a rack that takes extra care can make the job slower.

Can I Clear a Clog Instead of Replacing the Tube?

Yes, a sound tube with loose debris may be worth cleaning. A split wall or broken clip will still leak or come loose after the blockage is gone.

Why Is the Top Rack Still Dirty After a New Tube?

A blocked arm, poor loading, or weak pump can cause the same complaint. The new tube repairs its own water path; it cannot fix a separate damaged arm or pump.

Clean Dishes on Every Rack

The Whirlpool dishwasher spray arm tube WPW10340745 repairs a confirmed break in the upper water path. A sound tube should feed the upper arms without losing water through a crack.

Find the replacement spray arm feed tube for your full Whirlpool model number so the top rack can come out clean again.