How to Replace a Dishwasher Spray Tower

Signs Your Spray Tower Needs Replacing

The spray tower is the vertical tube that rises from the bottom of the dishwasher to distribute water to the upper rack. It works with the spray arms to ensure every dish gets hit with water. When the tower cracks, clogs, or the internal bearing wears out, washing performance drops noticeably.

Look for these symptoms:

• Dishes on one side of the rack come out dirty while the other side is clean.
• Water pools in the bottom of the tub after a cycle.
• The tower does not rotate, or it makes a grinding noise.
• Visible cracks, broken clips, or a wobbly base.
• Spray nozzles are blocked with mineral deposits or food debris.

Tools and Safety

Before you begin, unplug the dishwasher or switch off the circuit breaker. Shut off the water supply valve under the sink to avoid any accidental spray. Have a towel ready to catch leftover water.

Most replacements only need a Phillips screwdriver, a pair of pliers, and a putty knife or flathead screwdriver for prying. A flashlight helps you see the mounting clips at the base.

Work in a well-lit area and keep small parts in a bowl so they do not roll away.

How to Remove the Old Spray Tower

Start by pulling out the lower rack to access the tower. The tower is usually centered at the bottom, rising up to the underside of the upper rack.

Follow these steps to remove it:

• Remove the lower rack and the upper rack if it blocks access.
• Locate the water supply tube that connects to the tower base. It may have a push-in fitting or a small clamp.
• Disconnect the tube by pressing the release ring and pulling upward, or by loosening the clamp with pliers.
• At the base of the tower, look for a locking collar or two mounting clips that hold the tower to the tub floor. Use a flathead screwdriver to gently pry the clips outward.
• Lift the entire tower assembly straight up and out of the dishwasher. Set it aside.
• Inspect the old tower for cracks and check the sealing gasket at the base. If the gasket is damaged, you may need to replace it along with the tower.

Choosing the Right Replacement

The replacement must match your dishwasher model. Check the model number on the stainless steel tag usually located on the side of the door or the front lower panel. Write it down before shopping for parts.

Genuine manufacturer parts often cost more but guarantee a precise fit and use the same plastic or steel materials. Aftermarket parts can work if they are designed for your specific model, but double-check the part number.

Spray towers are typically made of either plastic or stainless steel. Plastic towers are lighter and less expensive, while steel towers resist mineral buildup and last longer. Choose the material that matches your original part unless you are intentionally upgrading.

If your tower is cracked from impact or suffers from hard water scaling, replace it rather than trying to seal it. A temporary repair will not restore even water distribution.

Installing the New Spray Tower

Position the new tower over the opening in the tub floor. Slide it down until the base sits flush against the floor.

Secure the tower by reattaching the locking collar or pressing the clips back into place. You should hear or feel a click when they engage.

Reconnect the water supply tube to the base fitting. Press it firmly until it clicks, or tighten the clamp snugly with pliers.

Before reinstalling the racks, pour a small amount of water into the bottom of the tub to check for leaks under the tower. Run a rinse-only cycle to flush the new tower and confirm that it rotates freely.

Reinstall the racks and run a normal cycle with a load to verify that dishes come out clean. If you notice any spray pattern issues, check that the tower is fully seated and that the nozzles are clear.

Maintenance Tips to Extend Spray Tower Life

Regular cleaning prevents mineral deposits from clogging the small nozzles. Remove the tower every few months and soak it in warm vinegar if you have hard water. For thorough cleaning, follow the steps in our guide on cleaning spray arm holes.

Use a rinse aid to reduce spotting and mineral buildup inside the tower. The rinse aid helps water sheet off dishes and prevents scale from forming on the internal surfaces.

Avoid overloading the dishwasher so tall items do not knock the tower sideways. Check that the upper rack does not collide with the tower when it slides in.

If you are considering a dishwasher upgrade instead of a repair, our best 24-inch built-in dishwashers guide compares models with advanced spray systems and better coverage. For compact models, see our best 18-inch dishwashers guide.

What to pick for your use

Questions

How often should I replace a dishwasher spray tower?

There is no fixed interval. If you notice cracked plastic, mineral clogs that cannot be cleaned, or broken mounting clips, replace it. A well-maintained tower can last the life of the dishwasher.

Can I just clean the spray tower instead of replacing it?

Yes, if the tower is not physically damaged. Remove it and soak in white vinegar to dissolve mineral deposits. Poke out stuck debris with a toothpick. If the plastic is cracked or clips are broken, replacement is safer.

Will a spray tower from another brand fit my dishwasher?

No. Spray towers are model-specific. Check the model number and order the exact part. Universal parts rarely fit because mounting and water connections differ.

Should I hire a professional for this repair?

Most homeowners can do this in under an hour with basic tools. If you are uncomfortable disconnecting water lines or working under the tub, a repair technician is a good option. But the job is simpler than replacing a pump.

What if my new spray tower still doesn't spin?

Make sure the water supply tube is fully connected and the tower base is seated. Check that the spray nozzles are not blocked. Also confirm that your dishwasher has enough water pressure; if other cycles work, the tower may be faulty.