Toggle Nav
Search
  • My Account
  • My Wish List ()
  • Sign In
  • Create an Account
Menu
Account
main product photo

Dewalt N034159 Compressor Check Valve

Be the first to review this product
Out of stock
SKU
N034159
Brand
DEWALT
DEWALT
$71.49

This Part Fits the Following Models (2)

0
Rating:
0% of 100
Reviews
Write Your Own Review
You're reviewing:Dewalt N034159 Compressor Check Valve
Customer Questions
Is the Dewalt N034159 Compressor Check Valve compatible with all Dewalt compressors?

No. This check valve is designed for specific Dewalt air compressor models such as selected D55146 series units. Compatibility should always be confirmed using the compressor's model number and parts diagram before replacement.

What happens when the Dewalt Check Valve fails?

A failed valve can cause air to leak backward into the pump, prevent proper tank pressurization, and create hard starting conditions due to trapped head pressure.

Can the Dewalt Compressor Check Valve be replaced at home?

Most users can replace it with basic tools such as a wrench set and screwdriver. The process typically involves disconnecting the outlet tube, removing the old valve, and installing the replacement with proper threading and sealing.

What is the function of the Dewalt N034159 Check Valve in an air compressor?

It allows compressed air to flow into the tank while blocking reverse airflow back into the pump. This separation protects the motor at startup and ensures efficient pressure buildup inside the tank.

The Dewalt N034159 Compressor Check Valve is a critical one-way air control component that directs compressed air into the tank while preventing backflow into the pump. When it begins to fail, compressor performance drops quickly.

Common symptoms this part helps resolve:

  • Compressor motor struggles to restart under pressure.
  • Air leaks back through pump head after shutdown.
  • Tank fails to hold pressure over time.
  • Continuous hissing near outlet tube or pump connection.
  • Pressure switch cycles irregularly or cuts off early.

Air Leaking Back Into Pump After Shutdown.

Quick Check: Turn off compressor and listen for air escaping from the pump head area.

Fix Suggestion: Replace the check valve if internal sealing surfaces are stuck open or contaminated with debris.

Prevention Tip: Keep air lines and tank moisture-free using regular draining to reduce internal corrosion.

Compressor Will Not Build Proper Tank Pressure.

Quick Check: Observe if air flow reaches the tank but pressure fails to rise.

Fix Suggestion: Inspect the valve for blockage or a failed internal seal allowing air to circulate backward instead of filling the tank.

Prevention Tip: Replace air filters regularly to prevent dust from entering the valve assembly.

Hard Starting or Motor Strain at Startup.

Quick Check: Listen for a heavy “locked” startup sound from the motor.

Fix Suggestion: A stuck check valve may leave trapped pressure on the pump side; replace the valve to restore proper unloader function.

Prevention Tip: Ensure unloader line is correctly connected so pressure is released after shutdown cycles.

Intermittent Pressure Cycling or Short Run Times.

Quick Check: Watch for compressor stopping too early without reaching full tank PSI.

Fix Suggestion: Replace a weak or leaking check valve that is triggering false pressure feedback to the switch system.

Prevention Tip: Inspect fittings for vibration loosening during routine compressor maintenance.

Customer Experience: After swapping in the N034159 valve, the compressor finally stopped leaking air back into the head.

Disclaimer: Troubleshooting guidance is for general reference only and may vary by condition; always verify the issue and follow the manufacturer's instruction manual, safety guidelines, and service procedures before repairs or part replacement.

We strive to provide our customers with a hassle-free and efficient shopping experience. Our shipping policy ensures the timely delivery of your orders and complete customer satisfaction. View More

We are committed to ensuring your complete satisfaction with every purchase. We understand that circumstances may arise where you must return a product or request a refund. If for any reason you are not satisfied, you may return the item(s) according to the terms outlined below. View More

This Payment Policy outlines the terms and conditions governing all payments made for products purchased through our website. By making a purchase, you agree to be bound by this Payment Policy. View More