Question about Black & Decker Dewalt #D55155 2HP 4GAL Eleccompressor

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Dewalt D55155 air compressor regulator installation

I have the above air compressor & it is missing the regulator assy. I bought a repair kit which has the complete unit but it is dissassembled. There are no drawings or instructions with it, on DeWalts website, in the manual & the place I bought it from doesn't know either. Any help is appreciated.

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  • idsaw Feb 26, 2009

    Thank you for the response. I thought of adapting another regulator I had but decided to go with the original since it was only $25. After taking apart another brand regulator to see how it works, I was able to install the DeWalt with no problem. It works fine & should last me a long time.

  • Anonymous Apr 14, 2009

    my valve assembly broke apart in my hand. your comments are clear, concise, well explained and pragmatic. thanks for the posting.


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The d55155 unit suffers from regulator problems due to weakness in the design of the manifold. The manifold parts are very light duty metal and will break during installation if not carefull. If you can return the parts to dewalt it may be more efficient to to use a generic pressure regulator from for about 20 bucks and mount using a couple of 1/4" tees directly off the pressure switch. Remove the hose from the pressure switch that feeds air to the manafold . Install parts so that the quick disconnects, guages and new regulator are accessable from the side. It will not be pretty but problem will be solved for long term. We repair other brands that come with control panels using the same method. Pressure regulators built into a manafold will fail. For demanding customers we have recreated the manafold using 1/4 pipe fittings and refit the gauges and grainger regulator into panel.(lots of work) But leave the safety unloader at the pressure switch. If all you need is a good functioning compressor same time and money and mount to side. Good Luck and email if you have questions or other issues with your dewalt.

Posted on Feb 26, 2009

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