Easy
15-30 minutes
This is an OEM part supplied directly from manufacturer. This part is guaranteed to fit compressors listed below to provide a seal on the interconnecting tube and lines. This part is made out of high quality rubber with the following dimensions .362ID X.103W. It is recommended to replace to maximize the power of your compressor. This part is sold individually.
O-ring AC-0781
OEM part for: Porter Cable, DeWALT, DeVilbiss, Black and Decker
Part Number: AC-0781
$5.19
Usually ships in 7 - 12 business days
Leaves our warehouse within 7 - 12 business days
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Compatibility
This O-ring will fit the following 71 machines. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
Displaying 20 of 71 matching models.
71 total model matches. Try the above search to narrow your results.
This is the official OEM part for the following brands:
- Black and Decker
- Bostitch
- DeVilbiss
- DeWALT
- Porter Cable
This item works with the following types of products:
- Compressor
Customer Part Reviews ?
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quick and easy instructions included
quick and easy instructions included
Guest -
February 12, 2021
Verified Purchase
great service great parts
parts all exactly as described and the correct parts will buy from again
Guest -
September 28, 2020
Verified Purchase
Quick fix of slow air leak
The O-ring was the perfect fix for the slow air leak I had going from the compressor to the tank.
Guest -
October 14, 2019
Verified Purchase
Perfect fit
Perfect
Guest -
August 15, 2019
Verified Purchase
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Customer Repair Instructions ?
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part.
Compressor was leaking air from outlet tube
Michael - August 6, 2017
👍 2 of 2 people found this instruction helpful
Tool Type
Compressor
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Wrench Set, Torque screw driver for plastic cover
Parts Used
Unplugged compressor
Removed plastic cover
Removed outlet tube
Replaced outlet tube , and new compression fitting
Put cover back on and ran compressor to test fix
Compressor working great
Removed plastic cover
Removed outlet tube
Replaced outlet tube , and new compression fitting
Put cover back on and ran compressor to test fix
Compressor working great
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No pressure in tank and compressor running constantly
Robert - July 5, 2016
👍 1 of 1 people found this instruction helpful
Tool Type
Compressor
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Wrench Set
Parts Used
Remove three screws on the compressor cover and pry cover apart. Removed the feed pipe from the compressor to tank and replaced the compressor side o-ring which had disintegrated. I coated the compressor with Vaseline and reinstalled.
It took me about 15 or 20 minutes to get the plastic compressor cover off and 5 minutes to replace the o-ring.
It took me about 15 or 20 minutes to get the plastic compressor cover off and 5 minutes to replace the o-ring.
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outlet tube had a hole in it.
Eric - May 14, 2023
Tool Type
Compressor
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Wrench Set, 6\\
took the broken Outlet tube off then re-installed the new Outlet tube in reverse order of taking it off...
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Inlet tube was cracked
Joe - March 3, 2023
Tool Type
Compressor
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Wrench Set, Adjustable Wrench
Removed plastic casing took off brass nuts installed new tube note of caution I planned on reusing the existing brass nut, o ring and compression nut the brass nut and o ring can be reised but you will have to get a new compression nut with collar once tightened it can't be reused and these fittings do not come with the new inlet tube.
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Pressure switch went bad caused it to not shutoff.
Kevin - November 17, 2022
Tool Type
Compressor
Difficulty
Easy
Time
30-60 minutes
Tools Used
Socket set, Wrench Set, Torx bits
Took off shroud around the electric motor and compressor. Removed the pressure switch and outlet tube. Reinstalled with the new parts. Then replaced shroud.
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The outlet tube was busted, cracked
Robert - June 5, 2022
Tool Type
Compressor
Difficulty
Medium
Time
30-60 minutes
Tools Used
Screwdriver, Socket set, Wrench Set
Had to remove the top plate which holds the manifold, the part that has the gauges and hose outlets on it. Then I had to remove the outlet tube using a 14 mm wrench. I had to put on the o-ring and nuts making sure they go in the right direction, the compression fitting has to go on a certain way. I then tightened the tube down. Replaced manifold and replaced the top plate. I did some other things like checked the regulator. Made sure the cutoff was working right.
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Broken outlet air tube
joe - May 27, 2022
Tool Type
Compressor
Difficulty
Medium
Time
1-2 hours
Tools Used
Screwdriver, Wrench Set, Torx driver
Remove both Wheels to gain access to the shroud around the compressor once both shroud halfs are off the air outlet tube nuts are visible loosen nuts remove tube take notice where the o-ring is located.
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compressor would not compress air into the tank
Ernie - October 25, 2021
Tool Type
Compressor
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, Socket set, Nutdriver, Adjustable Wrench, Torque Wrench
Removed plastic cover over the compressor motor
Loosened nut holding the Connecting Rod and Piston Assembly and removed assembly.
Removed Valve Plate Assembly and inspected parts for damage.
Installed in reverse order Connecting Rod and Piston Assembly.
Torqued the nut holding the Connecting Rod and Piston Assembly.
Replaced all O-rings and bolted Valve Plate Assembly back together.
Torqued all 4 nuts holding the Valve Plate Assembly
Replaced plastic cover over the compressor motor and tightened all screws.
Done
The compressor works great again :)
Loosened nut holding the Connecting Rod and Piston Assembly and removed assembly.
Removed Valve Plate Assembly and inspected parts for damage.
Installed in reverse order Connecting Rod and Piston Assembly.
Torqued the nut holding the Connecting Rod and Piston Assembly.
Replaced all O-rings and bolted Valve Plate Assembly back together.
Torqued all 4 nuts holding the Valve Plate Assembly
Replaced plastic cover over the compressor motor and tightened all screws.
Done
The compressor works great again :)
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would not build pressure, bad o-ring and bent tube
JIM - September 16, 2020
Tool Type
Compressor
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Adjustable Wrench
Removed the tube assembly, extracted damaged o-ring from exhaust port. Installed o-ring onto the tube, installed both the hex and compression nuts; tightened evenly. The tested operation. Completed repair.
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Had hole in tube
Tom - April 18, 2020
Tool Type
Compressor
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Pliers, N/A
Parts Used
Replaced tube, o-ring and compression nut. Works like new again!
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Learn MoreOur product descriptions are a combination of data sourced directly from the manufacturers who made your product as well as content researched and curated by our content & customer service teams. This content is edited and reviewed internally before being made public to customers.
Our customer service team are at the ready daily to answer your part and product questions. We have a dedicated staff with decades of collective experience in helping customers just like you purchase parts to repair their products.
All our part reviews are solicited directly from other customers who have purchased this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
Based on data from past customer purchasing behaviors, these parts are most commonly purchased together along with the part you are viewing. These parts may be necessary or helpful to replace to complete your current repair.
All our installation videos are created and produced in collaboration with our in-house repair technician, Mark Sodja, who has helped millions of eReplacementParts customers over the last 13 years repair their products. Mark has years of experience in selling and repairing both commercial and residential products with a specialty in gas-powered equipment.
This data is collected from customers who submitted a repair instruction after replacing this exact part. Customers can rate how easy the repair was to complete and how long it took. We aggregate this data to provide a repair rating that allows customers to quickly determine the difficulty and time needed to perform their own repair.
