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Universal Filter Strap Wrench for Oil, Fuel a...: 
Copper Sealing Washer Assortment Kit, M5 to M...: CompAir A11381974 is the oil filter that cleans the compressor oil before it returns to the airend. It is used on CompAir rotary screw air compressors. This aftermarket version is made to the same mounting and connections as the original, so it fits where the old one came off.
Sold as one unit. Check the number on your old part, or in the parts manual for your machine, before ordering.
| Part Type | Oil Filter |
| Replaces | CompAir A11381974 |
| Function | Filters the compressor oil before it returns to the airend |
| Supplied as | Single oil filter |
| Condition | New, aftermarket |
| Stat. HS-Code | 842123 |
| Country of Manufacture | China |
| CompAir Part No.(SPM Part No.) |
|---|
| A11381974(SPM-ACP-3924) |
Rising oil temperature or pressure drop
A blocked oil filter restricts oil flow to the airend and bearings. Change it at the service interval or when the filter warning comes on.
Protecting bearings and rotors
The oil filter catches wear metal and dirt before the oil goes back to the bearings. A cheap filter change protects the most expensive part of the compressor.
Oil change
Change the oil filter every time the compressor oil is changed, so the new oil is not contaminated by the old filter.
Fitting tips
Isolate and vent the compressor, catch the oil, lightly oil the new filter's seal, and tighten by hand to the maker's figure. Run the compressor and check for leaks.
We check what other aftermarket sellers charge for this same part. Their prices on the date we checked:
| Seller | Price | Checked |
|---|---|---|
| eBay (2 aftermarket sellers) | USD 109.11 to 178.99 | 25 Oct 2026 |
| Air Compressor Services | USD 116.00 | 22 Oct 2026 |
| The Air Market | USD 160.42 | 22 Oct 2026 |
| Moisture Boss | USD 161.07 | 22 Oct 2026 |
| Spare Part Mart | USD 92.80 | Today |
Our price of USD 92.80 is 15% to 48% less than these sellers.
Found this part cheaper somewhere else? Send us the listing and we will beat it by 5% under our Price Beat Guarantee. Every order is also covered by our 30 day money back guarantee.
No. It is an aftermarket part made to fit in place of CompAir A11381974. It is not made by or affiliated with CompAir; the CompAir part number is used only to show what it replaces.
It fits machines that take CompAir A11381974. Machines change parts between serial number ranges, so check the number on your old part or in your parts manual.
It is made to the same mounting and connections as the original part. Fit new gaskets and seals where they are used, and check for leaks and correct operation before putting the machine back to work.
Yes, we ship worldwide. Shipping is calculated at checkout, and every order is covered by our 30 day money back guarantee and price beat guarantee.
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