{"product_id":"castair-8p","title":"Castair 8P","description":"\u003ch2\u003eCastair 8P Replacement Foam Air Filter Element for Direct Drive Portable Compressors\u003c\/h2\u003e\n\n\u003cp\u003eThe Castair 8P is the OEM replacement foam air filter element designed specifically for Cast Air direct drive (DD) portable compressor pumps. If your direct drive portable compressor is running louder than usual, pulling in dirty air, or showing signs of restricted intake flow, this is the part you need. It is a straightforward, low-cost maintenance item that keeps your pump alive between rebuilds.\u003c\/p\u003e\n\n\u003ch3\u003eWhat This Filter Does\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntake air filtration:\u003c\/strong\u003e Captures dust, debris, and airborne particles before they enter the pump cylinder. Abrasive contamination is the primary cause of premature ring, valve, and cylinder wear on piston compressors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFoam element design:\u003c\/strong\u003e Foam elements are washable and serviceable. You can clean and re-oil them rather than replacing at every service interval, which lowers long-term maintenance cost.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect fit for DD portable pumps:\u003c\/strong\u003e Sized specifically for the intake port on Cast Air direct drive portable pump heads. No adapters, no fabrication — it seats and seals correctly out of the box.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 8P\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStyle:\u003c\/strong\u003e DD\/FOAM (Direct Drive, foam media)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInner Diameter:\u003c\/strong\u003e 1\/8\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOuter Diameter:\u003c\/strong\u003e 1-1\/4\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 1\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e Cast Air direct drive portable compressor pumps\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich Compressors Use This Filter?\u003c\/h3\u003e\n\u003cp\u003eThis element fits the direct drive (DD) portable pump series from Cast Air. Direct drive units mount the motor directly to the pump head — there is no belt, no belt guard, and the motor shaft connects straight to the crank. These are the compact, lighter-weight portable units common in contractor and light shop use. The DD portable top plate measures 6x7\", which is the distinguishing dimension if you are cross-referencing your compressor build.\u003c\/p\u003e\n\n\u003cp\u003eIf your compressor uses a belt drive setup — where the motor is offset and connected via V-belt — you need a different filter element. Belt drive (BD) portable pumps use a separate intake filter configuration. The 8P is specifically a DD\/foam element.\u003c\/p\u003e\n\n\u003ch3\u003eWhen to Replace This Filter\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eScheduled maintenance:\u003c\/strong\u003e Inspect at every oil change. Replace or clean annually under normal shop conditions, more frequently in dusty environments (construction sites, woodworking shops, sandblasting areas).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRestricted airflow symptoms:\u003c\/strong\u003e If the pump is running hot, cycling more frequently than normal, or taking longer to build pressure, a clogged intake filter is a common culprit to check before pulling the head.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVisible contamination:\u003c\/strong\u003e If the foam is saturated with oil, loaded with debris, or torn, replace it. A compromised filter is worse than no filter — it can break apart and send debris into the cylinder.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAfter shop or environmental events:\u003c\/strong\u003e If the compressor was stored in a dusty space, worked through drywall dust or grinding debris, or had the filter knocked loose, inspect and replace as needed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFoam Filter Maintenance Notes\u003c\/h3\u003e\n\u003cp\u003eFoam air filter elements can be cleaned and reused if they are not torn or saturated with oil. To service: remove the element, wash in warm soapy water, rinse thoroughly, allow to dry completely, then apply a light coating of clean compressor oil before reinstalling. Do not run the compressor with a wet foam element — water ingestion damages valve reeds. Allow full drying time before reinstalling.\u003c\/p\u003e\n\n\u003cp\u003eIf the foam shows any cracking, tearing, or has taken a hard set from oil saturation, replace it. The cost of a new element is negligible compared to the wear a compromised filter causes.\u003c\/p\u003e\n\n\u003ch3\u003eKeeping Your Cast Air Pump Running Long-Term\u003c\/h3\u003e\n\u003cp\u003eCast Air builds cast iron, oil-lubricated pumps designed for multi-decade service life when properly maintained. The intake filter is one of the three consumable wear items in the maintenance cycle — along with oil and head gaskets\/valves. Keeping a couple of spare 8P elements on the shelf means a filter change takes two minutes instead of a parts run. For any shop running a DD portable Cast Air unit, this is a standard restock item.\u003c\/p\u003e\n\n\u003cp\u003eThe 8P element is also worth having on hand when you put a pump back into service after storage. Filters deteriorate sitting on a shelf in a damp environment just as they do in service. A fresh element at startup costs almost nothing and removes one variable if the pump acts up during break-in.\u003c\/p\u003e\n\n\u003ch3\u003eWhy Buy From Air Compressor Factory Direct?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecialist supplier:\u003c\/strong\u003e We stock Cast Air OEM parts — not generic substitutes. The 8P element is the correct part for the correct pump, sourced from the manufacturer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFree shipping\u003c\/strong\u003e on qualifying orders\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFree technical support:\u003c\/strong\u003e Call 866-217-0063. If you are not sure whether this is the right filter for your pump, we can confirm your pump model and fitment before you order.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull manufacturer warranty\u003c\/strong\u003e on all parts\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHonest guidance:\u003c\/strong\u003e If you need the belt drive filter element or a different size, we will tell you. We would rather get you the right part than ship the wrong one.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eCall 866-217-0063 for quick answers and help!\u003c\/strong\u003e\u003c\/p\u003e","brand":"Cast Air","offers":[{"title":"Default Title","offer_id":53342511333589,"sku":"8P","price":11.36,"currency_code":"USD","in_stock":true}],"url":"https:\/\/aircompressorfactorydirect.com\/products\/castair-8p","provider":"Air Compressor Factory Direct","version":"1.0","type":"link"}