{"product_id":"castair-1-inlet-60-cfm-6-75o-d-x7-0o-a-ht-complete-air-filter-assembly-and-element-s-20dp-100","title":"Castair 1\" Inlet 60 CFM 6.75O.D.x7.0\"O.A.Ht. Complete Air Filter Assembly and Element S-20DP-100","description":"\u003ch2\u003eCastair S-20DP-100 Complete Air Filter Assembly — 1” Inlet, 60 CFM, Dual Foam Pre-Filter, Silencer Type\u003c\/h2\u003e\n\n\u003cp\u003eThe Castair S-20DP-100 is the factory intake filter assembly for high-output cast iron compressor pumps with a 1” NPT inlet rated at 60 CFM. This is a step up in both capacity and filtration design from the S-16D series. The \"DP\" designation indicates dual pre-filter construction — this assembly uses a foam pre-filter ahead of the primary element, which extends element service life in dusty shop environments. The body is 6.75” outer diameter by 7.0” overall height — taller than the S-16D series to accommodate the higher CFM and dual-stage filter media.\u003c\/p\u003e\n\n\u003cp\u003eAt 60 CFM rated throughput, this filter is sized for 10–15 HP cast iron pump configurations. Castair industrial-series 10 HP models produce 45 CFM at displacement and 35 CFM at 175 PSI. The S-20DP-100 handles that throughput with margin at the 1” NPT inlet size. Per Castair cross-reference, it is specified for the C4U pump model.\u003c\/p\u003e\n\n\u003ch3\u003eWhat the S-20DP-100 Does\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-stage filtration:\u003c\/strong\u003e The foam pre-filter captures large particulates before they reach the primary 20DP element. This extends element service intervals and provides better protection in high-dust environments — body shops, woodworking shops, fabrication environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSilencer construction:\u003c\/strong\u003e The \"S\" prefix means this assembly attenuates intake noise. At 60 CFM throughput on a slow-RPM industrial pump, intake noise reduction is noticeable.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete assembly:\u003c\/strong\u003e Ships ready to mount with the 20DP element and foam pre-filter already installed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e60 CFM rated capacity:\u003c\/strong\u003e Handles the full displacement of 10–15 HP Castair industrial pumps without creating inlet restriction. An undersized filter on a high-output pump limits performance and causes overheating.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e S-20DP-100\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Castair, Inc. (Spicer, MN)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInlet Connection:\u003c\/strong\u003e 1” NPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOuter Diameter:\u003c\/strong\u003e 6.75”\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Height:\u003c\/strong\u003e 7.0”\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlow Rating:\u003c\/strong\u003e 60 CFM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Silencer-type, dual pre-filter construction with foam pre-filter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplacement Element:\u003c\/strong\u003e 20DP (ID 3”, OD 4-3\/8”, Height 4-3\/4”) — includes foam pre-filter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Pump:\u003c\/strong\u003e C4U (per Castair cross-reference)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCompatible Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCastair C4U cast iron pump with 1” NPT inlet\u003c\/li\u003e\n\u003cli\u003eCastair industrial series compressors 10–15 HP with 1” NPT pump inlets displacing up to 60 CFM\u003c\/li\u003e\n\u003cli\u003eAny reciprocating compressor pump with a 1” NPT inlet displacing up to 60 CFM at operating pressure\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eReplacement Element: 20DP\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eElement Part Number:\u003c\/strong\u003e 20DP\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInner Diameter:\u003c\/strong\u003e 3”\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOuter Diameter:\u003c\/strong\u003e 4-3\/8”\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 4-3\/4”\u003c\/li\u003e\n\u003cli\u003eThe 20DP element is taller than the 16D and includes a foam pre-filter layer. Do not substitute a 16D element in an S-20DP body — it is shorter and will not seat correctly.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAvailable Configurations — Castair Air Filter Lineup\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eS-16D-100\u003c\/strong\u003e — 1” inlet, 6.75” OD x 4.5” height, 30 CFM (smaller body, lower CFM)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eS-20DP-100\u003c\/strong\u003e — 1” inlet, 6.75” OD x 7.0” height, 60 CFM (this unit — $71.61)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eS-20DP-125\u003c\/strong\u003e — 1-1\/4” inlet, 6.75” OD x 7.0” height, 60 CFM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eS-20DP-150\u003c\/strong\u003e — 1-1\/2” inlet, 6.75” OD x 7.0” height, 60 CFM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eS-32DP-200\u003c\/strong\u003e — 2” inlet, 7.5” OD x 7.5” height, 195 CFM\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhen Does a Shop Need the S-20DP-100 vs. Stepping Up or Down?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrder the S-20DP-100\u003c\/strong\u003e if your pump has a 1” NPT inlet and your compressor is 10–15 HP, displacing more than 30 CFM. The S-16D-100 also takes a 1” NPT inlet but is only rated at 30 CFM.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStep down to S-16D-100\u003c\/strong\u003e if your 1” inlet pump displaces only up to 30 CFM. You do not need the taller 20DP body.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStep up to S-20DP-125 or S-20DP-150\u003c\/strong\u003e if your pump inlet is 1-1\/4” or 1-1\/2” NPT at the same 60 CFM range. Same body, larger inlet thread.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStep up to S-32DP-200\u003c\/strong\u003e for 20–30 HP pumps with 2” inlets and up to 195 CFM displacement.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat’s in the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1x Castair S-20DP-100 complete air filter assembly (silencer type), 1” NPT inlet\u003c\/li\u003e\n\u003cli\u003e1x 20DP filter element with foam pre-filter (pre-installed)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy Buy From Air Compressor Factory Direct?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGenuine Castair OEM component\u003c\/strong\u003e — correct for the C4U pump per manufacturer specification\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 tech support at 866-217-0063\u003c\/strong\u003e — call if uncertain whether your pump takes S-16D-100 or S-20DP-100\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFull manufacturer warranty\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e20DP replacement elements stocked\u003c\/strong\u003e\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":53342597939413,"sku":"S-20DP-100","price":132.06,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0622\/8466\/0949\/files\/air-filter-kit_3bbe9367-41ef-417f-b5a3-304c4757fd2a.jpg?v=1772652883","url":"https:\/\/aircompressorfactorydirect.com\/products\/castair-1-inlet-60-cfm-6-75o-d-x7-0o-a-ht-complete-air-filter-assembly-and-element-s-20dp-100","provider":"Air Compressor Factory Direct","version":"1.0","type":"link"}