{"product_id":"castair-c-rs34","title":"Castair C-RS34","description":"\u003ch2\u003eCastair C-RS34 3\/4\" Standard Air Regulator with Gauge\u003c\/h2\u003e\n\n\u003cp\u003eThe Castair C-RS34 is a 3\/4\" NPT standard regulator built for commercial and industrial air compressor systems. If you're running a shop air system and need accurate, stable downstream pressure control at 3\/4\" line sizes, this is a straightforward, dependable regulator. It handles up to 250 PSI inlet pressure and flows up to 162 CFM — enough capacity for most shop air main lines at that pipe size. The included gauge gives you a clear read on downstream pressure so you can set it and trust it.\u003c\/p\u003e\n\n\u003ch3\u003eWhat This Regulator Does\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunction:\u003c\/strong\u003e Reduces and maintains downstream air pressure to the level required by air tools, paint equipment, or pneumatic devices\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePort Size:\u003c\/strong\u003e 3\/4\" NPT standard — fits directly into 3\/4\" threaded pipe connections on your main air distribution line\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Inlet Pressure:\u003c\/strong\u003e 250 PSI — compatible with all standard commercial air compressor systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlow Capacity:\u003c\/strong\u003e 162 CFM — handles high-demand shop environments with multiple tools running simultaneously\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGauge Included:\u003c\/strong\u003e Built-in pressure gauge for immediate downstream pressure visibility without a separate instrument\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhere This Fits in Your Air System\u003c\/h3\u003e\n\u003cp\u003eRegulators go downstream of your tank and dryer, upstream of your distribution drops or specific equipment. The C-RS34 is sized for 3\/4\" systems — shops running 3\/4\" main lines to paint booths, body work stations, or general air drops. At 162 CFM, it won't be a bottleneck for most reciprocating or mid-size rotary screw compressor setups at that line size.\u003c\/p\u003e\n\n\u003ch3\u003eCastair Regulator Lineup\u003c\/h3\u003e\n\u003cp\u003eCastair offers regulators in standard NPT sizes. Choose the size that matches your existing pipe:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eC-RE14\u003c\/strong\u003e — 1\/4\" Mini, 150 PSI max, 38 CFM (no gauge)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eC-RS12\u003c\/strong\u003e — 1\/2\" Standard, 250 PSI max, 104 CFM with gauge\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eC-RS34 (this unit)\u003c\/strong\u003e — 3\/4\" Standard, 250 PSI max, 162 CFM with gauge\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eC-RS10\u003c\/strong\u003e — 1\" Standard, 250 PSI max, 162 CFM with gauge\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRS114\u003c\/strong\u003e — 1-1\/4\" Standard, 250 PSI max, 400 CFM (no gauge)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRS112\u003c\/strong\u003e — 1-1\/2\" Standard, 250 PSI max, 500 CFM (no gauge)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eMatch port size to your existing line size. A 3\/4\" regulator on a 1\" line creates a restriction — size the regulator to your pipe.\u003c\/p\u003e\n\n\u003ch3\u003eWhen Does a Shop Need the C-RS34 vs. Stepping Up or Down?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUse the C-RS34\u003c\/strong\u003e if your main distribution line is 3\/4\" and you need pressure regulation with gauge visibility. Common in smaller shops, paint prep areas, or as a secondary regulator feeding specific equipment from a larger main.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStep down to C-RS12 (1\/2\")\u003c\/strong\u003e if you're plumbing a branch line to a single air tool or drop — 1\/2\" is better suited to lower-flow individual station drops.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStep up to C-RS10 (1\")\u003c\/strong\u003e if your main line is 1\" pipe. Don't run a 3\/4\" regulator on a 1\" line; it will restrict flow.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStep up to RS114 or RS112\u003c\/strong\u003e for large-volume systems with high-CFM rotary screw compressors pushing through large-diameter mains.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePairing With Other Castair 3\/4\" Components\u003c\/h3\u003e\n\u003cp\u003eFor a complete FRL (filter-regulator-lubricator) air treatment train, Castair makes matching 3\/4\" NPT components:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eC-FS34\u003c\/strong\u003e — 3\/4\" Particulate filter, 5-micron, 250 PSI max, 160 CFM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eC-CF34\u003c\/strong\u003e — 3\/4\" Coalescing filter, 0.01-micron (requires upstream particulate prefilter)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eC-FRS34\u003c\/strong\u003e — 3\/4\" Filter\/Regulator combination with gauge\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eC-LS34\u003c\/strong\u003e — 3\/4\" Lubricator, 250 PSI max, 160 CFM\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 C-RS34\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Castair (Spicer, Minnesota)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Standard Regulator with gauge\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePort Size:\u003c\/strong\u003e 3\/4\" NPT\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Inlet Pressure:\u003c\/strong\u003e 250 PSI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlow Capacity:\u003c\/strong\u003e 162 CFM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGauge:\u003c\/strong\u003e Included\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy Buy From Air Compressor Factory Direct?\u003c\/h3\u003e\n\u003cp\u003eWe carry the full Castair line — regulators, filters, check valves, copper tubing, and replacement parts. When you call us, you're talking to someone who knows these systems. We can tell you which size regulator fits your line, whether you need a filter ahead of it, and what flow rating matches your compressor output.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFree shipping\u003c\/strong\u003e on qualifying orders to the lower 48\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFree tech support\u003c\/strong\u003e — call before you buy if you're unsure which size fits\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull manufacturer warranty\u003c\/strong\u003e on all Castair products\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHonest sizing advice\u003c\/strong\u003e — we'll tell you if a different size is a better fit\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":53342526570709,"sku":"C-RS34","price":139.16,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0622\/8466\/0949\/files\/C-RS34.jpg?v=1772674988","url":"https:\/\/aircompressorfactorydirect.com\/products\/castair-c-rs34","provider":"Air Compressor Factory Direct","version":"1.0","type":"link"}