{"product_id":"castair-1x1-in-tank-check-valve-npt-female-fitting-inlet-npt-male-outlet","title":"Castair 1\"X1\" In Tank Check Valve NPT Female Fitting Inlet\/NPT Male Outlet","description":"\u003ch2\u003eCastair 1\"x1\" In-Tank Check Valve NPT Female Fitting Inlet \/ NPT Male Outlet CTB1010\u003c\/h2\u003e\n\n\u003cp\u003eThe Castair CTB1010 is a heavy-duty in-tank check valve with 1\" NPT female inlet and 1\" NPT male outlet. Rated to 500 PSIG and 400 degrees F with a 1\/8\" side port for unloader connection, this valve is the correct factory replacement for large-bore Castair compressor systems with 1\" tank connections. The NPT female inlet threads onto the compressor discharge; the NPT male outlet threads into the 1\" tank bung. At $50.82, it's a precision replacement that matches the configuration your compressor was built with.\u003c\/p\u003e\n\n\u003ch3\u003eWhat an In-Tank Check Valve Does\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOne-way flow:\u003c\/strong\u003e Allows compressed air to flow from the compressor into the tank during the compression stroke, prevents air from flowing back through the discharge when the compressor unloads or stops\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnloader port:\u003c\/strong\u003e The 1\/8\" side port connects to the pressure switch unloader line, allowing head pressure to bleed off at shutdown so the motor restarts unloaded\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTank protection:\u003c\/strong\u003e Holds compressed air in the tank when the compressor is off — without this valve, the tank back-bleeds through the compressor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFailure symptom:\u003c\/strong\u003e Short-cycling, frequent restarts, or slow tank pressure loss when the compressor is off are common signs of a failed check valve\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 CTB1010\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInlet Connection:\u003c\/strong\u003e 1\" NPT Female\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutlet Connection:\u003c\/strong\u003e 1\" NPT Male\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePressure Rating:\u003c\/strong\u003e 500 PSIG\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Rating:\u003c\/strong\u003e 400 degrees F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnloader Port:\u003c\/strong\u003e 1\/8\" side port\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrice:\u003c\/strong\u003e $50.82\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Castair (Spicer, Minnesota)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCastair CTB Series — Full NPT Female Inlet Lineup\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCTB3812\u003c\/strong\u003e — 3\/8\" x 1\/2\", $21.18\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCTB1212\u003c\/strong\u003e — 1\/2\" x 1\/2\", $20.33\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCTB1234\u003c\/strong\u003e — 1\/2\" x 3\/4\", $29.65\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCTB3434\u003c\/strong\u003e — 3\/4\" x 3\/4\", $31.34\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCTB1010\u003c\/strong\u003e — 1\" x 1\" (this listing), $50.82\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCTB114114\u003c\/strong\u003e — 1-1\/4\" x 1-1\/4\" (call for pricing)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCTB112112\u003c\/strong\u003e — 1-1\/2\" x 1-1\/2\" (call for pricing)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhen You Need CTB1010 vs. Smaller Sizes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCTB1010:\u003c\/strong\u003e Large reciprocating compressors, typically 7.5 HP and above, with 1\" NPT discharge ports and 1\" tank bungs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCTB3434:\u003c\/strong\u003e Mid-size commercial compressors, typically 3-7.5 HP, with 3\/4\" connections\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCTB1212 \/ CTB1234:\u003c\/strong\u003e Smaller commercial units, 1.5-5 HP, with 1\/2\" discharge connections\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCTB vs. CTD Series\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCTB (this series):\u003c\/strong\u003e NPT female inlet — threaded pipe connection on the discharge side\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCTD series:\u003c\/strong\u003e Compression tube fitting inlet — copper tubing inserts and is clamped with compression fitting, no threading\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy Buy From Air Compressor Factory Direct?\u003c\/h3\u003e\n\u003cp\u003eWe stock the full Castair check valve line. Call with your compressor model or thread sizes and we'll confirm whether CTB1010 is the right valve for your installation.\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 — fitment confirmation by phone before you order\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull manufacturer warranty\u003c\/strong\u003e on all Castair products\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":53342533157077,"sku":"CTB1010","price":93.72,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0622\/8466\/0949\/files\/InTankCheckValve.jpg?v=1772652637","url":"https:\/\/aircompressorfactorydirect.com\/products\/castair-1x1-in-tank-check-valve-npt-female-fitting-inlet-npt-male-outlet","provider":"Air Compressor Factory Direct","version":"1.0","type":"link"}