{"product_id":"39pcs-pneumatic-fittings-kit-pu-pe-pza-py-pv-12-quick-release-4mm","title":"39pcs Pneumatic Fittings Kit – PU\/PE\/PZA\/PY\/PV-12 Quick Release Connectors for 4mm Plastic Hose","description":"\u003ch2\u003e39pcs Pneumatic Fittings Kit – PU \/ PE \/ PZA \/ PY \/ PV-12 Quick Release Connectors for 4mm Hose\u003c\/h2\u003e\n\n\u003cp\u003eA comprehensive assortment of 39 push-in pneumatic fittings covering the five most commonly needed configurations for 4mm OD tubing circuits. This kit eliminates the need to order individual fitting types separately — providing straight connectors, equal tees, reducing tees, Y-branches, and elbow fittings in a single organized box. Suitable for compressed air, water, and light fluid distribution in pneumatic automation, laboratory, and hobby applications.\u003c\/p\u003e\n\n\u003ch3\u003eFitting Types Included \u0026amp; Naming Convention\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePU-12 (Straight Union):\u003c\/strong\u003e Inline connector joining two tubes of the same diameter end-to-end. Used for extending tube runs or repairing cut tubing.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePE-12 (Equal Tee):\u003c\/strong\u003e 3-way tee with all three ports the same diameter. Used for branching a single supply line into two equal branches.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePZA-12 (Reducing Union):\u003c\/strong\u003e Straight connector joining two tubes of different diameters. Eliminates the need for a separate reducer fitting.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePY-12 (Y-Branch):\u003c\/strong\u003e Y-shaped 3-way fitting. Similar to a tee but with angled branch ports — reduces flow turbulence at the branch point compared to a 90° tee.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePV-12 (Elbow \/ 90° Union):\u003c\/strong\u003e 90° elbow connector for changing tube direction without bending the tube. Prevents kinking in tight routing paths.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eThe “-12” suffix in these part numbers indicates 4mm tubing OD (not 12mm). This is a manufacturer-specific coding convention — verify tubing OD before ordering.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTubing OD:\u003c\/strong\u003e 4mm (all fittings in this kit)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBody Material:\u003c\/strong\u003e POM (acetal) or PA66 nylon\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWorking Pressure:\u003c\/strong\u003e 0–1.0 MPa (0–145 PSI)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e 0°C to +60°C\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMedia:\u003c\/strong\u003e Compressed air, water, light non-corrosive fluids\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTotal Quantity:\u003c\/strong\u003e 39 pieces in assorted types\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat Questions Does This Product Answer?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cem\u003e\"What does the ‘-12’ suffix mean in PU-12, PE-12 etc.?\"\u003c\/em\u003e — In this manufacturer’s coding, “-12” refers to 4mm tubing OD, not 12mm. This is a non-standard internal code. Always verify the actual tubing OD compatibility in the product description before ordering.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cem\u003e\"When should I use a PY Y-branch instead of a PE tee?\"\u003c\/em\u003e — Use a Y-branch (PY) when flow direction matters — the angled ports reduce turbulence and pressure drop at the branch point compared to a 90° tee. For low-flow pneumatic circuits, the difference is negligible; for higher-flow or fluid circuits, Y-branches improve flow efficiency.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cem\u003e\"Can I use these fittings for vacuum circuits?\"\u003c\/em\u003e — Yes. Push-in fittings with O-ring seals are suitable for vacuum applications down to approximately -0.09 MPa (-90 kPa \/ 26 inHg). Ensure all tube ends are cut square and fully inserted for a leak-free vacuum seal.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cem\u003e\"What is the difference between a PZA reducing union and a PEG reducing tee?\"\u003c\/em\u003e — PZA is a straight 2-port reducer (inline size change). PEG is a 3-port reducing tee (two large ports + one small branch). Use PZA to change tube size in a straight run; use PEG to branch off a smaller line from a larger main line.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTypical Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLaboratory \u0026amp; analytical:\u003c\/strong\u003e Gas distribution panels, instrument air supply, chromatography carrier gas circuits\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAquariums \u0026amp; hydroponics:\u003c\/strong\u003e Air pump distribution, CO₂ line routing, nutrient solution micro-circuits\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e3D printing:\u003c\/strong\u003e Bowden tube routing, multi-zone part cooling, enclosure air circulation\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePneumatic automation:\u003c\/strong\u003e Compact cylinder supply circuits, vacuum generator distribution, sensor air purge lines\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHobby \u0026amp; DIY:\u003c\/strong\u003e Airbrush supply lines, model railroad pneumatics, custom fluid circuits\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePackage Contents\u003c\/h3\u003e\n\u003cp\u003e39 pieces total — PU-12, PE-12, PZA-12, PY-12, PV-12 push-in fittings for 4mm OD tubing, supplied in organized storage box.\u003c\/p\u003e","brand":"Cable Parts Online","offers":[{"title":"C kit (39pcs) \/ 1 BOX","offer_id":47850778427637,"sku":"14:201441572#C kit (39pcs);183:202360806#1 BOX","price":107.24,"currency_code":"USD","in_stock":true},{"title":"C kit (39pcs) \/ 5 BOXES","offer_id":47850778394869,"sku":"14:201441572#C kit (39pcs);183:202360807#5 BOXES","price":455.63,"currency_code":"USD","in_stock":true},{"title":"C kit (39pcs) \/ 10 BOXES","offer_id":47850778558709,"sku":"14:201441572#C kit (39pcs);183:202360808#10 BOXES","price":820.02,"currency_code":"USD","in_stock":true},{"title":"C kit (39pcs) \/ 20 BOXES","offer_id":47850778525941,"sku":"14:201441572#C kit (39pcs);183:202360809#20 BOXES","price":1557.99,"currency_code":"USD","in_stock":true},{"title":"difference \/ 1 BOX","offer_id":47850778624245,"sku":"14:10#difference;183:202360806#1 BOX","price":318.29,"currency_code":"USD","in_stock":true},{"title":"difference \/ 5 BOXES","offer_id":47850778591477,"sku":"14:10#difference;183:202360807#5 BOXES","price":436.52,"currency_code":"USD","in_stock":true},{"title":"difference \/ 10 BOXES","offer_id":47850778493173,"sku":"14:10#difference;183:202360808#10 BOXES","price":436.52,"currency_code":"USD","in_stock":true},{"title":"difference \/ 20 BOXES","offer_id":47850778460405,"sku":"14:10#difference;183:202360809#20 BOXES","price":43.61,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0732\/3494\/0149\/files\/Sf67298790f5343dab96783b1682dced1f.webp?v=1773899673","url":"https:\/\/www.csldmcml.com\/products\/39pcs-pneumatic-fittings-kit-pu-pe-pza-py-pv-12-quick-release-4mm","provider":"Cable Parts Online","version":"1.0","type":"link"}