{"product_id":"parker-398pss-4-2-shutoff-pipe-coupler-1-8-27-compression-mnpt","title":"Parker 398PSS-4-2 Shutoff Pipe Coupler 1\/8-27 Compression Mnpt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe PARKER 398PSS-4-2 is a single end shutoff pipe coupler designed for compression-to-male NPT connections in fluid and gas line applications. Machined from 316 stainless steel, it delivers strong resistance to corrosion and is suited for demanding environments where material integrity matters. The coupler features a 1\/8-27 thread size with a Compression x MNPT end configuration. It is rated to 150 psi maximum working pressure and handles temperatures from 0 degrees F up to 65 degrees F (approximately 149 degrees F converted, however the input states 65 degrees C maximum). Licensed plumbers, HVAC technicians, and instrumentation professionals install this fitting in tubing systems that require a shutoff point at a single end of the connection.\u003c\/p\u003e\n\u003cp\u003eThis coupler is used in residential and light commercial applications where a reliable, leak-free shutoff is needed at a tube-to-pipe transition. The compression end accepts tubing directly without soldering or welding, making it well-suited for retrofit or service work. The MNPT end threads into standard pipe fittings or equipment ports. Typical install scenarios include instrument lines, control system tubing, and fluid handling panels where stainless steel is specified for cleanliness or corrosion resistance.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e316 stainless steel construction for corrosion resistance in wet or chemically active environments\u003c\/li\u003e\n  \u003cli\u003eSingle end shutoff function isolates flow at one end of the tubing run\u003c\/li\u003e\n  \u003cli\u003eCompression x MNPT configuration eliminates the need for soldering or brazing at the tube end\u003c\/li\u003e\n  \u003cli\u003e1\/8-27 thread size fits standard NPT pipe ports and fittings\u003c\/li\u003e\n  \u003cli\u003eRated to 150 psi maximum working pressure\u003c\/li\u003e\n  \u003cli\u003eOperating temperature range from 0 degrees F minimum to approximately 149 degrees F maximum\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or new-install compression shutoff coupler for tubing systems using standard 1\/8-27 MNPT pipe connections.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a licensed plumber or qualified instrumentation technician. Shut off and depressurize the system fully before removing or installing any compression fitting. Ensure tubing is cut cleanly and squarely and that the compression ferrule is seated correctly before tightening the compression nut. Follow applicable IPC or facility piping codes for pressure testing after installation.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFitting Type\u003c\/strong\u003e: Single End Shutoff Pipe Coupler\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: 316 Stainless Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEnd Connections\u003c\/strong\u003e: Compression x MNPT\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/8-27\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: MPT\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Working Pressure\u003c\/strong\u003e: 150 psi\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMinimum Temperature\u003c\/strong\u003e: 0 degrees F\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Temperature\u003c\/strong\u003e: 65 degrees C\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.1 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: PARKER\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 398PSS-4-2\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PARKER","offers":[{"title":"Default Title","offer_id":51541787410738,"sku":"398PSS-4-2","price":519.21,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/361cdbe3577415d21423b51764812ac0.jpg?v=1785884933","url":"https:\/\/voomisupply.com\/products\/parker-398pss-4-2-shutoff-pipe-coupler-1-8-27-compression-mnpt","provider":"Voomi Supply","version":"1.0","type":"link"}