{"product_id":"parker-391pss-6-4-compression-pipe-coupler-1-4-18-ss","title":"Parker 391PSS-6-4 Compression Pipe Coupler 1\/4-18 Ss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe PARKER 391PSS-6-4 is a compression tube pipe coupler body designed to connect compression tubing to a male NPT threaded pipe fitting. Machined from 316 stainless steel, this fitting provides corrosion resistance suited for demanding fluid and gas line applications. It features a compression end on one side and a male NPT (MNPT) end on the other, allowing a direct transition between compression tube and threaded pipe systems. Rated to a maximum working pressure of 150 psi, the 391PSS-6-4 is a reliable choice for plumbing, instrumentation, and process piping installations where stainless steel construction and leak-free compression connections are required.\u003c\/p\u003e\n\u003cp\u003eThis coupler body is suited for residential and commercial plumbing, HVAC, and light industrial applications where a compression-to-male NPT transition is needed. Common install scenarios include connecting copper or stainless tubing runs to threaded pipe manifolds, control valves, or instrumentation ports. The 1\/4-18 NPT thread size is standard in many plumbing and instrumentation assemblies. Licensed plumbers, pipefitters, and HVAC technicians working with refrigerant lines, pneumatic controls, or water supply systems will encounter this fitting type regularly.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e316 stainless steel construction provides strong corrosion resistance in wet and chemically active environments\u003c\/li\u003e\n  \u003cli\u003eCompression x MNPT end connections allow direct tube-to-threaded-pipe transitions without soldering or welding\u003c\/li\u003e\n  \u003cli\u003e1\/4-18 NPT thread size fits standard plumbing and instrumentation pipe threads\u003c\/li\u003e\n  \u003cli\u003eRated to 150 psi maximum working pressure\u003c\/li\u003e\n  \u003cli\u003eCompact, lightweight design at 0.06 pounds for easy handling in tight spaces\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style compression tube pipe coupler body for use in compression-to-male NPT fitting applications across plumbing, HVAC, and instrumentation piping systems.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a licensed plumber, pipefitter, or qualified HVAC technician. Shut off and depressurize the supply line before making any connections. Hand-tighten the compression nut first, then use an appropriate wrench to achieve a snug, leak-free seat without over-torquing the fitting body. Apply thread sealant or PTFE tape to the MNPT threads in accordance with local plumbing codes and the International Plumbing Code (IPC) where applicable.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFitting Type\u003c\/strong\u003e: Pipe Coupler Body\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\/4-18 inches NPT\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\u003eWeight\u003c\/strong\u003e: 0.06 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: 391PSS-6-4\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PARKER","offers":[{"title":"Default Title","offer_id":51538824397106,"sku":"391PSS-6-4","price":346.13,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/3acb5c8e272a599a8cd6f6dcde6284c8.jpg?v=1785827611","url":"https:\/\/voomisupply.com\/products\/parker-391pss-6-4-compression-pipe-coupler-1-4-18-ss","provider":"Voomi Supply","version":"1.0","type":"link"}