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The IRWIN IR1906ZR is a 3/4-inch NPT pipe tap designed for cutting internal pipe threads in metal pipe fittings and related components. NPT (National Pipe Taper) taps produce the tapered thread profile required for pressure-tight pipe joints used in plumbing, HVAC piping, and gas line work. This tap is sold individually and is intended for use by plumbers, pipefitters, HVAC technicians, and experienced tradespeople who need to chase, repair, or cut new NPT threads in the field or shop.
The IR1906ZR is suited for residential and commercial applications where 3/4-inch NPT threaded connections are required. Common use cases include threading pipe fittings, valve bodies, manifolds, and pipe unions. It is appropriate for use in pipe fabrication and repair scenarios across plumbing, hydronic heating, and gas distribution systems where a properly tapered thread seat is critical to a leak-free connection.
Designed for use in any application requiring 3/4-inch NPT internal pipe threads, compatible with standard pipe tapping handles and tap wrenches sized for this thread class.
Installation of this tap should be performed by a qualified plumber or pipefitter familiar with NPT thread cutting procedures. Always secure the workpiece firmly before tapping and use an appropriate cutting oil to extend tap life and produce clean threads. Follow applicable IPC and IFGC guidelines when threading components for gas or potable water service. Inspect finished threads before assembly to confirm proper engagement and a leak-free fit.
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