We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Brass coupling one inch by three quarters pack joint to female thread

Legend Valve

Legend Valve 313-280NL 1 x 3/4 T4305 No Lead Pack Joint x FNPT Coupling

SKU CH-KJVG-ATJ2S

Connects 1-inch CTS tubing to a 3/4-inch female NPT thread using a no-lead bronze pack joint coupling

  • No-lead bronze protects drinking water
  • 1 in CTS pack joint connects to copper tube
  • 3/4 in FNPT threads accept standard pipe
  • T-4305NL alloy meets low-lead regulations
  • Legend Valve quality for plumbing systems

Lead-free bronze coupling for potable water systems

This Legend Valve 313-280NL coupling connects 1 inch CTS pack-joint tubing to 3/4 inch female NPT threads. The T-4305NL no-lead bronze body meets Proposition 65 requirements for drinking-water installations. It suits plumbers and DIYers joining copper tube size pipe to standard threaded fittings in residential or light-commercial supply lines.

Simple compression-to-thread assembly

Slide the pack-joint nut and gasket onto the prepared CTS tube, insert the tube fully into the body, and tighten the nut to compress the seal. Then thread the FNPT end onto the mating fitting with pipe sealant. The most common error is under-tightening the pack joint, which leaves a leak path; over-tightening can deform the gasket and also cause weeping.

Verify tube size and thread compatibility before

Confirm the existing tubing is 1 inch CTS outside diameter, not nominal pipe size, because the pack joint seals only on true CTS dimensions. Check that the mating port is 3/4 inch female NPT; other thread forms will not seal. Ensure the system pressure and temperature fall within standard bronze-coupling limits for the application.

Highlights

  • No-lead bronze protects drinking water
  • 1 in CTS pack joint connects to copper tube
  • 3/4 in FNPT threads accept standard pipe
  • T-4305NL alloy meets low-lead regulations
  • Legend Valve quality for plumbing systems

Specifications

BrandLEGEND VALVE

Questions about this item

How do I confirm the 1" x 3/4" T-4305NL no-lead bronze coupling is installed correctly?

Check that the pack joint seats fully on the CTS tubing and the FNPT threads engage smoothly with the mating fitting; pressure-test the joint for leaks before covering the work.

What comes with the Legend Valve 313-280NL coupling and what must I supply?

The coupling itself is supplied; you must provide compatible CTS tubing, a matching FNPT fitting, and any thread sealant or tools required for assembly.

Which Legend Valve no-lead bronze coupling should I select for a 1" CTS to 3/4" FNPT transition?

Choose the 313-280NL model, specified as 1" x 3/4" T-4305NL pack joint by FNPT, to match those exact connection sizes.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.