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 dielectric union with female NPT and sweat ends

Legend Valve

Legend Valve 301-106NL 1-1/4" FNPT x Sweat T-571 No Lead Dielectric Union

SKU CH-WCN9-44CPQ

A no-lead dielectric union joining 1-1/4" FNPT to sweat pipe for corrosion-free plumbing connections

  • No-lead construction reduces heavy-metal exposure
  • Dielectric design prevents galvanic corrosion between metals
  • 1-1/4" FNPT-to-sweat fits standard copper piping
  • T-571 model rated for potable-water systems
  • California Prop 65 warning disclosed for compliance

1-1/4" Dielectric Union for Copper-to-Iron

This Legend Valve 301-106NL fitting joins 1-1/4-inch FNPT threads to a sweat connection, preventing galvanic corrosion between dissimilar metals. The no-lead construction meets potable-water safety requirements for residential and commercial plumbing systems. It is intended for installers who need a reliable dielectric barrier at copper-to-steel or copper-to-iron junctions.

T-571NL Union Installs Between Threaded Pipe

The female NPT end accepts standard 1-1/4-inch iron or steel pipe threads while the sweat end solders directly to copper tubing. No special tools beyond normal pipe wrenches and a torch are required, freeing the installer from sourcing separate dielectric nipples or flanges. The design maintains electrical isolation without adding significant length to the pipe run.

Replaces Separate Dielectric Nipple

Builders upgrading from a two-piece nipple-and-coupling setup gain a single-body union that reduces potential leak paths and installation time. The jump is worth it when codes require a dielectric fitting at the water heater, meter, or any copper-to-ferrous transition and a compact, no-lead component is specified. California Proposition 65 warnings apply.

Highlights

  • No-lead construction reduces heavy-metal exposure
  • Dielectric design prevents galvanic corrosion between metals
  • 1-1/4" FNPT-to-sweat fits standard copper piping
  • T-571 model rated for potable-water systems
  • California Prop 65 warning disclosed for compliance

Specifications

BrandLEGEND VALVE

Questions about this item

How long before the 1-1/4" FNPT x Sweat dielectric union shows wear under continuous plumbing use?

The Legend Valve 301-106NL is a new brass fitting with no lead construction; service life depends on water chemistry and installation quality rather than a published wear limit.

Does the T-571 no-lead dielectric union generate noise or heat when water flows all day?

As a passive copper-to-steel transition fitting it has no moving parts, so it produces no operational noise or heat beyond normal fluid temperature.

What pipe materials and tools must I already have to install this 1-1/4" dielectric union?

You need 1-1/4" female NPT threaded steel pipe on one side, 1-1/4" copper tube for the sweat end, plus pipe wrenches, flux, lead-free solder and a torch.

Also in this aisle

People compared these

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