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

Legend Valve

Legend Valve 101-157NL 1" FNPT Union x Sweat NL Tankless Water Heater Valve Kit

SKU CH-ASSK-31NRN

1" FNPT union by sweat connection kit for tankless water heaters, lead-free brass without pressure reducing valve

  • 1" FNPT union connects tankless heater to piping
  • Lead-free brass meets Prop 65 safety requirements
  • Sweat inlet enables direct copper pipe soldering
  • Union design allows quick service without cutting pipe
  • Kit excludes pressure reducing valve for custom setup

Tankless Water Heater Valve Kit

The Legend Valve 101-157NL kit provides a 1-inch FNPT union and sweat connection for tankless water heater installations. It is supplied new and ships directly from the manufacturer. The valve body is constructed without a pressure reducing valve.

Plumbing installers needing union and sweat ends

This kit suits professionals who require a direct sweat connection combined with an FNPT union for a tankless unit. It is not intended for systems that need an integrated pressure reducing valve. Buyers who want a pressure reducing function should look at a different configuration.

California Proposition 65 notices included

The package includes documentation warning that the product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. These notices inform safe handling and compliance but do not add installation hardware or change the valve function.

Highlights

  • 1" FNPT union connects tankless heater to piping
  • Lead-free brass meets Prop 65 safety requirements
  • Sweat inlet enables direct copper pipe soldering
  • Union design allows quick service without cutting pipe
  • Kit excludes pressure reducing valve for custom setup

Specifications

BrandLEGEND VALVE

Questions about this item

What pipe fittings must I already have to connect the 1" FNPT union and sweat ends of the 101-157NL valve kit?

You need a 1" female NPT threaded pipe for the union side and a 1" copper tube ready for sweat soldering on the other side, plus flux, solder and a torch for the sweat joint.

Can I keep my existing 1" copper supply lines and threaded fittings when installing this tankless valve kit?

Yes, the sweat end solders directly to 1" copper tubing and the FNPT union threads onto standard 1" male NPT fittings, so existing lines and fittings of those sizes remain compatible.

How do I verify the 101-157NL kit is operating correctly after installation?

Pressurise the system, check both the sweat joint and the FNPT union for leaks, then operate the tankless heater and confirm water flows through the valve without restriction or drips.

Also in this aisle

People compared these

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