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Transparent copper reducing adapter with male threaded end

Legend Valve

Legend Valve 450-790 1-1/4" x 3/4" C x M Adapter bathware

SKU CH-ZSTP-KV6XJ

Reducing copper adapter connects 1-1/4" and 3/4" pipe sizes with C x MNPT ends

  • Size1-1/4 in × 3/4 in
  • Product colorTransparent
  • Product typePipes, Valves & Fittings
  • Connects 1-1/4" to 3/4" copper pipe with male NPT thread
  • Reducing C x MNPT design adapts dissimilar pipe sizes in one fitting
  • Transparent body allows quick visual inspection of flow and seal
  • Legend Valve brand supplies plumbing components for residential and commercial use
  • California Proposition 65 notice: contains a chemical known to cause cancer and reproductive harm

Adapter Dimensions and Threads

The Legend Valve 450-790 is a copper reducing adapter that connects a 1-1/4 inch sweat inlet to a 3/4 inch male NPT outlet. It suits plumbers and DIY installers joining different pipe sizes in water-supply lines.

Flow Capacity and Pressure Limits

The 1-1/4 inch to 3/4 inch reduction handles typical residential flow rates while the copper body withstands standard plumbing pressures. The step-down restricts volume compared to a full-bore fitting, so high-demand fixtures may see reduced pressure.

California Proposition 65 Notice

This product contains a chemical known to the State of California to cause cancer and birth defects or other reproductive harm. Installers should follow safe-handling practices and local codes when working with the adapter.

How it compares

Measured against everything we stock in Bath Accessories & Soap Dispensers, at today’s prices. Recalculated every night.

Price $20.99
Cheaper than about 70% of the 1,499 comparable items (median $39.99).

Specifications

Product
Brand nameLEGEND VALVE
Product colorTransparent
Product typePipes, Valves & Fittings
Size & build
Size1-1/4 in × 3/4 in

Questions about this item

Will this 1-1/4" x 3/4" copper reducing MNPT adapter connect to my existing copper pipe and male threaded fitting?

Yes, the adapter is a reducing C x MNPT type with 1-1/4" x 3/4" inside diameter and 1-3/8" x 3/4" outside diameter, made to join copper pipe to a male threaded connection.

How can I verify the adapter is seated correctly after soldering to the copper pipe and threading the male end?

Inspect the soldered cup joint for a full, even fillet around the circumference and pressure-test the assembly; no leaks at the sweat or threaded joint confirm it is working as intended.

Does the box include thread sealant or tape for the male NPT end, or must I buy those separately?

The package contains only the copper reducing adapter; pipe-thread sealant or Teflon tape for the male NPT connection must be purchased separately.

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