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Copper reducing male adapter with threaded end

Legend Valve

Legend Valve 450-788 Copper Reducing MNPT Adapter

SKU CH-QECC-XDMC1

A copper reducing adapter joining 1" and 1-1/4" connections with a male NPT thread

  • Size1 in × 1-1/4 in
  • Product colorTransparent
  • Product typePipes, Valves & Fittings
  • Copper construction resists corrosion for long service life
  • Reducing design connects 1 in. to 1-1/4 in. piping
  • Male NPT threads ensure secure, leak-resistant joints
  • California Prop 65 warning discloses regulated chemical content
  • New condition guarantees factory-original performance and reliability

Copper Reducing MNPT Adapter

The Legend Valve 450-788 adapter joins a 1 inch copper pipe to a 1-1/4 inch male NPT thread. It suits plumbers and DIYers who need a straight reducing connection in water supply lines. The copper body resists corrosion in typical residential plumbing installations.

Step Up from Straight Couplings

A straight coupling cannot bridge different pipe and thread sizes without extra fittings. This single adapter replaces a reducer plus a separate threaded fitting, cutting joint count and potential leak paths. The jump is worth it when transitioning directly from copper tube to threaded iron or brass components.

Handles Standard Water Pressure

The fitting handles normal household water pressure and temperatures found in hot and cold distribution systems. It runs out when the system demands a larger flow capacity than the 1 inch inlet can deliver or when the thread standard differs from MNPT. California Proposition 65 warnings apply to chemicals in the product.

How it compares

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

Price $14.99
Cheaper than about 80% of the 1,499 comparable items (median $39.99).

Specifications

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

Questions about this item

What pipe diameters does the 1" x 1-1/4" copper reducing adapter connect?

It joins a 1" copper tube on the sweat end to a 1-1/4" male NPT thread on the other end.

Which joint should be made first when installing this Legend Valve fitting?

Solder the copper socket to the pipe before threading the MNPT end into the mating fitting to avoid heat damage to thread sealant.

How often should the threaded connection on this adapter be inspected or re-sealed?

Check the MNPT joint annually for leaks and reapply thread sealant if any seepage appears; the copper sweat joint is permanent.

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