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
4 inch galvanized merchant coupling with threaded ends

Legend Valve

Legend Valve 352-712 4" Galvanized Merchant Coupling

SKU CH-HX92-PGBJY

Connects 4-inch galvanized pipes with NPT threads for secure plumbing joints

  • Size4 in (10.2 cm)
  • Product colorTransparent
  • Product typePipes, Valves & Fittings
  • 4" galvanized coupling joins large-diameter pipes securely
  • NPT threading ensures a leak-resistant seal on each end
  • Galvanized coating protects the fitting from corrosion
  • California Proposition 65 warning notes regulated chemical content
  • Model 352-712 identifies the exact fitting for reordering

4-inch Galvanized Merchant Coupling

This 4-inch galvanized merchant coupling from Legend Valve joins two threaded pipe sections in plumbing installations. The coupling features standard NPT threading for compatibility with matching pipe sizes. It is supplied new and intended for use in water or gas distribution systems where a straight connection is required.

Installers needing a straight 4-inch NPT joint

Plumbers and maintenance technicians who need a durable galvanized fitting for connecting two male-threaded pipes will find this coupling suitable. Buyers who require a reducing coupling, a different thread standard, or a non-galvanized material should look at alternative fittings that match those specifications.

Galvanized steel resists corrosion under

The galvanized coating protects the steel body from rust during prolonged contact with water or humidity in buried or exposed pipe runs. The coupling maintains its structural integrity under sustained system pressure without deformation. California Proposition 65 warnings apply due to chemicals present in the galvanizing process.

How it compares

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

Price $95.99
Pricier than about 72% of the 1,499 comparable items (median $39.99).

Specifications

Product
Brand nameLEGEND VALVE
Product colorTransparent
Product typePipes, Valves & Fittings
Size & build
Size4 in (10.2 cm)

Questions about this item

What size NPT threads must my existing pipes have to connect with the 4" galvanized merchant coupling?

Both ends of the coupling use 4-inch NPT threads, so the pipes you are joining must also be 4-inch NPT male threads.

Can I thread this galvanized coupling onto older black-iron pipe that is already in the wall?

Yes — the coupling follows the same NPT standard used on black-iron pipe, so it will thread on directly if the existing pipe is 4-inch NPT.

After installation, how can I confirm the coupling is sealed and functioning correctly?

Pressurise the line and check every joint for leaks; a properly sealed coupling will hold pressure with no water escaping at the threads.

More in Bath Accessories & Soap Dispensers

Similar items