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Nickel-plated brass axial valve, 3/4 inch FNPT ports, 33 mm hex, 4.92 in long, 2.76 in high

Legris

Legris 4203 20 28 20 Axial Valve FNPT 3/4" x 3/4" trap

SKU CH-FDAW-GR5DY MPN 4203

Nickel-plated brass axial valve with FNPT 3/4" connections, normally closed operation, FKM seals, 150 psi maximum pressure, and -4 °F to 275 °F temperature range

  • Product typeDrain Components
  • Main materialHAWA
  • Axial valve with 3/4" FNPT connections for direct pipe fit
  • Normally closed design opens at 60 psi pilot pressure for reliable actuation
  • Nickel-plated brass body resists corrosion up to 150 psi operating pressure
  • FKM seals handle -4 °F to 275 °F for broad temperature range
  • Compact 4.92 in length and 33 mm hex simplify installation in tight spaces

3/4" FNPT Axial Drain Valve

This nickel-plated brass axial valve provides a normally closed drain point for 3/4-inch FNPT piping. It operates with a pilot pressure between 60 and 115 psi and withstands system pressures up to 150 psi. FKM seals handle fluid temperatures from -4 to 275 degrees Fahrenheit. The compact body measures 4.92 inches long with a 33-millimetre hex.

Industrial fluid systems needing pilot-operated

Suited for compressed air, inert gas or compatible liquid lines where a remote pilot signal controls drainage. Builders requiring a manually operated ball valve or a higher flow coefficient should look elsewhere. Systems exceeding the 150 psi pressure limit or the 275-degree temperature ceiling need a different component.

150 psi maximum operating pressure

This rating defines the highest line pressure the valve body and seals are designed to contain safely. Exceeding it risks leakage or structural failure regardless of pilot pressure applied. Verify your system pressure stays at or below this figure before installation.

How it compares

Measured against everything we stock in Drain Stoppers, Strainers & Traps, at today’s prices. Recalculated every night.

Price $260.99
Pricier than about 88% of the 4,240 comparable items (median $31.99).

Specifications

Product
Brand nameLegris
Model name4203 20 28 20
Product typeDrain Components
Size & build
Main materialHAWA

Questions about this item

Does the 150 psi maximum operating pressure limit continuous-duty heat buildup?

The valve body is nickel-plated brass rated to 150 psi and 275 °F, so sustained pressure and temperature stay within those limits during all-day operation.

What pilot supply do I need to actuate the 1/8 in FNPT pilot port?

A compressed-air source delivering 60 to 115 psi to the 1/8 in FNPT pilot port will reliably shift the normally-closed valve.

Will the 33 mm hex and 4.92 in length fit alongside my existing 3/4 in FNPT piping?

The 33 mm hex and 4.92 in overall length occupy the same envelope as standard 3/4 in FNPT inline valves, so it threads into existing lines without re-piping.

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