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Small brass automatic float drain threaded 1/8 NPT

SPEEDAIRE

SPEEDAIRE MDV-400 Float Drain 1/8 in NPT

SKU CH-WA6A-78KXY

Automatic float drain with 1/8 in NPT threaded port removes condensate from compressed air lines

  • Automatic float drain removes condensate without manual intervention
  • 1/8 in NPT threaded port fits standard compressor fittings
  • Compact 3 in height suits tight installations
  • 1 13/32 in width allows easy placement
  • SPEEDAIRE Series BOD design ensures reliable operation

SPEEDAIRE MDV-400 Float Drain

The SPEEDAIRE MDV-400 is an automatic float drain designed for compressed air systems. It removes accumulated condensate without manual intervention, suiting workshops and industrial sites that run air compressors regularly. The 1/8 in NPT threaded port fits standard drain openings on tanks, filters and aftercoolers. This new component carries a California Proposition 65 warning for listed chemicals.

Automatic operation under continuous use

The float mechanism opens the valve when liquid reaches a set level and closes it once the water is expelled, preventing compressed air loss. Because it operates purely on buoyancy, it needs no electrical supply or timer adjustment, so it keeps working during extended shifts or unattended periods. The 3 in overall height lets it sit in tight drain ports without fouling surrounding pipework. Performance stays consistent as long as the inlet pressure remains within the drain's rated range.

Brass construction with threaded NPT connection

The body is built from brass for corrosion resistance in moist, oily air lines. A 1/8 in NPT male thread screws directly into the drain port, and the 1 13/32 in width clears most filter bowls and separator housings. No extra fittings or adapters are included, so installers must supply any required nipples or sealant. The unit is restricted from sale in certain states due to the Proposition 65 listing.

Highlights

  • Automatic float drain removes condensate without manual intervention
  • 1/8 in NPT threaded port fits standard compressor fittings
  • Compact 3 in height suits tight installations
  • 1 13/32 in width allows easy placement
  • SPEEDAIRE Series BOD design ensures reliable operation

Specifications

BrandSPEEDAIRE

Questions about this item

How much power does the MDV-400 float drain consume when running continuously?

The float drain operates mechanically from system pressure and requires no electrical power to function.

What threading must my compressor tank or separator have to accept this 1/8 in NPT drain?

The mating port must be a female 1/8 inch NPT thread to match the drain's male connection.

Will the MDV-400 fit the same mounting pattern as an older Speedaire BOD series drain?

Yes, the MDV-400 is listed as compatible with the Speedaire BOD series and shares the 1/8 in NPT port size.

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