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Black Schedule 80 polypropylene reducing bushing, 4" x 3" MNPT x FNPT

Banjo

Banjo RB400-300 Reducing Bushing 4" x 3" Schedule 80 Polypropylene trap

SKU CH-R9HH-V67JE MPN RB400-300

Schedule 80 polypropylene reducing bushing connects 4-inch male to 3-inch female NPT threads, rated to 150 psi from -20 to 150 degrees F

  • Product typeDrain Components
  • Product colorBlack
  • Reduces 4-inch to 3-inch pipe connections
  • Schedule 80 polypropylene handles 150 psi pressure
  • MNPT x FNPT threads ensure secure fit
  • Operates from -20 to 150 degrees Fahrenheit
  • Black Schedule 80 material resists corrosion

4" x 3" Schedule 80 Reducing Bushing

The Banjo RB400-300 reduces a 4 inch male NPT connection to a 3 inch female NPT connection. It is moulded from black Schedule 80 polypropylene for chemical resistance. The fitting is rated for a maximum pressure of 150 psi. Operating temperature range spans from -20 to 150 degrees Fahrenheit.

For pipe systems needing a 4 to 3 inch step-down

This bushing suits installers joining dissimilar NPT pipe sizes in Schedule 80 polypropylene networks. It is not for solvent-weld or compression joints. It is not for applications exceeding the 150 psi pressure limit. It is not for service above 150 degrees Fahrenheit.

MNPT x FNPT thread connection

The male-by-female NPT thread pattern determines whether this bushing matches the existing fittings. Verify both thread gender and size before ordering. The Schedule 80 class and polypropylene material define the pressure and temperature boundaries.

How it compares

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

Price $21.99
Cheaper than about 62% of the 4,240 comparable items (median $31.99).

Specifications

Product
Brand nameBanjo
Model nameRB400-300
Product typeDrain Components
Product colorBlack

Questions about this item

What comes in the box with the RB400-300 reducing bushing, and do I need to buy any extra parts?

The box contains the single 4 in x 3 in Schedule 80 polypropylene bushing with MNPT x FNPT threads. Pipe sealant or tape for the tapered threads is not included and must be purchased separately.

How do I decide between the available versions or capacities of this fitting?

This model is offered only as a 4 in x 3 in Schedule 80 polypropylene bushing rated to 150 psi. If your system requires a different pipe size, schedule rating or material, you would need a different part number.

What does the 150 psi rating mean when the bushing is installed in a real plumbing system?

The 150 psi maximum pressure rating applies at the published temperature range of -20 °F to 150 °F, so the fitting can handle that pressure throughout its operating temperature window when properly threaded and sealed.

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