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Black polypropylene reducing coupling with FNPT threads 1-1/2 by 1-1/4

Banjo

Banjo RC150-125 Reducing Coupling 1-1/2 x 1-1/4 trap

SKU CH-6TCD-BKSNH MPN RC150-125

Reducing coupling joins 1-1/2 inch to 1-1/4 inch FNPT threads in Schedule 80 polypropylene rated to 150 psi from -20 to 150 degrees F

  • Product typeDrain Components
  • Main materialHAWA
  • Product colorBlack
  • Polypropylene construction resists corrosion and chemicals
  • Schedule 80 rating handles 150 psi working pressure
  • Operates from -20 °F to 150 °F for broad temperature range
  • FNPT x FNPT threads enable direct pipe-to-pipe connection
  • Reduces 1-1/2 in to 1-1/4 in for flexible plumbing layouts

Reducing Coupling for Schedule 80 Pipe

The Banjo RC150-125 is a Schedule 80 polypropylene reducing coupling designed to join 1-1/2 inch and 1-1/4 inch FNPT threaded pipe ends. It suits plumbing installers and maintenance crews who need a chemical-resistant transition fitting rated for 150 psi service pressure.

Replaces Mismatched Thread Sizes

This coupling upgrades connections where dissimilar pipe diameters meet, eliminating the need for separate bushings and nipples. The jump is worth it when a single Schedule 80 fitting can reduce leak paths and cut assembly time on polypropylene systems operating between -20 and 150 degrees Fahrenheit.

Holds Seal Under Constant Pressure

Under sustained 150 psi load the polypropylene body resists creep and stress relaxation better than short-burst tests suggest. The material maintains dimensional stability across the full -20 to 150 degree Fahrenheit range, so threaded joints stay tight during continuous duty cycles.

How it compares

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

Price $7.99
Cheaper than about 88% of the 4,240 comparable items (median $31.99).

Specifications

Product
Brand nameBanjo
Model nameRC150-125
Product typeDrain Components
Product colorBlack
Size & build
Main materialHAWA

Questions about this item

Will the 1-1/2" x 1-1/4" FNPT threads connect directly to Schedule 80 pipe without adapters?

Yes, the FNPT x FNPT ends thread onto male NPT fittings or pipe nipples; the Schedule 80 rating means the coupling wall thickness matches heavy-wall pipe.

Do I need pipe tape or thread sealant on the tapered NPT threads, and how tight should I go?

Apply PTFE tape or paste to the male threads only, then tighten one to two turns past hand-tight — over-torquing polypropylene can split the hub.

The spec lists a -20 °F to 150 °F range; what degrades first if the line sees hotter water?

Polypropylene softens above its rated temperature, so sustained exposure above 150 °F will cause creep and eventual joint leakage; replace the coupling if the system regularly exceeds that limit.

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