NITTO KOHKI 12TPH BRASS 1-1/2" Valveless Brass Hose Barb Coupler

The internal architecture of this model features a "valve-less" (straight-through) design, meaning the internal passage is 100% fully open with no valve mechanism or spring obstructing fluid flow. This delivers the highest flow rate in its class and very low pressure drop. It is especially ideal for applications requiring high-volume fluid transfer or highly viscous fluids such as lubricants, liquid chemicals, or industrial water without worrying about clogging. Ensure precision and tight sealing when paired with genuine matching series sockets from NITTO KOHKI.

Valve-less structure: Opens the flow channel to full capacity, providing maximum fluid flow rate without resistance or pressure drop inside the coupler.

Industrial-grade genuine brass body: Offers corrosion resistance, withstands sun and rain, does not rust, and resists certain chemicals better than conventional steel materials.

1 1/2-inch hose barb end: Meticulously designed, well-proportioned barbs grip the hose tightly, preventing hose slippage when secured with a hose clamp.

Fast and durable connection: World-standard plug dimensions allow easy connection, secure locking, safety, and leak-free performance, supporting normal working pressures up to 4.5 MPa.

Genuine Japanese standard (Made in Japan): Manufactured and dimensionally controlled by Nitto Kohki's factory in Japan, ensuring heavy-duty durability and long service life.

Ideal for large-scale agricultural jobs and machinery cooling systems requiring rapid, high-volume water circulation.

Used in fluid transfer systems for viscous fluids, such as engine oil, hydraulic oil, or liquid chemicals that are non-corrosive to brass, where valved couplings could easily cause clogging.

Suitable for industrial plants, construction sites, and disaster relief operations requiring rapid water line connections.

Brand: NITTO KOHKI

Product Series: TSP Cupla

Model Number: 12TPH BRASS (Short code: 12TPH)

Coupler Type: Male Plug

Coupler Connection End: Size 1 1/2" (TSP Series 12 Quick Connect System)

Hose/Pipe Connection End: Hose Barb for 1 1/2" I.D. hoses

Internal Valve Mechanism: Valveless (Straight-through / Valve-less)

Body material: Brass

Working Pressure: 4.5 MPa (45 bar / 652 PSI)

Proof Pressure: 6.5 MPa (65 bar)

Operating Temperature Range: -20°C to +80°C (depends on the seal material used in the mating female socket)

Country of Manufacture: Japan (Made in Japan)