The Mosmatic 58.151 DYF Swivel is a high-performance rotary union for high-pressure cleaning systems. Featuring a 3/8" NPTF inlet and a 1/4" NPTM outlet, it offers a step-down connection ideal for transitioning between larger inlet hoses and smaller nozzles or spray lances.

Its nickel-plated brass body, combined with stainless steel internals and a carbide seal system, delivers smooth 360° rotation, reliability under high pressure, and long service life. Built for operating pressures up to 4000 psi, it includes weep holes to indicate seal wear or failure.

Applications

• Pressure washers and mobile wash systems

• Car wash underbody and boom systems

• Industrial fluid transfer setups

• Rotating nozzles with step-down connections

Features

• Full 360° swivel with sealed bearing system

• Carbide seal for durability and performance

• Step-down: 3/8" to 1/4" threading

• Maintenance-free design

• Visual seal failure detection

• Nickel-plated brass body for corrosion resistance

Specs

Product Type: High-pressure swivel – DYF
Part Number: 58.151
Pressure: 4000 psi
Temperature: 250°F
RPM: max. 2,000 rpm
Material Type: Brass, nickel plated
Inner Part: Stainless steel
Seal: Carbide
Throughput / Medium: pH 3–12 / filtered 10 microns / compressed air (290 psi)
Thread In (G1): 3/8" NPTF
Thread Out (G2): 1/4" NPTM
Nominal Width (NW): 1/4"
Wrench Size 1 (SW1): 0.87"
Wrench Size 2 (SW2): 0.67"
Diameter (D): 2.36"
Length 1 (L1): 1.45"
Length 2 (L2): 0.43"
Weight: 11.0 oz