3/4" Stainless Steel Corrugated Connector for Water Heaters.

PRO1H18 FLUIDMASTER WATER HEATER FLEX CONNECTOR 3/4" FNPT X 3/4" FNPT X 18" L 2036481

The Fluidmaster PRO1H18 Water Heater Connector is a professional-grade flexible connector engineered for high-performance installation in residential and commercial water heating systems. Designed for superior mechanical strength and corrosion resistance, this 18-inch connector combines a heavy-duty stainless steel braid with a reinforced polymer core to ensure long-term reliability under high-pressure and high-temperature service conditions. Its construction and materials exceed industry standards for flexible water connectors, providing dependable service life and leak-free operation in professional plumbing applications.

Technical Specifications

• Manufacturer: Fluidmaster, Inc.
• Model Number: PRO1H18
• Part Number: 2036481
• Type: Flexible Water Heater Connector
• Length: 18 inches (457 mm)
• Connection Type: 3/4" FNPT x 3/4" FNPT
• Material Construction:
  • Outer braid: Stainless steel with high-tensile wire (220 feet of wire per foot of hose)
  • Inner core: NSF-approved polymer resistant to chlorine and chloramine exposure
  • Ferrules: Extra-long stainless ferrules with radial crimps for added structural security
  • Hex nuts: Heavy-duty nickel-plated brass for corrosion resistance and secure torque
• Flow Capacity: Optimized internal diameter for unrestricted flow rate
• Operating Temperature Range: Suitable for hot and cold water service
• Pressure Rating: Exceeds ASME A112.18.6 and CSA B125 performance standards
• Sealing Method: Captive cone washers prevent displacement and ensure a watertight seal
• Flexibility: Kink- and crease-resistant design for confined-space installation
• Compliance: NSF certified; conforms to ASME A112.18.6 / CSA B125
• Application: Water heater connection and general hot water system service

Professional Summary

The Fluidmaster PRO1H18 Water Heater Connector delivers a high-integrity connection solution engineered for professional-grade plumbing systems. Its stainless steel braided exterior and polymer core construction provide superior resistance to corrosion, pressure deformation, and thermal cycling. The extended ferrule design with radial crimps enhances joint stability, while captive cone washers simplify alignment and eliminate field sealing issues. Suitable for standard 3/4-inch water heater fittings, the PRO1H18 ensures reliable, code-compliant performance in both retrofit and new construction environments where mechanical durability and installation efficiency are required.