1 in OD x 18 in Flexible Gas Connector Kit - Tankless Water Heater

In this review the reviewer examines the 1 in OD x 18 in flexible gas connector kit designed for tankless water heaters and similar high-demand gas appliances. The bottom line: this kit is for homeowners and installers who need a durable, weatherproof connector with easy installation and a complete service valve kit; the single biggest reason to buy is the SafeGuard yellow coating and CSA certification, which together deliver reliable corrosion resistance and approved indoor or outdoor use. The kit is notable for being 100% leak tested, including brass fittings and a pressure relief valve, which gives confidence for long-term service.

Key Features

• 1 in OD flexible tubing: The 18 in length of corrugated stainless steel tubing provides a sturdy, high-flow connection that suits tankless water heaters and other high-demand gas appliances.
• SafeGuard yellow coating: A patented coating protects the tubing from corrosion and common household cleaners so it can be used outdoors or in humid utility spaces.
• Complete fittings included: Two brass fittings (3/4 in MIP tapped 1/2 in FIP and 3/4 in FIP) allow straightforward connection without sourcing extra adapters.
• Service valve kit: Includes separate cold and hot 3/4 in female NPT service valves plus a 3/4 in pressure relief valve to simplify installation and maintenance.
• Tested and certified: CSA certification and 100% leak testing deliver professional-grade safety assurance for natural gas or propane.
• Installation accessories: The kit comes with high-density PTFE sealant tape, a gas leak detector and clear instructions to speed a correct install.

Who It's For

The connector kit is aimed at homeowners, plumbers and contractors installing or replacing connections for tankless water heaters or other high-flow gas appliances that require a 1 in OD flexible gas line. Its weatherproof SafeGuard coating, CSA certification and included service valves make it a good choice where outdoor exposure or long, uninterrupted service is a concern.

Those who should look elsewhere include customers who need a different length or diameter than 18 in and 1 in OD, or who prefer rigid piping solutions; the kit is specifically built as a flexible connector with the supplied fittings and valves rather than a full plumbing manifold.

Pros & Cons

Pros

• Durable, corrugated stainless steel tubing with a protective yellow SafeGuard coating for indoor or outdoor use.
• Comes ready for installation with brass fittings, service valves, PTFE tape and a gas leak detector.
• CSA certified and 100% leak tested, offering professional-level safety and reliability.
• Backed by a 10-year warranty and services provided in the USA.

Cons

• Some customers report occasional missing parts on arrival, so buyers should verify the contents against the packing list before installation.
• The fixed 18 in length may not suit installations that require longer or shorter runs without additional fittings.

Specifications

Our Verdict

The 1 in OD x 18 in flexible gas connector kit is a practical, professional-grade option for tankless water heater installations that need a reliable, weatherproof connection. With CSA certification, SafeGuard coating and a complete service valve kit included, it represents good value for installers who want a ready-to-install, leak-tested solution, provided the fixed length matches the job.

Frequently Asked Questions

Is this connector suitable for propane as well as natural gas?
Yes. The kit is approved for LP/Propane and natural gas and is CSA certified for both.

Does the kit include installation accessories?
Yes. It ships with high-density PTFE sealant tape, a gas leak detector and written installation instructions.

Can this be used outdoors?
Yes. The SafeGuard yellow coating and CSA certification allow indoor or outdoor installation, but inspect fittings and seals during install.