Safe. Secure. Theft-Proof.

The Stainless Steel Rainstopper with Tetherlok is our security-focused configuration. What sets it apart: the patented Tetherlok cable system that prevents theft, loss, and accidental drop-through during inspections and maintenance.

This is the choice when asset protection matters. A 3/16″ braided stainless steel cable secures the insert to the manhole frame, ensuring it stays where it belongs and eliminating costly retrievals that can range from hundreds to thousands of dollars.

Security not a concern? See the Standard Stainless Steel Rainstopper
Need extended life too? The 50-Year Pan can be combined with Tetherlok (custom order)

Key Benefits

• Stops inflow – Blocks stormwater, runoff, and debris from entering sewer lines.
• Tetherlok security – Cable system prevents theft, guarantees reinstallation, and eliminates loss down the line.
• Durable construction – Made in the USA from corrosion-resistant 304 or 316 stainless steel.
• Maintenance-free – Patented non-mechanical venting device eliminates moving parts.
• Lightweight and easy – Weighs approximately 10–14 lbs for simple, one-person installation.
• Flush-fit installation (1/8″) – Prevents plow damage and trip hazards.
• Proven reliability – Tested to withstand flood conditions (16 ft of water, 2,000+ hours, zero leaks).
• Controls odors and noise – Reduces sewage odors, traffic-related noise, and cover displacement.

Best For

Everything the Standard Stainless Steel Rainstopper handles, with added benefits for:

• High-traffic or theft-prone areas where security is critical.
• Municipalities wanting a fail-safe against installation errors or lost units.
• Projects needing both inflow protection and asset protection.
• Systems where accountability and guaranteed reinstallation are required.