Inflow Solutions
Stainless Steel Rainstopper
Proven, long-lasting protection against manhole inflow.
Stainless Steel with Tetherlok
Added security and
theft prevention for manholes.
50-Year Pan
Premium extended-life model with 50-Year Gasket.
HDPE / Plastic Insert
Lightweight, durable,
and cost-efficient
inflow control.
HDPE With Tetherlok
Lightweight and cost-efficient plus added security.
OdorKnocker Model RX
Proven H2S odor
control for municipal manholes.
Customization Options
Configure your ideal manhole inflow
solution.
50-Year Pan
For Maximum Reliability and Peace of Mind
The 50-Year Pan is Rainstopper’s premium extended-life configuration. What sets it apart: the advanced 50-Year Gasket and a stainless steel handle, creating a complete system engineered for maximum longevity in the most demanding conditions.
This is the upgrade when standard isn’t enough. Designed for flood-prone areas, high groundwater pressure, and projects where long-term sealing assurance justifies the premium investment.
Standard performance sufficient? See Stainless Steel Rainstopper
Need added security too? This can be combined with Tetherlok (custom order).
What Makes the 50-Year Pan Different
50-Year Gasket (Extended Life Gasket)
Rainstopper’s most advanced sealing technology engineered to last the full service life of the insert. This flexible, high-adhesion elastomer delivers exceptional flexibility, adhesion, and durability under long-term water pressure conditions. It provides a continuous, watertight seal that eliminates common failure points, resists fatigue and cracking, and bonds seamlessly with stainless steel for decades of reliable, maintenance-free performance.
The 50-Year Pan combines this advanced gasket with premium components for unmatched long-term performance:
Stainless Steel Handle
Corrosion-resistant for decades of reliable use. Standard on this model for maximum durability.
304 Stainless Steel Pan
Constructed from 18-gauge (1/16″) corrosion-resistant stainless steel. Also available in 316 stainless for high-corrosion environments.
Patented Ribbed Pan
Adds structural strength and prevents deformation under heavy loads.
Patented Nitrile Gas Relief Plug
Non-mechanical venting design with offset placement to prevent accidental dislodging during maintenance.
Key Benefits
- Stops inflow – Prevents stormwater, runoff, and debris from entering sewer lines.
- 50-Year Gasket – Rainstopper’s most advanced sealing technology engineered to last the full service life of the insert with exceptional flexibility, adhesion, and durability.
- Durable construction – Made in the USA from corrosion-resistant 304 or 316 stainless steel.
- Maintenance-free – Non-mechanical venting device eliminates moving parts.
- Lightweight and easy – Weighs approximately 10–14 lbs for simple, one-person installation.
- 50+ year service life – Engineered for decades of reliable performance in challenging environments.
Best For
- Flood-prone or high-groundwater environments where sealing is critical.
- Municipalities requiring extra assurance in demanding or high-pressure conditions.
- Projects where long-term resilience and minimal maintenance justify premium investment.
- Systems where gasket failure would be costly or difficult to address.
Product Resources
- Product Specifications (PDF)
- Measurement Worksheet & Instructions
- Installation Guide
- Storage & Care Guidelines
- Warranty Information
Ready to Go?
Choose the 50-Year Pan for proven inflow protection and extended-life performance.
Stainless Steel Rainstopper
Configure your ideal manhole inflow solution.
Stainless Steel with Tetherlok
Proven, long-lasting protection against manhole inflow.
50-Year Pan
Premium extended-life model with 50-Year Gasket.
HDPE / Plastic Insert
Lightweight, durable, and cost-efficientinflow control.
HDPE With Tetherlok
Lightweight and cost-efficient plus added security.
OdorKnocker Model RX
Proven H2S odor control for municipal manholes.
Customization Options
Configure your ideal manhole inflow solution.