Lightweight. Cost-Effective. Reliable.

The HDPE Rainstopper is our budget-friendly inflow solution – delivering effective inflow reduction at a lower cost. What makes it different: at only 2 pounds, it’s the lightest Rainstopper model, making installation fast and labor costs minimal.

This is the choice for cost-conscious projects. Manufactured in the USA from durable HDPE plastic, it provides reliable inflow protection in light to moderate stormwater environments without the premium price of stainless steel.

Need added security? See HDPE with Tetherlok  (recommended upgrade)
Need heavy-duty protection? Consider Stainless Steel options 

Key Benefits

• Cost-effective solution – Lower-cost option with effective inflow reduction performance.
• Lightweight and easy – Weighs just 2 lbs; quick, one-person installation in about three minutes.
• No engineering needed – Designed for straightforward use with minimal preparation.
• Durable plastic (HDPE) – Resistant to impact, chemicals, oils, and fuels.
• Smart choice for light storm areas – Ideal for municipalities with fewer heavy rainfall events annually.
• Odor and noise control – Reduces sewage odors, traffic noise, and manhole cover movement.

Best For

• Budget-conscious projects where inflow reduction is needed at a lower price point.
• Smaller systems or light stormwater areas with moderate rainfall or lower inflow pressure.
• Routine maintenance and inspection programs where lightweight handling reduces labor costs.
• Temporary or phased projects for testing inflow prevention or areas with planned upgrades.
• Odor and noise reduction in residential or low-traffic areas.