Rainstopper

Effective Inflow Protection Since 1981 Rainstopper has been a third-generation, family-owned company committed to eliminating manhole inflow and infiltration (I&I). Over the decades, we’ve built and maintained strong relationships while helping communities around the world improve wastewater infrastructure. Our manhole inserts are designed to protect municipal sewer systems from costly damage and overloads by keeping stormwater, runoff, and debris out of the wastewater stream. That means lower treatment costs, longer-lasting infrastructure, and a system that keeps performing under pressure. Our Product Options: Stainless Steel Inserts: Crafted from durable, corrosion-resistant 18-gauge 304 (or 316) stainless steel. They include a patented gas relief valve that handles intense environments with ease. HDPE Inserts: Lightweight, economical, and resistant to impact, chemicals, oils, and fuels. Engineered for quick installation with a convenient strap handle and built-in diffuser Reliability You Can Count On Each Rainstopper insert includes a limited 15‑year replacement warranty. If there’s a defect in materials or workmanship, we’ll replace it at no cost—provided it hasn’t been mishandled or used abnormally (warranty excludes the handle, valve, and gasket). Ready to strengthen your infrastructure and reduce unnecessary costs? Reach out to learn how Rainstopper Manhole Inserts can safeguard your system.