Logo, No Flow In Flow - Manhole Inserts

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1336 W Blanco Road
San Antonio, TX 78232

Stainless Steel Manhole Inserts


Reliable Inflow Protectors in Sanitary Sewers

Protect your sewer system with high-quality inflow protectors and preventers by calling No Flow In Flow in San Antonio, Texas. Our supply of manhole inserts offers you the power and flexibility to keep your system clean while maintaining an affordable budget and improving your safety levels.

An Economical Solution to a Costly Problem

One of the most important problems facing the 21st century is water conservation. The water and sewer industry is being called upon to find new solutions to old problems and to ensure that water is treated and used efficiently.

During rainy weather, an average manhole contributes 3,000-12,000 gallons of rainwater per day into the treatment systems. Our No Flow In Flow dish is made to our exact requirements from a virtually indestructible material, allowing us to offer you a simple-to-install, long-lasting product that eliminates sheet flow of rainwater into the sanitary sewer system.

Wave - Inflow Protectors

Added advantages include the elimination of debris and dirt intrusion, as well as the reduction of manhole odors and manhole cover rattle noise.


Customer Benefits

Our inserts are made of a high-performance resin known as Marlex HXM 50100, which offers outstanding melt strength and results in molded parts that have excellent stress-cracking resistance, good rigidity, and excellent impact strength, even at low temperatures. To give you an idea of the strength of our products, the resin they’re made from has suggested applications for blow-molded and thermoformed items including:

• 55-Gallon Shipping Containers
• Gasoline Tanks

• Agricultural Chemical Tanks
• Pallets

• Cattle Feeders
• Large Formed Parts

• Boats

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Contact No Flow In Flow in San Antonio, Texas, for high-performance manhole inserts and intake preventers made of one of the most durable polymers on the planet.