Inlet Protection

Filter stormwater runoff and protect drain inlets with Inlet Protection BMPs

Whether above-ground or below-grate, Inlet Protection BMPs help prevent sediment, debris, pollutants, and other particles from entering any storm drainage system. Easily and effectively prevent scour and silt concentration in drop or curb inlets, storm drainage systems and receiving channels with MKB Company BMPs.



Variety of BMPs fit virtually any storm drain system


Use heavy duty StormCatcher or RockSock for high traffic areas


Filter 20+ common stormwater pollutants with EnviroSoxx and StormExx


Weighted BMPs stay put in concentrated flows without trenching, stakes, or anchors


Prevents street flooding


Easy to install & remove


BlackHawk inlet filter mat is a versatile sediment control device that features easy installation, hassle-free maintenance, and high sediment storage capacity to prevent street flooding.
Keep construction dirt out of storm drains while still allowing water to pass through with FryeFlow Inlet Filter Bag. Featuring under-grate installation, easy cleaning, and superior sediment control.
Filtrexx SiltSoxx, the original compost filter sock, is now a part of the MKB family. Get the same quality and research-backed product that you’ve come to trust for sediment control.
Filled with rice hull filter media, SiltSoxx RH is the newest, lightest filter sock for your BMP toolbox. Use SiltSoxx RH just like a compost filter sock for standard sediment control applications.
When you need a temporary yet robust filter berm, StormCatcher is ready for the job. Its innovative rice hull + gravel fill allows for a high flow, high sediment retention BMP.
Trap sediment from stormwater runoff that flows onto roadways from construction activities. Durable and reusable, RockSock stays put in concentrated flows without trenching, stakes, or anchors.
Straw wattles are a staple of any BMP toolbox. Choose from a selection of common wattles, advanced netting wattles, or biodegradable wattles.
StormExx CLEAN catch basin filters are designed to fit most existing storm water drain systems to capture sediment and pollutants.
Stop pollutants from leaving your site today – EnviroSoxx targets over 20 common post-construction stormwater pollutants including metals, nutrients, hydrocarbons, bacteria, pH, and suspended solids.


Around drain inlets

In front of curb inlets

As curb sediment containment system

Around storm drainage systems

Receiving channels



Drain inlets are located in areas that receive runoff from surrounding lands, often exposed and disturbed soils, and are located at a low point, or in a sump. Inlet protection used around drain inlets (or rain inlet protection) should completely enclose the circumference of the drain and where possible should not be placed on a grade or slope. Inlet protection used around drain inlets should never be the only form of site sediment control and should be accompanied by erosion control/slope stabilization practices, such as compost erosion control blankets or rolled erosion control blankets. Inlet protection should never be placed where they divert runoff flow from the drain inlet, or on top of the inlet, which can cause flooding. Under high runoff and sediment loading conditions placement of 1-2 in (25-50 mm) diameter rock (AASHTO #2) may be placed around the outer circumference of the inlet protection up to ½ the height of the inlet protection. This will help slow runoff velocity as it contacts the inlet protection and will reduce sediment build-up and clogging of the inlet protection.


Curb inlets are generally located on paved surfaces and are designed to rapidly drain storm runoff from roadways to prevent flooding that poses a hazard to vehicular traffic. Inlet protection devices should be placed in a manner which intercepts runoff prior to entering the inlet, but does not block or divert runoff from the inlet. To prevent diversion of runoff, inlet protection used around curbs (or curb inlet protection) should be used in low points, or sumps, and minor slopes or grades. Inlet protection should never be placed in or on the curb inlet drain, or placed in a manner that obstructs vehicular traffic. Inlet protection height should be at least 1 in (25 mm) lower than top of curb inlet to allow for overflow into the drain and not over the curb. Maximum sediment removal efficiency occurs when minor ponding exists behind inlet protection but should never lead to flooding.


Curb sediment containment systems are used to reduce the sediment and pollutant load flowing to a curb inlet. They are generally placed on paved surfaces perpendicular to runoff flow and should be lower than the height of the curb. Curb sediment containment systems should never cause flooding or be placed where they are a hazard to vehicular traffic. Inlet protection used for curb sediment containment (or curb sediment containment inlet protection) can be placed on a grade but should never be placed directly upslope from curb inlet where it may inadvertently divert runoff from entering curb inlet.


We provide FREE access to our Design Manual. Our database includes product specifications, installation guidelines and recommendations, as well as CADs for over 25 applications. Engineers, designers and installers rely on our Design Manual to evaluate our products and find best suitable solutions.