Frequently Asked Questions


The TRITON Filter™, GEO-TRAP Filters™, TDAM Filters™, Curb Protectors™, StormWeb™ are all filter systems that are designed to be inserted below the grate or at the entrance of storm water inlets. They have been designed to help eliminate hydrocarbons and other contaminants commonly found in storm water runoff. The filters come in a wide range of sizes, shapes and dimensions, including square, round, rectangular, curb inlets, area drains, and trench drains.

The filter functions as a water purifying system at the point of entry to storm drain systems. As the water enters the drainage inlet, it falls into the filter’s receiving basin and flows through a replaceable filter medium (Media-Pak). This filter medium is capable of removing up to 99.4% of the contamination from oil and other petroleum-based contaminants, along with capturing sand, silt, cups/bottles, and litter such as packing material, glass, bottle caps, etc.

The filters have been uniquely designed to filter large amounts of runoff without impeding the drain’s designed hydraulic capacity. Due to the filter medium’s hydrophobic nature (ability to repel water), water is able to flow smoothly through the filter while hydrocarbons are trapped. During heavy flows which exceed flow-through-capacity, the filter allows the excess to flow over the inside edge of the filter tract and spill into the center of the storm drain. For curb inlet units the heavy flows are simply released to the rear of the inlet.

The filters have been design to allow for the easy removal of debris, such as rocks, large gravel, garbage, leaves, landscaping material, etc.. The filters have been designed to hold the litter and debris in accessible locations for their easy removal. This allows for easy on-site maintenance when filters are ready to be serviced.

Due to the extremely corrosive environment that are filters are subjected to, we have chosen materials that will stand up to these environments. TRITON Curb Inlets housings are made of Non-reactive High Impact Polystyrene Plastic construction with added U.V. inhibitors. Over 40% of the plastic used comes from recycled content. Our TRITON Drop Inlet housings are made of Non-reactive High Density Polyethylene Plastic (H.D.P.E.) with U.V. inhibitors. These types of polystyrene and Polyethylene plastics have proven their effectiveness in these environments for many years. Any metal that is used is made of Stainless Steel Type 304. The MediaPak’s that are used in both the curb inlets and drop inlets, are constructed of geo-textile polypropylene fabric and is held in place by the MediaPak Cage, which is made of 8 gauge Type 304 Stainless Steel.

The useful life of the filter medium is based on the quantity of contaminants it collects. The filter material has the ability the repel water (hydrophobic), yet absorb up to 500% of its own weight in oil when fully saturated. A typical 24”X24” size filter has the ability to absorb between 1 and 2 quarts of contaminants when fully saturated. On average we suggest at least three cleanings are performed throughout a given year. One of those cleanings (preferably May/June) should also include the change out and replacement of the Media-Pak. Each site can be different from the next, requiring different service intervals, such as a retail center vs. a business park. It is very important to determine what the service needs are going to be in order to keep the filters running effectively throughout the service year. At least one absorbent medium recharge per year is recommended under normal conditions. Filters placed in areas of higher contamination may require more frequent servicing. To receive an estimate for our yearly service maintenance program, please call our Service Department @ (888) 526-4736.

The filter beads are totally inert, non-toxic, and non-carcinogenic. XSORB® Select is licensed as an oil spill cleanup agent by the California E.P.A.’s State Water Resources Control Board. The material is also non-biodegradable and non-leaching for approved landfill disposal.

The used XSORB®, technically classified as “Hazardous Petroleum Waste Solid,” is removed from the filter and placed in an approved container for transportation. The used filter medium must be disposed of in accordance with Federal, State and Local laws for petroleum waste. REM Inc. participates in a recycling program that separates and recycles the oil and absorbent media, lessening customer liability and decreasing landfill use while doing the most to protect the environment.

One of our goals at REM was to design a product that has excellent product longevity. We chose to use Non-reactive High Impact Polystyrene Plastic due to its excellent qualities in damp and corrosive environments. We have also added U.V. inhibitors, so that we would further improve its longevity. Although we do not have an exact life expectancy on our filters as of yet, we do believe that the materials we have chosen, should yield an excellent life expectancy. We back this up by offering an extended warranty which totals up to six years from the date the filters’ initial installation, when the customer uses REM for their Service Maintenance Program.