Slot Drain

Slot drain (also known as slot pipe or slotted drain) offers a solution for areas where high flows are needed and large grates are not desirable.  Slot drains are heavy duty commercial grade drains that are typically used in highways, roads, driveway entrances, curb and gutter, and other high speed and high flow applications.  The slot pipe product line is offered in 4", 6", 8", 12", 15", 18", 21", 24", and 36" widths.  Dura Trench slot drains have many significant improvements over traditional culvert metal slot drains.  The first major improvement is a smooth flow line that increases flow velocity.  The increased slot drain flow velocity means that often a smaller diameter smooth pipe can carry the same flow as a larger culvert metal slot drain.  In addition to this the amount of debris that collects in the bottom of the slot drain is significantly reduced.  The second major improvement Dura Trench made is to the load bearing frame at the top of the slot pipe.  The traditional vertical riser is offered, but for drains that will receive heavy traffic loading the frame was re-designed to transfer the loading off the slot drain body and to the surrounding concrete.  This significantly improves the load bearing capacity of these systems while eliminating long term deterioration of the slot drain due to loading.  The next major improvement was that the system is always "variable height" meaning that it can have built in slope.  Many traditional systems do not offer this and therefore cannot carry as much flow.  A non-sloping slot drain also requires a lot more maintenance due to low flow velocities depositing debris in the slot pipe.  A slot drain should always have slope to keep velocities high and debris flushing through the system.  

While improving the flow and loading properties of the slot drain, the installation needs were also assessed.  To make installation easier, the Dura Trench slotted drain pipe is provided with integral couplers and installation devices to make setting and leveling easier.  Furthermore, clean-out boxes are factory installed in the body of the slotted pipe so that time is not wasted with these connections. 

 

Note:  For radius slot drains click here! 

           For stainless steel slot drains click here!

This general purpose slot drain can handle flows in the 0.25 cfs (110 gpm) range.  All Dura Trench slot drains have variable height risers standard.  The standard slot drain section is 10' long.  Installation aides are standard.  The Dura Trench slot drain has a smooth invert for superior flow velocity.  The smooth interior creates self cleaning velocities keeping the slot drain cleaner.  Our slot drains with a wide selection of frames and opening sizes.  This size slot drain is most often used in patios, parks, swimming pools, and for light commercial applications.  Note that this product is also offered in a radius.

This specialty slot drain is typically used against walls or other fixed objects.  It can handle flows in the 0.25 cfs (110 gpm) range.  All Dura Trench slot drains have variable height risers standard.  The standard slot drain section is 10' long.  Installation aides are standard.  The Dura Trench slot drain has a smooth invert for superior flow velocity.  The smooth interior creates self cleaning velocities keeping the slot drain cleaner.  Our slot drains with a wide selection of frames and opening sizes.  This size slot drain is most often used in patios, parks, swimming pools, and for light commercial applications.  Note that this product is offered in a radius.

This general purpose slot drain can handle flows in the 0.8 cfs (350 gpm) range.  All Dura Trench slot drains have variable height risers standard.  The standard slot drain section is 10' long.  Installation aides are standard.  The Dura Trench slot drain has a smooth invert for superior flow velocity.  The smooth interior creates self cleaning velocities keeping the slot drain cleaner.  Our slot drains with a wide selection of frames and opening sizes.  This size slot drain is most often used in patios, parks, swimming pools, and for light commercial applications.  Note that this product is also offered in a radius.

This specialty slot drain is typically used against walls or other fixed objects.  It can handle flows in the 0.8 cfs (350 gpm) range.  All Dura Trench slot drains have variable height risers standard.  The standard slot drain section is 10' long.  Installation aides are standard.  The Dura Trench slot drain has a smooth invert for superior flow velocity.  The smooth interior creates self cleaning velocities keeping the slot drain cleaner.  Our slot drains with a wide selection of frames and opening sizes.  This size slot drain is most often used in patios, parks, swimming pools, and for light commercial applications.  Note that this product is offered in a radius.

This general purpose slot drain can handle flows in the 1.75 cfs (775 gpm) range.  All Dura Trench slot drains have variable height risers standard.  The standard slot drain section is 10' long.  Installation aides are standard.  The Dura Trench slot drain has a smooth invert for superior flow velocity.  The smooth interior creates self cleaning velocities keeping the slot drain cleaner.  This and larger size slot drains begin offering our heavier duty line of frames for high speed traffic and extreme duty loads.  This size slot drain is most often used in parking lots, roadways, driveway entrances, and some high flow pedestrian areas.

This general purpose slot drain can handle flows in the 5 cfs (2250 gpm) range.  All Dura Trench slot drains have variable height risers standard.  The standard slot drain section is 10' long.  Installation aides are standard.  The Dura Trench slot drain has a smooth invert for superior flow velocity.  The smooth interior creates self cleaning velocities keeping the slot drain cleaner.  This and larger size slot drains begin offering our heavier duty line of frames for high speed traffic and extreme duty loads.  This size slot drain is most often used in parking lots, roadways, driveway entrances, and some high flow pedestrian areas.

This general purpose slot drain can handle flows in the 9 cfs (4000 gpm) range.  All Dura Trench slot drains have variable height risers standard.  The standard slot drain section is 10' long.  Installation aides are standard.  The Dura Trench slot drain has a smooth invert for superior flow velocity.  The smooth interior creates self cleaning velocities keeping the slot drain cleaner.  This and larger size slot drains begin offering our heavier duty line of frames for high speed traffic and extreme duty loads.  This size slot drain is most often used in parking lots, roadways, driveway entrances, industrial areas, curb and gutter applications, and some high flow pedestrian areas.

This general purpose slot drain can handle flows in the 15 cfs (6750 gpm) range.  All Dura Trench slot drains have variable height risers standard.  The standard slot drain section is 10' long.  Installation aides are standard.  The Dura Trench slot drain has a smooth invert for superior flow velocity.  The smooth interior creates self cleaning velocities keeping the slot drain cleaner.  This and larger size slot drains begin offering our heavier duty line of frames for high speed traffic and extreme duty loads.  This size slot drain is most often used in parking lots, roadways, driveway entrances, industrial areas, curb and gutter applications, and some high flow pedestrian areas.

This general purpose slot drain can handle flows in the 23 cfs (10,300 gpm) range.  All Dura Trench slot drains have variable height risers standard.  The standard slot drain section is 10' long.  Installation aides are standard.  The Dura Trench slot drain has a smooth invert for superior flow velocity.  The smooth interior creates self cleaning velocities keeping the slot drain cleaner.  This and larger size slot drains begin offering our heavier duty line of frames for high speed traffic and extreme duty loads.  This size slot drain is most often used in parking lots, roadways, driveway entrances, industrial areas, curb and gutter applications, and some high flow pedestrian areas.

This general purpose slot drain can handle flows in the 32 cfs (14,250 gpm) range.  All Dura Trench slot drains have variable height risers standard.  The standard slot drain section is 10' long.  Installation aides are standard.  The Dura Trench slot drain has a smooth invert for superior flow velocity.  The smooth interior creates self cleaning velocities keeping the slot drain cleaner.  This and larger size slot drains begin offering our heavier duty line of frames for high speed traffic and extreme duty loads.  This size slot drain is most often used in parking lots, roadways, driveway entrances, industrial areas, curb and gutter applications, and conveying water from structure to structure.

This general purpose slot drain can handle flows in the 96 cfs (43,000 gpm) range.  All Dura Trench slot drains have variable height risers standard.  The standard slot drain section is 10' long.  Installation aides are standard.  The Dura Trench slot drain has a smooth invert for superior flow velocity.  The smooth interior creates self cleaning velocities keeping the slot drain cleaner.  This and larger size slot drains begin offering our heavier duty line of frames for high speed traffic and extreme duty loads.  This size slot drain is most often used in parking lots, roadways, driveway entrances, industrial areas, and conveying water from structure to structure.

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Slot drain gallery

Car dealership slot drain

This car dealership showroom needed drainage but didn't want a conspicuous grate. A slot drain system was the perfect solution to provide drainage with minimal reveal.

Fueling station slot drain

This fueling station utilized a heavy duty slot drain to contain any diesel that might be spilled. The slotted drain pipe catches the runoff and conveys it to an oil water separator.

Patio drainage

This patio utilized a slot drain system to provide positive drainage of the space with minimal reveal. Slotted drains can capture a large amount of water with minimal visual impact.

Offset slot drain

Dura Trench manufactures offset slot drains that can be placed against walls, buildings, or other fixed objects. Once concrete or paving stones are placed over the drain they are almost invisible.

Bartholemew Church

This church utilized a slot drain system to capture runoff from their parking lot.

Port of Catoosa

This port facility utilized a 15" diameter extreme duty slot drain to capture water from the expanse of concrete paving.

Extreme duty slot drains

Dura Trench extreme duty slot drain systems can take abuse from heavy airport and sea port traffic.

Slot drain connection

Slot drain systems can be provided with pipe extensions to allow easy connections to precast manholes.

Heel proof slot drain

This 12" diameter slot drain does not have a grate to come loose but still has a heel proof and ADA compliant top.

Slot drain to reduce spread

Water spread in curb and gutter applications can be a problem. This 24" wide heavy duty slotted drain system was used to reduce the spread in the curb and gutter.

Slotted drain installation

There are many methods utilized to install slotted drains. The Dura Trench slot drain systems come with installation aides allowing rebar to be driven to control flotation and hold the slot drain on grade.

Slot drain clean out

Slot drains do not have removable grates. It is a good idea to add clean out grates at 100' intervals to allow access for cleaning equipment. Dura Trench manufactures these access ports into the slot drain system.

Slot drain spread control

When water continuously backs up into the roadway and businesses a slot drain can be a viable solution. They are almost invisible but can carry a large volume of water.

Slot drain turns and tees

Dura Trench can ship slot drain parts with shop built turns, tees, and elbows. This slotted drain had a 30 degree turn that was factory built to make installation easy.

Slot drain across intersection

Heavy duty slot drains can be continued across intersections without the concern for grating that could come loose in the dynamic turning and breaking traffic of an intersection.

Pool slot drain

This pool utilized a minimal reveal slot drain system to give much needed drainage to the pool deck.

Fire station slot drain

This slotted drain system was utilized to capture runoff from a fire station apron.

Narrow reveal slot drain

This slot drain system has a very narrow reveal and once poured will be almost invisible.

Highway slot drain

Highways often use slot drain systems near curb and gutter or barrier walls to convey large amounts of storm water. Large diameter slot drains are available up to 36" diameter.

Slot drain in curb

This curb and gutter slot drain system was utilized in a very flat part of a roadway. The 18" variable height slot drain was able to provide positive slope and good flows to this flat longitudinal slope paving area.

Intersection slot drain

This slot drain was placed in a low intersection that was holding water. Before the heavy duty slotted drain system was installed this high speed intersection was allowing traffic to hydroplane in the intersection creating hazardous conditions for drivers.

 

Dura Trench slot drains are not like other slot drains on the market.  Our slot drain systems are designed to be different.  Our slot drain systems have a polymer body that will last the life of your project.  Our slot drains have built in slope as a standard feature.  Our slot drain frames have been redesigned to properly transfer loads unlike most other competitive slot drain systems.  We also manufacture our slot drain systems with the installer in mind.  Our slot drains come with rigid metal installation brackets that assist the slot drain installer with getting the slotted drain to the proper elevation and keeping it straight.  

The Dura Trench slot drain system is offered in the following sizes:  4" slot drain, 6" slot drain, 8" slot drain, 12" slot drain, 15" slot drain, 18" slot drain, 21" slot drain, 24" slot drain, and 36" slot drain.  Our slot drains are fabricated from fiber reinforced polymer concrete.  This gives the slot drain a smooth interior.  The old style corrugated metal slot drains have a rough interior that slows the flow and causes sediment build up.  The polymer slot drain is also not susceptible to corrosion like metal slot drains.  Metal slot drains corrode and eventually leak.  Most slot drain manufacturers sell non-sloping slotted drains.  While these work, the flow is slow and the slot drain gets clogged with debris.  Dura Trench slot drains can be sloped at any rate by simply specifying the starting and ending depths.  We have manufactured slot drains with throats as deep as 6 feet plus the pipe diameter.  We prefer to keep the slot drain throat closer to a 3 foot max but if you need something special we can help.  

Dura Trench also re-designed the installation process for slot drain systems.  Traditional metal slot drains require a coupler band at the joints.  This band must be installed on the slot drain once the two pieces are installed.  This can be difficult to do down in the excavation.  The Dura Trench slot drain system comes with a built-in female flange.  You simply slip the male end of the slot drain into the female end of the previous slot drain.  Most slot drain systems come with no way to install the drain because they were simply modified pieces of pipe.  This means that the slot drain throat is hard to hold on grade and alignment is also difficult.  The Dura Trench slot drain system comes with rigid metal installation brackets that accept #4 rebar.  You drive the bar into the ground, lift the slot drain on grade, and tighten the set screw to secure the slot drain at the proper height.  These metal installation brackets don't break off and they also resist the flotation that occurs when you place concrete around the slot drains.  A traditional corrugated metal slot drain acts like a boat with no way to hold the slot drain down.  One other feature that is beneficial to the installer is the reduced weight of the polymer slot drain body.  Many of the metal slot drain systems are so heavy that you must use a piece of equipment to set the sections.  The Dura Trench slot drains are light enough that two men can easily set them in place.  

The grate of the slot drain (often referred to as the frame or throat of the slot drain) was also reviewed during the design phase.  The slot drain grate is what fails on most traditional slot drain systems.  This is traditionally due to thin gauge metals, poor anchoring, and poor load transfer mechanisms on the slot drain frame.  One thing we know at Dura Trench is how to transfer a load from a grate to the surrounding concrete.  We designed heavy duty slot drain frames that can take aircraft, highway, and port duty loads.  Our heavy duty slot drain frames are thick gauge metal, have a bull nose edge protection, concrete anchors, are fully unitized, and properly transfer loads to the surrounding concrete.  Just how a heavy duty, commercial grade slot drain system should be.  We offer these frames in a variety of materials like galvanized steel, epoxy coated steel, stainless steel, and even fiberglass.  We also offer a medium duty frame for our slot drain systems.  The medium duty system is a thin profile at the surface for those architectural projects where you don't want to notice the slot drain.  These systems do not have the bull nose so they are less noticeable.  This slot drain frame allows for pavers to be installed flush with the side of the frame for an invisible look.  We don't recommend this slot drain frame for heavy traffic, but it works well for pedestrian areas and occasional vehicular traffic.

Dura Trench slot drain systems have a proven track record in a multitude of applications.  You can our slot drains in roadway projects, sea ports, airports, parking lots, driveways, curb and gutter applications, industrial sites, truck docks, breweries, food and beverage facilities, swimming pools, fountains, water parks, gas stations, and more.  Let us know if we can help you with your next slot drain project!