What are the options for trench drains?

Author: Prof. Casey Fay  |  Last update: Saturday, July 5, 2025

Two main types include the concrete trench drain and the high-density polyethylene (HDPE), or polymer, trench drain.

What is the alternative to trench drains?

Swale Drain System

Swale drain systems are lesser known surface systems that are more broad and shallow than trench drains, making them a more subtle option. A swale drain is essentially a ditch that gets covered or lined with either grass or another type of vegetation.

What is the best material for a trench drain?

In some cases, the materials chosen matter greatly, with some better suited than others or required by law. One universally accepted material is stainless steel, which is safe for many applications. As a result, stainless steel trench drains have become one of the best types of drainage systems.

Does trench drain have to be in concrete?

The ditch is the area in which the trench drain is poured. Concrete, dirt, gravel asphalt can be used.

What are the three types of underground drainage systems?

There are 4 main types of subsurface drainage systems:
  • corrugated and PVC slotted subsurface pipes.
  • mole drainage (including mole drains, mole drains over collector pipe systems and gravel mole drains)
  • interceptor drains.
  • ground water pumps.

The Ultimate Guide to Trench Drain Systems

What are the different types of trench drainage systems?

As discussed, there are two major groups of trench drains. Polymer Channels and Concrete Channels. Polymer based channels can come in the form of hdpe (high density polyethylene) or fiberglass. Concrete based channels can come in the form of fiber reinforced concrete or polymer concrete.

What is an interceptor drain?

Drainage interceptors or drain separators are a defence to stop contaminants from entering surface water drains. Also referred to as petrol interceptors or oil separators, they are tanks installed within drainage pipework designed to collect and keep hold of contaminants.

Where does water go in a trench drain?

The primary function of trench drains is water management. These structures gather and move rainwater to a drain or another outlet, preventing water from building up. This function is crucial for maintaining dry and safe surfaces, reducing the risk of slips, flooding, and water damage.

What is the difference between a trench drain and a French drain?

Aside from what we've listed here, the difference between a French drain and a trench drain is that a French drain is used for water that is underground while a trench drain diverts excess water from a surface.

What are the disadvantages of trench drains?

TRENCH DRAIN CONS:

Heavy forklifts and other equipment can damage the grates. High flow rates into the drain can result in splashing, causing contamination. The wider opening, though covered by a grate, can create a tripping hazard.

Do trench drains need P traps?

Conclusion. P-traps assume an indispensable role in the efficient operation and safety of trench drain systems. By effectively acting as barriers against foul odors, sewer gases, and potential contaminants, P-traps ensure a healthy, odor-free environment while preventing the spread of harmful substances.

Are trench drains expensive?

Radius Trench Drain

This is a complex drain design that allows the drain to follow a curve in a walkway or around something like a fountain. This kind of drain is usually about 2” to 24” in width and can be ornamental or plain. This drain type will typically cost anywhere from $30 to $150 per installed foot.

Do trench drains get clogged?

This part of drain maintenance is most commonly required for business locations, but even residential trench drains need to be cleaned out a few times a year on average. When trench drains are not cleaned up regularly, they can get clogged and lead to standing water or even damage to the drain system itself.

What is an alternative to trenching?

Directional drilling, also known as horizontal directional drilling (HDD) or directional boring, is a trenchless method that involves drilling a pilot hole along a predetermined path, followed by enlarging the hole to accommodate the utility conduit, which is then pulled through the opening.

What is the French drain option?

A French drain is a practical solution for managing water around your property, especially in areas prone to heavy rain and water accumulation. This drainage system helps prevent issues like standing water, soil erosion, and even basement flooding by redirecting water away from vulnerable areas.

Do you need concrete under a trench drain?

Backfill the Trench With Concrete

To ensure the drain channel is secure, you want to do this process in two steps: first, floating the channel 1/16-inch below the first layer of concrete. Then, once it has set, backfill the rest of the trench with at least 4-inches of concrete on both sides.

Do trench drains need to be vented?

Continuous trench drains for gas or oil discharges shall have a trapped and vented opening no less than every 40 lineal feet. Intermittent trench drains shall be treated as individual floor drains and shall meet the trap and venting requirements for floor drains.

How long does a trench drain last?

A properly designed trench drain will last for 25-50 years or longer. The wrong trench drain will often fail in 2-5 years, and sometimes, even sooner.

Do you need to slope a trench drain?

The slope of the drain makes sure that the drain can work effectively, and it prevents issues with pressures on the trench that can lead to its failure. The outlets on the channel will need to point in the direction of the water flow, and the outlet end will need to be placed at the end of the slope of the drain.

What is a soakaway?

A soakaway consists of a hole dug in the ground and filled with rubble or plastic crates. It provides a solution to excess surface water by letting it slowly drain and soak into the ground instead of build up.

What are the different types of trench drains?

Here's an overview of the different varieties:
  • Cast Iron and Ductile Iron Trench Grates. ...
  • Stainless Steel Trench Grates. ...
  • Stone Trench Grate System. ...
  • Concrete Trench Grates. ...
  • Linear Trench Drain Grates. ...
  • Plastic Trench Grates. ...
  • Fibreglass Trench Grates. ...
  • Aluminium Trench Grates.

What is a stealth drain?

The Amerimax Stealth Drain Low Profile Catch Basin allows you to move damaging rainwater away from your home with the look of a buried drainage system, without the cost. The low profile design creates an unobtrusive look and can be covered with mulch, straw or stones for a subtle appearance, with no digging required.

What is a blackpool trap?

Drainage Interceptor Traps

They come in many shapes and sizes and the same shape of trap may be known as a Bristol trap or a Blackpool trap and no doubt a Great Budworth trap if that's the part of the country you are in.

What is a chase drain?

A chase drain is a metal drain placed within the sidewalk to direct water flow through the sidewalk instead of over it.

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