Custom Underground Gutter Drainage Solutions

An underground gutter is designed to prevent soggy soil, keeping lawns and produce healthy….  The basic design of an underground gutter is a PVC underground downspout drain at the bottom of a gravel trench using gravity in its favor to collect and drain water. Where to dig the trench, what quality of gravel to use, and other details depend on the demands of the situation.

Successful Underground Gutter Drainage Guidelines

underground gutter drainage agricultural drain

Soil Moisture Requirements

While the foundation of a building is safest in dry soil, agricultural drainage must facilitate the preferred moisture level for the surrounding produce. While peppers and squash thrive in dry soil, peppermint and rice require muddy conditions to flourish. There are certain tools that can drain excess water while retaining a specified moisture level to the benefit of the produce.

The effectiveness of drainage is determined both grain size and thickness. Clay absorbs water while sand is more hydrophobic. Drainage trenches are generally filled with gravel pieces between 10 and 20 millimeters thick. Larger grains facilitate faster drainage. In some cases, soil is used in order to slow down the drainage and keep the surrounding area moist.

Unlike in agricultural drainage, it is vital that the soil surrounding a building remain dry. The underground downspout must always be pointed away from the foundation of any building, and should not be built less than a meter away.

Water Pooling Prevention

Proper engineering is required in gutter drainage installation in order to avoid problems later on. With 500 pounds of gravel blocking the way, it can be difficult to diagnose issues with the underground PVC pipes, so it is best to prevent them through careful planning.

One common mistake is to place the pipe output where water might pool, such as next to a rain gutter output. If water pushes its way up the pipe, it fills the trench, developing water pockets and causing the soil to grow soggy. In other words, if water flows the wrong way, the drainage trench becomes a water retention pond, and this can be extremely detrimental to the surrounding flora.

Another common mistake is creating gaps that will eventually turn into water pockets. Over time, the smallest water pocket may grow and eventually cause problems. The pipe must be installed at the base of the trench with no room for water to pool beneath it. It must be slotted to allow water to enter from all angles. Only proper installation will prevent problems from occurring.

One water pooling problem that develops over time is pipe blockage. As soil fills gaps in the pipe, the water flow is slowed. To keep the pipe clear of debris, a geofabric filter, or sock, is often installed over the pipe. The same material can be used to create a geofilter over the top of the trench, covered by a thin layer of gravel. The added benefit of this upper geofilter is that it’s easier to replace. It may not catch all the dirt, but it can be swapped out if it becomes ragged over time.

Additional Notes

To prevent damage from trucks, tractors, and heavy equipment, the drainage pipe must be buried beneath 2 feet of gravel or settled soil. If pesticides are used, letting flora grow over the top of the trench will help absorb the chemicals and prevent them from spreading into the local environment.

To have your underground gutter drain installed or modified, please reach out to Specified Fittings.


Stormwater Management: Beat the Rain at its Own Game

Left to its own devices, rainfall can be a costly and destructive force on a property. By flagging problems and fixing them early, a property owner can save thousands on property damage. Stormwater management is summarized into three easy steps:

1. Identify the problem.

2. Install the solution.

3. Move on.

With the right parts in place, you will never have to think about the problem again.

catch basins with multiple inputs and outputs

1. Identify the Problem

The cause of a problem is never too far from the evidence. Just ask yourself, “Where is the water going?”

Broken-Down Materials

Oftentimes, a drainage system will work for years or decades before falling into decay. This is often due to outdated materials. Metal may appear hardy but will give in to corrosion and rust after years of use. Cheap and light plastics break down under the weight of heavy rainfall, especially when the drains become cluttered with debris. These parts must be swapped out with PVC or HDPE: reliable, water-tight materials that last longer than the alternatives

Water Pooling

Large land spaces require occasional maintenance over the years as water begins to pool in different areas. Golf courses, parking lots, highways, ball fields, and business fronts are common places for water-pooling issues to come up. New drainage devices must be installed to help with the target areas.

Debris Buildup

If not properly installed, stormwater drains become stuffed with dirt, pine needles, and trash. These systems can be modified or replaced to include snouts, clean-outs, and valves to manage the debris and prevent clogging.

2. Install the Solution.

Once the problem is identified, all that’s left is to replace what’s broken. The replacement parts must fit the exact parameters of the existing system, form a water-tight connection, and withstand the environmental factors of the area. In some cases, the parts can be purchased at local department stores, but when a unique part is needed, it must be built-to-spec. This is Specified Fittings’ forte.

Catch Basins

Our catch basins can be built to any parameters between 6″ and 48″ (12″ wider than most competitors offer). We recommend either SDR35 or Sch40: sturdy, high-quality materials that most piping companies don’t have access to. Our catch basins are designed with internal snouts to expel debris.

Downspout Adaptors

When two pipes of different dimensions must interconnect, this is where an adapter comes in. No matter the shape or material, so long as the diameters fall between 3″ and 12″, Specified Fittings can build it.

Custom Structures

custom pipe fitting

The Specified Fittings CAD team will design and build what you need, making use of the latest technology to make your drainage clean, efficient, and reliable. We may make use of notches, weirs, gates, valves, clean-outs, shear gates, and snouts to create the piece that meets your needs.

3. Move on

A lot of factors go into installing a stormwater management system, but the best solution is a final solution. Once installed, the drainage system will keep doing what it does best.
If you require special parts, go to the experts with access to the highest quality materials and manufacturing tools. See more info on our stormwater management solutions.