Threshold Drain Support

What do you know about Threshold Drain? Is that something you should have?
Don’t worry, we are here to solve your puzzle.

Threshold drainage is a drainage system, usually installed in the doorway, public pathway, or on a property. It collects and directs water to a different location to optimise the draining process. The slim design makes the threshold drain suitable for patios, pathways, walkways, door threshold, and block paving areas.

Unlike the traditional method such as the clay dish channel (see image below), the threshold drain comes with a grating top that covers the recessed area (see image below). Therefore, it provides a safe environment for pedestrian, especially beneficial for people with restricted mobility; also creates a beautiful profile that matches the area.

A clay dished channel drain between the road and pavement.
Alusthetic Threshold Drain Installed With Grey Aluminium Grating In Rear Grass Garden
A finlish look of an anodized aluminium silver grating threshold drain installed in a rear grass garden.

Threshold Drain Features

  • Easy to install
  • Simple connection to a standard underground drainage outlet
  • Removeable heel guard
  • Fully compliant and certified to load class A 15 BS EN 1433:2002
  • Disabled access friendly

Why Aluminium

Other than aluminium, there is a type of threshold drain out there that is made from galvanized steel. Although galvanised steel also does the job, the surface is rough. Which makes it more difficult to clean and increase the chance of stains. Therefore, galvanized steel is usually used at places like industrial buildings. Whereas aluminium is light weighted; corrosion-resistant; has a higher thermal conductivity; and with a modern, aesthetically pleasing profile. As a result, aluminium will give you a longer-lasting threshold drain, since it is less sensitive to wear and tear.

Consideration Before Purchasing

A poor-quality drainage system could cause a lot of problems, such as floods or property damage. While traditional drainage can help with water flow, threshold drain also acts as a barrier, providing superior drainage. Could threshold drain be the best solution for your specific drainage needs?

  1. Overflow
    Threshold drain is designed to channel up to 40 litres of water per minute. You should be mindful of the flow rate in order to lower the risk of potential overflow.

  2. Threshold Level
    It should be noted that the threshold drain should be installed 3mm to 5mm below the touching paving level. The depth will give the rainwater enough space to drain. Even in heavy rain condition, they won’t flood above the paving.

  3. Pair Up
    If your domestic drain is unable to handle the increased flow rate, you can direct the threshold drain to another drainage system. We recommend combining an Alusthetic aluminium threshold drain with a soakaway crate.

    The soakaway crate would collect the water and distribute them slowly and evenly to the ground. Please beware of the crate location, underneath the surface has to be soil for the system to work.

Threshold Drain Accessories

With the natural shape of the threshold drain, it is difficult to build a complete drainage system on its own, especially in a small area. Therefore, we recommend our customers use some, if not all of our threshold drain accessories, in order to create the best drainage route.

Alusthetic Corner Unit
Just as the name intended, this corner unit helps the drain turn corners or goes to another angle.

Alusthetic Tee Piece
Similarly, the tee piece helps the drain to change the angle, and gain extra access for additional drainage design. Wherefore increase the performance of the drainage system.

Including the threshold drain, both corner unit and tee piece comes in three profiles. With silver and black being anodized aluminium and a steel CorTen.

Alusthetic corner units with 3 options

CorTen features a rusty characteristic after making contact with rainwater. During this formation, rainwater may catch that rusty brown colour, which causes by patina (an oxidation layer that stops metal from future corrosion), and potentially stain the materials around. In this case, there are 2 things you can do.

Pick a safe area, and allow the CorTen threshold drain to corrode before application.

Install the threshold drain 3mm to 5mm lower than the surface level.

Alusthetic Bottom Connector
This Alusthetic bottom connector helps to connect two threshold drains together smoothly. Creates a sturdy base for rainwater to pass through. In addition to this, the bottom connector also helps to reduce the chance from pooling at external door; prevent additional drainage.

The bottom connector comes in two versions, with and without an outlet at the bottom. The with outlet version allows connectivity to the drainage pipe below.

Alusthetic Channel 50mm Outlet End Cap
The name is pretty explanatory, this Alusthetic channel end cap is to cap the threshold drain system at either end. Same as the bottom connector, Alusthetic channel end cap also have with outlet option available.

Click here to view and purchase all the mentioned items.

Alusthetic bottom connector with or without outlet
Alusthetic end cap with or without outlet

We hope this post will help you understand more about threshold drain and its pros & cons. If you are still not sure, give us a shout, we are more than happy to answer all the questions you may have.

Thank you for reading 🙂

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