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Subsoil Drainage

A subsoil drain is a drainage system that is installed to remove excess water from the surrounding soil around homes, garages, retaining walls and basements.


What are some common problems arising from poor subsoil drainage?

Your Pro Plumber has plenty of experience improving a property’s subsoil drainage. We’ve likely experienced (and fixed) any issues you might have. Common problems we see are:

  • Water leaking through retaining walls
  • Water leaking into basements
  • Wet and muddy lawns
  • Water pooling on the ground when it rains

If you’re experiencing any of these problems in your home, contact Pro Plumber for a free quote to get it fixed in no time. Scroll down and read through a bunch of helpful tips and insights and some of the issues you might experience.

Subsoil drainage basics

A subsoil drain is a drainage system that is installed to remove excess water from the surrounding soil around homes, garages, retaining walls and basements.

The perforated or slotted pipes are placed underground and are usually covered by geotextile material to stop soil from entering it. Ground water enters the pipe works and is taken away into the stormwater network servicing your property.

What are the benefits of subsoil drainage?

Having these types of water controlling drainage systems installed in your home is common practice. There are many exceptional benefits that come with subsoil drains:

  • Excess water entering the landscape/ building is decreased extremely
  • The amount of salinity (salt) present in the soil is lessened
  • The soil is overall strengthened allowing it to be healthier
  • Aeration of the soil is increased, meaning healthier plants and grass overall
  • Mixed with fertiliser, when the soil is drained of excess water, your garden will produce higher quality fruit, vegetables, flowers and plants
  • Structural damage to the home is drastically decreased, specifically walls and landscaping, as water doesn’t enter their range
  • The stability of the ground is also improved, helping with the building foundations not moving due to soil moisture

Creating effective subsoil drainage will give longevity to your home and provide for a more healthy environment. It’s a long-term solution that will pay for itself for years to come.

Types of subsoil drainage systems

The most common and most effective type of subsoil drain is when geotextile material is applied to special pipes. This type of pipe has many different attributes and characteristics which allow water to seep through efficiently. It allows for the highest flow of water to be removed from the site, decreasing the potential water damage. 

Moreover, the geotextile material serves to limit the amount of soil entering the pipe. The chance for blockages is decreased by preventing soil and other smaller particles from entering the pipe, allowing it to better remove water.

Other main types of subsoil drainage include:

  • Mole drainage – mainly used for places that experience heavy amounts of rainfall
  • Groundwater pumps – for places near streams and alike to ensure the excess water does not enter the area
  • Subsurface pipes – similar to subsoil 
  • Interceptor drains – usually used when water is constantly in the soil. it targets to collect and remove the water


Installing subsoil drainage

A qualified plumber can determine which type of subsoil drainage is best suited for the area it will be installed in. Factors such as the land area, average rainfall and the type of soil are considerations we need to take into account.

This isn’t the kind of project you should do yourself. Incorrect subsoil drainage can actually make the problem worse and you should engage a fully certified plumber to ensure you have the most effective and long-lasting subsoil drain system.


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With years of renovation and new home build experience, Pro Plumber are your go-to for home plumbing installation. Kitchens, bathrooms, laundries, gardens.

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Yuck! Not only does rising damp make for a very sick house and inhabitants, if left for too long it can become a very costly problem to fix. It's best to get onto this before you have to sell a kidney to save your house.

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There's nothing more satisfying for a Pro Plumber than repairing an existing pipe and saving our customers money they might have otherwise been encouraged to spend by someone suggesting entirely new pipes.


You know the coolest thing? Being able to water your garden without having to lift a finger! Even better, is controlling it with your phone. Ask us how we can automate your watering system.

Subsoil Drainage

Keeping water away from your house, especially under it, is actually way more important to the health and safety of a property than most people think. It's a dirty job but someone's gotta do it.

Annual Inspection

Preventing problems BEFORE they occur is the name of the game here. If you sign up to our annual inspection program, we can keep on top of issues before they become costly.

Rainwater Harvesting

Rainwater tanks are compulsory for all new home builds and there are two main reasons why - they save us money and reduce the burden on the local water system and helping the environment.


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I called Chris from Pro Plumber for a quote to fix my blocked toilet. He was at our place the same afternoon and fixed the toilet in no time at all. He then offered a free inspection of the rest of my bathroom plumbing and found an issue with the drainage system. We booked in a return visit within days and he fixed that too. Such a great service and not as expensive as I thought it would be.

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