Tree Roots Blocking Pipes: Effective Solutions for Pools

Your pool area may look beautiful, but frequent drain backups nearby could be causing you frustration. In the Sutherland Shire and southern Sydney, our investigations using advanced camera technology in blocked sewer or stormwater lines adjacent to pools often reveal invasive tree roots that have penetrated the joints of older pipe systems.

Resolving a blocked pool drain does not always require lifting pavers or excavating your garden. This article explores the causes of blockages, the techniques we employ to identify them, and how pipe relining offers an effective solution by addressing the problem from within the pipe itself.

Understanding the Drainage Systems Beneath Your Backyard Pool

In many Sydney backyard pools, the surrounding area is often paved, tiled, or decked and may include retaining walls and garden beds. Underneath this hardscape, you will typically find several key drainage lines:

• The household sewer line
• Stormwater drainage systems that collect water from the roof, paving, and pool surroundings
• The pool’s backwash line
• Overflow drains and subsoil drainage systems

It is important to note that the pool’s filtration pipework, which connects the pump, filter, skimmer box, and return jets, operates under pressure and is distinct from the drainage systems. This discussion focuses on the drainage lines, which are particularly vulnerable to intrusion by tree roots.

How Can Tree Roots Cause Blockages in Pool Drains?

Tree roots are naturally attracted to moisture sources, and even a small leak at a pipe joint can entice them. Roots from trees several metres away can extend towards a cracked joint in older terracotta, earthenware, or PVC pipes. Once a small root finds its way inside, it thrives in the moist environment within the pipe, trapping waste and debris, and eventually leading to a blockage.

When a drain near the pool becomes blocked, the backwash water has nowhere to go, potentially causing flooding on the pool deck. If the blockage occurs in the sewer line, it can result in backflow in showers, toilets, and floor wastes inside the house.

If you are landscaping around a new pool, consider checking our guide on suitable tree species to plant to avoid blocked drains. This guide includes information on trees that are safer to position near pipework.

What Signs Indicate a Blocked Pool Drain or Stormwater Line?

Be vigilant for the following signs around your pool and within your home:

• Pool water drains slowly or backs up during backwashing
• The backwash line overflows
• Water bubbles up through a garden drain or grate
• A sink or shower produces gurgling sounds when the pool is being backwashed
• Water collects on the pavers or lawn adjacent to the pool

Each of these symptoms suggests a potentially blocked or damaged pipe underground, and a camera inspection will help us pinpoint the issue accurately.

Why Is Digging Around a Pool Not the Best Approach?

Gaining access to the drainage around a pool can be a challenging task that often results in damage. Accessing a pipe typically involves lifting travertine or granite pavers, cutting through concrete slabs or retaining walls, or removing garden beds, turf, or decking. Once the pipe is repaired, restoring the paving and landscaping can be extensive and costly.

This is why we prefer relining methods over excavation. In the case highlighted below, relining allowed us to navigate around steep stairs and an established garden without causing disruption.

Case Study: Successful Pipe Relining Solutions Near a Pool in Sutherland Shire

A homeowner in the Sutherland Shire contacted us regarding three significant issues in their backyard:

• A blocked stormwater line next to their in-ground pool
• Gurgling noises coming from the back garden
• Water pooling in a tiled corner

Our CCTV drain inspection revealed extensive root intrusion from a nearby tree, cracks in an old earthenware line, and multiple blocked junctions located approximately 3 metres beneath the pavers.

The accompanying images illustrate the situation: the first shows the blocked pipe before intervention, while the second depicts the same pipe after the relining process.

Instead of suggesting excavation, we took the following steps:

1. We cleared the line using high-pressure hydro jetting and root-cutting tools.
2. We installed a resin liner throughout the damaged section to seal the cracked junctions and joints.

The stormwater line was restored to optimal flow, with no disturbance to the pavers or garden beds. The entire process was completed in under six hours.

How Does Pipe Relining Work Without Excavation?

We implement a method known as cured-in-place pipe relining. A resin-soaked liner is inserted into the damaged segment of the pipe, pressed against the interior surface, and allowed to cure, effectively forming a new pipe within the old one. This procedure seals any cracks, leaking joints, and entry points exploited by tree roots. We access the pipe through an existing entry point, such as an inspection opening, ensuring that the surrounding pavers and garden remain undisturbed.

Our skilled team manages every aspect of the relining process, from the initial camera inspection through to the final stages, without involving subcontractors. For more information about the procedure, please visit our pipe relining Sydney page.

When Is Pipe Relining Not Suitable for Pool Drain Repairs?

Pipe relining is appropriate for pipes that are damaged but still retain most of their shape. If a section has collapsed to an extent that a liner cannot be inserted, that portion will require excavation and replacement. Similarly, if a section has sunk and lost its gradient, the liner will follow the dip, leading to stagnant water, which necessitates the reinstallation of the pipe at the correct slope.

Occasionally, our camera inspections reveal that roots have infiltrated the Sydney Water main rather than your private pipes. In such cases, the responsibility for repairs lies with Sydney Water, and we provide the footage needed to facilitate the reporting process.

Frequently Asked Questions About Blocked Pool Drains

Can the Drain Pipes Surrounding a Pool Be Relined?

Absolutely. We can reline the sewer and stormwater pipes located beneath pool surrounds, provided the pipe maintains its shape. A camera inspection is conducted initially to assess the damage and confirm that a liner can be installed. If any sections have collapsed or sunk, those areas will need to be excavated and replaced.

What Techniques Are Used to Clear a Blocked Pool Drain Without Excavation?

We eliminate blockages using high-pressure hydro jetting and root-cutting tools. After this, we inspect the pipe with a CCTV camera. If the camera detects cracked joints or root entry points, we can install a resin liner from within the pipe through an existing access point. This repair effectively seals the damage without the need to lift pavers, cut slabs, or disturb the garden.

What Are the Common Causes of Blocked Drains Around Pools in Sydney?

Tree roots are a primary cause we encounter around pools, especially in older terracotta and earthenware pipes. Roots infiltrate joints that leak water and continue to grow until they trap debris. A camera inspection will help determine the specific cause of the blockage in your drain.

Who Is Accountable for Removing Tree Roots from a Sewer Pipe in Sydney?

The property owner is responsible for their own pipes. According to Sydney Water’s guidelines on repair responsibilities, the owner must also clear tree roots that invade the junction at the connection point. If our camera footage reveals that the roots are within the Sydney Water main, the responsibility for repairs lies with Sydney Water, and we will provide the necessary footage to report it.

How Long Does Pipe Relining Take Near a Pool?

The relining project in Sutherland Shire mentioned in this article was completed in under six hours, which included root clearing and lining of the damaged section. The duration for your drain will depend on the extent of the damage, the number of joints requiring sealing, and the accessibility of the entry point. We will provide you with a timeline following the camera inspection.

Schedule a CCTV Inspection for Your Blocked Drain Near the Pool

We aim to determine a method for repairing the drain from within the pipe before considering excavation, and we will show you the camera footage prior to commencing any work.

If you notice signs of a blocked drain near your pool, arrange a CCTV inspection or contact The Blocked Drain Guys at 0418 408 333. Craig or one of our team members will explain the inspection process and outline what we will be looking for.