While your pool area may look beautiful, you might be facing persistent drain backups in the vicinity. In the Sutherland Shire and southern Sydney, our investigations using advanced camera technology on blocked sewer and stormwater lines close to pools frequently reveal invasive tree roots that have penetrated the joints of older pipe systems.
Resolving a blocked pool drain doesn’t always require removing pavers or digging up your garden. This article explores the underlying causes of blockages, the methods we employ to identify them, and how pipe relining offers an effective solution by fixing the issue from within the pipe itself.
Understanding the Drainage Systems Underneath Your Backyard Pool
In many Sydney backyard pools, the surrounding area typically consists of paving, tiles, decking, retaining walls, and garden beds. Beneath this hardscape, you will commonly find various drainage lines:
- The household sewer line
- Stormwater drainage systems from the roof, paving, and pool surroundings
- The pool backwash line
- Overflow and subsoil drains
It’s essential to recognise that the filtration pipework of the pool, which connects the pump, filter, skimmer box, and return jets, operates under pressure and is different from the drainage systems. This discussion focuses on the drainage lines, which are particularly vulnerable to tree root invasion.
How Do Tree Roots Cause Blockages in Pool Drains?
Tree roots naturally seek out sources of moisture, and even a small leak at a pipe joint can attract them. Roots from trees several metres away can extend towards a damaged joint in old terracotta, earthenware, or PVC pipes. Once a small root infiltrates the pipe, it thrives in the moist environment, collecting waste and debris, and eventually leading to a blockage.
When a drain near the pool becomes blocked, the backwash water has no outlet, potentially resulting in flooding on the pool deck. If the blockage occurs in the sewer line, it can cause showers, toilets, and floor wastes inside the house to back up.
If you are landscaping around a new pool, refer to our guide on suitable tree species to plant in order to prevent blocked drains. This guide provides insights into trees that are safer to position near pipework.
What Signs Indicate a Blocked Pool Drain or Stormwater Line?
Be vigilant for the following indicators 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 emits gurgling sounds when the pool is being backwashed
- Water accumulates on the pavers or lawn adjacent to the pool
Each of these symptoms suggests a potential blockage or damage within the underground pipes, and a camera inspection will help us accurately locate the issue.
Why Is It Better to Avoid Excavation Around a Pool?
Accessing drainage around a pool can be a challenging task that often results in damage. Reaching a pipe typically involves lifting travertine or granite pavers, cutting through concrete slabs or retaining edges, or removing garden beds, turf, or decking. After repairing the pipe, restoring the paving and landscaping can be extensive and expensive.
This is why we prefer relining methods instead of excavation. In the case illustrated 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 about three significant issues in their backyard:
- A blocked stormwater line next to their in-ground pool
- Gurgling sounds 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 prior to intervention, while the second depicts the same pipe after the relining process.
Instead of suggesting excavation, we took the following actions:
- We cleared the line using high-pressure hydro jetting and root-cutting tools.
- We installed a resin liner throughout the damaged section to seal the cracked junctions and joints.
The stormwater line was restored to its optimal flow, with no disruption to the pavers or garden beds. The entire procedure was completed in under six hours.
What Is the Process for Pipe Relining Without Excavation?
We use a method called cured-in-place pipe relining. A resin-soaked liner is inserted into the damaged section of the pipe, pressed against the interior surface, and left to cure, effectively creating a new pipe within the old one. This process 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 untouched.
Our dedicated team manages every phase of the relining process, from the initial camera inspection to the final stages, without subcontractors. For more information on the procedure, please visit our pipe relining Sydney page.
When Is Pipe Relining Not Suitable for Pool Drain Repairs?
Pipe relining is effective for pipes that are damaged but retain most of their shape. If a section has collapsed to the extent that a liner cannot be inserted, that segment will need excavation and replacement. Similarly, if a section has sunk and lost its gradient, the liner will follow the dip, resulting in stagnant water, necessitating the reinstallation of the pipe at the correct slope.
Occasionally, our camera inspections indicate that roots have invaded the Sydney Water main instead of your private pipes. In such cases, the responsibility for repairs falls to Sydney Water, and we provide the footage necessary 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 first to assess the damage and ensure a liner can be installed. If any sections have collapsed or sunk, those areas will require excavation and replacement.
What Techniques Are Used to Clear a Blocked Pool Drain Without Excavation?
We eliminate the blockage using high-pressure hydro jetting and root-cutting tools. Afterward, we inspect the pipe using a CCTV camera. If the camera identifies 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 Common Factors Cause Blocked Drains Around Pools in Sydney?
Tree roots are a primary cause we encounter around pools, especially in older terracotta and earthenware pipes. Roots penetrate joints that leak water and continue to grow until they trap debris. A camera inspection will help identify the specific cause of the blockage in your drain.
Who Is Responsible 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 regarding repair responsibilities, the owner must also clear tree roots that invade the junction at the connection point. If our camera footage shows 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, as 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 length of the damaged area, the number of joints needing 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
Our goal is to find a method for repairing the drain from within the pipe before considering excavation. We will show you the camera footage prior to commencing any work.
If you notice signs of a blocked drain near your pool, arrange for 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 what we will be looking for.
Original Article First Published At: When Tree Roots Block Pipes Around Your Pool — And How to Fix It Without Digging Up Your Garden
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