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When is Drainage Excavation Necessary?

When is Drainage Excavation Necessary

It’s time to set the scene. You’re dealing with problematic, recurring blocked drains. Water isn’t flowing properly and all the usual DIY methods just haven’t worked. That’s why you’ve called in the professionals.

Sadly the solution isn’t going to be a quick fix. For whatever reason, the pipes cannot be repaired, or the blockage cannot be removed. So what does that mean? Well, the pipes have to go. They have to be dug up and replaced to ensure long term health and safety with an efficient drainage system.

If drainage excavation is on the cards and you’re left with a few lingering questions, Jim’s Plumbing is here to help. We’ll take you through some of the most common questions surrounding stormwater and sewer drain excavation.

In a few short minutes, you’ll have all the answers!

So, What is Drainage Excavation?

When your pipes are blocked and there’s no alternative form of repairs, your plumber will have to dig deep. Literally. Drain excavation involves digging up damaged or blocked pipework and replacing it with brand new PVC piping.

Excavation is only necessary when pipes are damaged beyond repair and cannot be fixed with a non invasive measure. It can be a big process at times, as not all jobs are uniform, but it comes with long term success.

Any offending tree root blockages can be safely removed. Pipe replacement also ensures any potential risk factors are 100 per cent taken care of.

Is it the Same for Sewer and Stormwater Drainage Systems?

Yes! Both stormwater and sewer drainage pipes can be repaired in the same way. There are no unique requirements, other than maintaining structural integrity and quality performance.

How Far Underground Do You Dig?

The good news is drainage excavation rarely has to go too deep. That means you won’t be staring at trench lines that seem to stretch into the centre of the Earth.

In reality, most sewer lines are at least 450mm deep. On average expect it to be about 600mm, and at worst a deep dig would be about 1000mm. So unless the conditions are wildly abnormal, your plumber won’t be going too far past one metre.

However, there are exceptions, especially in older homes. Previous DIY work might not match up to modern standards. There could easily be some wild variations that pose a challenge to even the best plumber.

Concrete foundations, surrounding tree roots or other underground structures might mean the excavated depth is deeper – or wider – than planned. Regardless, if there are any issues you can count on your local plumber to tackle the problem in the most efficient way.

Is Drain Excavation Better Than Pipe Repairs?

In terms of drainage excavation vs hydro jet drain cleaning and/or pipe relining, there is no winner or loser. The best solution is the one that best solves all of the problems at hand.

If that’s using a hydro jet to break apart tree root blockages, and pipe relining to provide a new inner layer, so be it! But if the pipes are cracked beyond repair and water is leaking into the soil, then it’s time to dig and replace them.

Will Excavation Damage My Garden?

There’s no denying that excavation will impact how any garden looks. Flowers may need to be dug up, concrete cut open, and pavers moved. Sadly you will have to disrupt a pristine surface area to get to the bottom of the damage.

However, that doesn’t mean the garden itself will be damaged. Any good plumber or tradesperson will take their time to ensure everything is neatly performed. They’ll look after your property and stay away from delicate flora when possible.

Often the finished product will look just like it was, too. No one will even know there was any construction or disruption to your home.

What is the Long Term Success?

Rest assured that drainage excavations come with the promise of long lasting success. How long? One hundred years.

PVC pipes are incredibly durable, and on average will last 100 years. They can easily replace existing materials such as clay pipes or can slot into any existing section of PVC piping. If you are looking at sewer or stormwater pipe replacement, PVC will be the perfect option for continued success.

How Much Does it Cost?

Given the range of factors that influence any pipe repairs, it’s difficult to provide one fixed price quote for excavation.

The length of pipe required, depth of digging, potential trench shoring and equipment hire will all influence the final cost. Typically, that will also only be known after an initial CCTV drain camera investigation.

One key piece of advice is this: be prepared for a more expensive job. Excavation can often be a 1-2 day job with multiple hands on deck. It’ll be intensive and thorough, but in the end you’ll have said goodbye to any damaged pipes.

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