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Tankworld Trade - 02 December 2025

3 Common Builder Mistakes in Water Tank Selection (How to Avoid Them)

The 3 Most Common Mistakes Builders Make When Selecting Water Tanks

Choosing the right water tank is an important part of many building projects – from new-home construction and BASIX requirements to rural properties and commercial developments. But even experienced builders sometimes overlook key details when specifying a tank, which can lead to delays, compliance issues, or unhappy clients.

Below are the three most common mistakes builders make when selecting water tanks – and how to avoid them using simple planning and trade-smart choices.

1. Choosing the Wrong Tank Size for the Property’s Needs

Overview of Tank Types and Sizes

One of the biggest and easiest mistakes is selecting a tank size that doesn’t match the property’s purpose, rainwater catchment area, or regulatory requirements.

Common problems that occur:

  • The tank is too small to meet BASIX or council compliance
  • Homeowners run out of water too quickly
  • The tank doesn’t hold enough for garden or irrigation plans
  • Rural builds underestimate livestock or fire-prep demand

How to avoid it:

Builders should always consider:

  • Roof area & rainfall (to estimate harvest volume)
  • Expected water usage (garden, home, livestock)
  • Local regulations/BASIX
  • The space available for installation

Tankworld offer a wide range of capacities and footprint options, so selecting the correct size early prevents rework later.

2. Not Checking Pump Compatibility Early Enough

3 x 23,650l Water Tank and Tankworld pump

Another common issue is choosing a tank before confirming which pump and filtration system it will pair with – leading to layout problems, installation delays, or unexpected extra costs.

What this causes on-site:

  • The pump is located too far from the tank
  • Incorrect pressure for household plumbing
  • Electrical setup not accounted for
  • Access issues for maintenance

How to avoid it:

Builders should ideally choose tank-and-pump combinations together. Most trusted manufacturers, including Tankworld, clearly list recommended pump kits. Planning both at the same time ensures:

  • Correct plumbing pressure
  • Faster installation
  • Cleaner integration with household systems

3. Forgetting About Access & Installation Clearance

Even when the correct tank is chosen, builders sometimes underestimate the space needed for safe positioning, base preparation and installation.

Common access issues include:

  • The tank doesn’t fit down the side of the house
  • Landscaping blocks access after framing
  • Tight driveways prevent delivery trucks from entering
  • No level base was prepared beforehand

How to avoid it:

Early site planning is key. Builders should check:

  • Gate width
  • Side pathways
  • Base preparation (sand or crusher-dust pad)
  • Delivery truck access
  • Plumbing outlet orientation

Good forethought avoids last-minute redesigns or heavy repositioning. Check our full delivery information here

How Builders Can Avoid All 3 Mistakes: Choose Trusted Australian-Made Tanks

Selecting tanks from reputable manufacturers like Tankworld ensures builders get:

✔ Clear installation guidelines
✔ Properly positioned outlets & inlets
✔ Strong, durable, UV-stabilised Australian-made materials
✔ Tank-and-pump pairing options
✔ Reliable delivery
✔ Predictable outcomes on site

Builders who work with known brands spend less time troubleshooting and more time finishing jobs efficiently and professionally.

👉 For fast trade quotes and reliable delivery, contact Tankworld Trade today.

Builders get access to exclusive pricing and streamlined ordering.

https://youtu.be/nqQQ4Z52j0E

FAQ – Builder Mistakes & Best Practices

1. What’s the biggest mistake builders make with water tanks?

Choosing the wrong size or shape for the property and compliance needs.

2. Should builders choose tank and pump packages together?

Yes. It ensures proper plumbing pressure and layout, and easier installation.

3. How important is tank placement planning?

Critical. Access, base preparation and outlet positions must be planned before slab or landscaping begins.

4. Do Australian-made tanks perform better?

Yes. They are built for local UV exposure, temperature changes and compliance requirements.

5. How does Tankworld Trade help builders avoid mistakes?

By offering trade pricing, product support, and fast delivery directly from our manufacturing sites.

Author Bio

Written by Diana Tika Lestari – Digital Marketing Specialist, Tankworld
Diana produces accurate, helpful and customer-focused content based on Tankworld’s real manufacturing processes and products. Working with Tankworld – a trusted Australian tank manufacturer for more than 50 years – she ensures every article is written with clarity, expertise and practical insight.