Unleash the Power of Subterranean Storage: How to Build an Underground Water Storage Tank

Water scarcity is a growing concern worldwide, making it crucial to find innovative solutions for water storage. An underground water storage tank is an effective way to collect and store rainwater or excess water from other sources for later use. This guide will provide a step-by-step process on how to build an underground water storage tank, ensuring a reliable source of water for your home or business.

Materials and Tools

Before embarking on this project, gather the necessary materials and tools:

• Plastic or concrete tank (size depends on storage capacity)
• Gravel or sand for bedding
• Pipe and fittings for inlet and outlet
• Submersible pump
• Float switch
• Backfill material (soil or crushed stone)
• Measuring tape
• Shovel
• Pickaxe
• Level
• Safety gear (gloves, goggles, hard hat)

Choosing a Location

The ideal location for your underground water storage tank is:

• Away from trees and other vegetation with extensive root systems
• Not in an area prone to flooding or excessive moisture
• Accessible for maintenance and pump installation

Excavation

1. Mark the Excavation Area: Determine the dimensions of your tank and mark the excavation area accordingly.
2. Excavate the Pit: Dig a pit slightly larger than the tank’s dimensions, allowing for bedding material. Ensure the sides are level and the base is flat.
3. Create a Gravel Bed: Spread a layer of gravel or sand at the bottom of the pit for drainage and support.

Tank Installation

1. Position the Tank: Carefully lower the tank into the pit, ensuring it sits level on the gravel bed.
2. Backfill Around the Tank: Fill the space around the tank with backfill material, compacting it firmly to prevent settling.

Inlet and Outlet Installation

1. Install the Inlet Pipe: Connect the inlet pipe to the tank and extend it above ground for rainwater collection or connection to an external water source.
2. Install the Outlet Pipe: Connect the outlet pipe to the tank and extend it above ground for pump access.

Submersible Pump Installation

1. Install the Submersible Pump: Lower the submersible pump into the tank and secure it to the outlet pipe.
2. Attach the Float Switch: Install a float switch at the desired water level to automatically control the pump.

Finishing Touches

1. Cover the Excavation: Place a lid or cover over the excavation area to protect the tank and pump from debris and weather.
2. Landscaping: Restore the surrounding area to its original condition or enhance it with landscaping elements.

Maintenance

Regular maintenance is essential to ensure the longevity of your underground water storage tank:

• Inspect the Tank: Periodically inspect the tank for any leaks or damage.
• Clean the Filter: Regularly clean the filter on the inlet pipe to prevent clogging.
• Check the Pump: Inspect and service the submersible pump according to the manufacturer’s instructions.

Takeaways: Harvesting Water for the Future

By following these steps, you can successfully build an underground water storage tank that will provide a reliable source of water for your household or commercial needs. This sustainable solution not only conserves water but also enhances your water security and independence.

What You Need to Know

Q1: What is the lifespan of an underground water storage tank?
A: Concrete tanks can last up to 50 years, while plastic tanks typically have a lifespan of 20-30 years.

Q2: How can I prevent algae growth in my tank?
A: Install a UV water purification system or add algaecide to the tank as directed by the manufacturer.

Q3: How do I calculate the storage capacity of my tank?
A: Multiply the tank’s length, width, and height in feet to determine the volume in cubic feet. Then, multiply by 7.48 to convert to gallons.