What Contractors Should Know About Underground Water Storage

Underground water storage tanks help contractors provide reliable water storage while keeping the surface area available for other uses. They are used on residential, commercial and industrial projects, but selecting the right tank requires more than choosing a capacity. 

Before installation, contractors must check water demand, site conditions, groundwater levels, soil cover, traffic loads, access points and pipe connections. Tank dimensions and weight also affect excavation, delivery and lifting plans. 

Understanding these factors can reduce delays and avoid costly on-site changes. This guide explains the key considerations contractors should review when selecting and planning underground concrete water storage tanks from Acton Precast Concrete Limited in Ontario.

What Water Storage Tank Capacities Does APC Offer?

Acton Precast Concrete Limited offers several precast concrete water storage tanks, from 2,000-gallon cisterns to an 11,000-gallon heavy-duty tank.

APC product	Capacity	Outside dimensions	Approx. weight	Listed price
2,000-gallon cistern	2,000 gal / 9,100 L	138 × 79 × 65 in	7 tons	$3,300
2,000-gallon HD cistern	2,000 gal / 9,100 L	156 × 108 × 56 in	15 tons	$8,500
3,500-gallon water storage tank	3,500 gal	Confirm drawing	14 tons	$7,600
4,000-gallon HD water storage tank	4,000 gal	156 × 108 × 104 in	24 tons	$12,500
6,000-gallon water storage tank	6,000 gal	178 × 116 × 124 in	20 tons	$10,700
11,000-gallon HD water storage tank	11,000 gal / 50,000 L	240 × 120 × 136 in	50 tons total	$22,600

Prices and specifications are based on the product information supplied by APC. Confirm current pricing, availability, dimensions, weight and included components before ordering. The 11,000-gallon tank has two sections, each listed at 25 tons. The customer is responsible for shipping and setting this tank.

APC's standard 2,000-gallon cistern includes Polylok lids, a filter and a safety screen. The 3,500-gallon tank is listed with a Polylok riser and safety screen. The 6,000-gallon tank also includes Polylok risers and a safety screen.

The 2,000-gallon HD and 4,000-gallon HD models are listed as reinforced for traffic loading. APC also lists the 11,000-gallon tank as reinforced for CHBD loads.

Review the concrete water storage tank product range to check the latest details and technical drawings.

What Should Contractors Check Before Selecting an Underground Tank?

Tank capacity is only one part of the selection process. Contractors must also assess the installation site, planned surface loads, access conditions and required connections.

How Much Space Does the Tank Need?

Use the tank's external dimensions to plan the excavation and installation area. Allow space for the tank, the required base, safe access and lifting equipment.

A tank with a suitable storage capacity may still be unsuitable if its dimensions do not fit the site. Check the product drawing before finalising the excavation plan.

For example, APC's standard 2,000-gallon cistern measures 138 inches long, 79 inches wide and 65 inches high. Its 2,000-gallon HD cistern is larger, measuring 156 inches long, 108 inches wide and 56 inches high.

These differences show why contractors should compare individual models rather than assume tanks with the same capacity have the same dimensions.

How Do Soil and Groundwater Conditions Affect Installation?

Soil and groundwater conditions can affect excavation, tank stability and installation requirements. High groundwater levels may create buoyancy forces that require specific engineering measures.

Contractors should arrange for the site conditions to be assessed by the appropriate project professional. The installation design must account for the actual soil and groundwater conditions.

Do not assume that every tank can be installed using the same excavation or bedding method. Follow the approved design and the manufacturer's installation instructions.

What Nearby Structures and Services Should Contractors Consider?

Before excavation, identify underground utilities, nearby foundations, drainage lines and other structures. Excavation must not damage buried services or undermine adjacent foundations.

Confirm utility locations, required clearances and access for construction equipment before work begins. Early planning can reduce the risk of delays and expensive changes during installation.

What Should Contractors Know About Traffic Loading?

Some underground water storage tanks are installed beneath driveways, parking areas or other locations where vehicles travel. These installations require careful attention to structural loading.

APC lists two heavy-duty models reinforced for traffic loading: the 2,000-gallon HD cistern and the 4,000-gallon HD water storage tank. The 11,000-gallon tank is listed as reinforced for CHBD loads.

These descriptions do not mean that every model is suitable for every vehicle or site condition. Contractors must confirm the applicable loading limits, cover depth and installation requirements for the selected tank.

Check the product drawing and project specifications before placing a tank beneath a driveway or parking area. Do not rely on soil cover alone to determine whether the installation is suitable.

Why Are Tank Dimensions and Weight Important?

Tank dimensions affect excavation, delivery access and placement. Tank weight determines the lifting equipment and handling arrangements required for installation.

APC's listed tank weights range from 7 tons for the standard 2,000-gallon cistern to 50 tons for the complete 11,000-gallon heavy-duty tank. The 11,000-gallon model consists of two sections, each listed at 25 tons.

This information has a direct effect on project planning. Contractors must confirm that the delivery route, ground conditions and lifting equipment can accommodate the selected tank.

Review the product drawing for the exact dimensions, weight, lifting details and connection locations. Do not estimate lifting requirements from tank capacity alone. Use the manufacturer's approved handling instructions and qualified lifting personnel.

What Should Contractors Check Before Tank Delivery?

Preparation before delivery can help prevent delays on site.

Confirm the tank model, dimensions, weight and included components. Check that the access route can accommodate the delivery vehicle and that the site can support the vehicle and lifting equipment.

Prepare the excavation and base according to the approved installation design. Arrange the required lifting equipment and qualified operators before the delivery date.

Contractors should also confirm who is responsible for unloading and setting the tank. This is particularly important for the 11,000-gallon HD tank, for which APC states that the customer is responsible for shipping and setting. Each section weighs 25 tons, so transport and placement require careful coordination.

Inspect the tank and its components for visible damage when they arrive. Keep the technical drawing and installation instructions available during installation.

Which Connections and Access Components Should You Plan For?

Underground water storage tanks may require lids, risers, filters, safety screens and pipe connections. The components required depend on the tank model and the intended use.

APC's standard 2,000-gallon cistern includes Polylok lids, a filter and a safety screen. The 3,500-gallon model is listed with a Polylok riser and safety screen. The 6,000-gallon model includes Polylok risers and a safety screen.

Other models may have different configurations. Contractors should check the individual product listing and technical drawing to confirm what is included.

Before ordering, confirm the required inlet, outlet and overflow arrangements with the project designer. Check the access opening and ensure that the selected components are compatible with the tank.

Do not assume that every tank includes the same fittings or accessories. Confirm the required components before scheduling delivery.

What Standards and Approvals Should Contractors Review?

Requirements depend on the intended use of the stored water, the project design and the applicable approval process.

For potable water applications, contractors must confirm that the tank and associated materials are suitable for drinking-water storage. Non-potable water storage and other applications may have different requirements.

Before construction, review the applicable Ontario Building Code provisions, local approvals, project specifications and relevant standards with the project designer or authority having jurisdiction.

Do not assume that a tank is approved for drinking water or a particular installation based only on its material or capacity. Confirm the manufacturer's documentation and the requirements for the intended application.

How Can Contractors Reduce Installation Delays?

Contractors can reduce avoidable delays by confirming project requirements before ordering.

Start by identifying the intended use and required storage capacity. Assess the site, including access, soil, groundwater, nearby structures and planned surface loads. Compare the dimensions and weight of the available tanks against the site conditions.

Review the technical drawing to confirm connections, access components and loading requirements. Coordinate transport, unloading and lifting arrangements before the scheduled delivery date.

Finally, prepare the installation according to the approved design and manufacturer's instructions. Resolve questions about tank dimensions, loading, connections and site preparation before delivery. Changes made after excavation or delivery can increase costs and delay the project.

Where Can Contractors Find Concrete Water Storage Tanks in Ontario?

Acton Precast Concrete Limited supplies precast concrete water storage tanks in several capacities. The range includes standard cisterns, heavy-duty tanks reinforced for specified loading conditions, and models supplied with different access components.

Contractors can compare tank dimensions, weight, capacity and included accessories before selecting a model. Each product listing also provides a technical drawing to support project planning.

Visit APC's concrete water storage tank category to review the available products and drawings.

For product questions, contact Acton Precast Concrete Limited at 8949 Wellington Road 50, Acton, Ontario L7J 2L8, Canada. Call 519-853-1529 or toll-free at 1-800-461-1516, or visit https://actonprecast.com/.

Frequently Asked Questions

What size underground water storage tank does a contractor need?

The required capacity depends on the project's water demand, intended use and available space. APC lists concrete water storage tanks from 2,000 gallons to 11,000 gallons. Contractors should calculate the required storage volume before selecting a model.

Can a concrete water storage tank be installed beneath a driveway?

APC lists specific heavy-duty tanks as reinforced for traffic loading. Contractors must confirm the selected model's loading limits, cover requirements and installation details before placing it beneath a driveway or parking area.

Why should contractors check groundwater conditions?

Groundwater can affect excavation and tank stability. High groundwater levels may create buoyancy forces. The site conditions and installation design must account for these risks.

Why are tank technical drawings important?

Technical drawings provide product-specific dimensions and other installation details. Contractors use them to plan excavation, delivery, lifting, connections and access components.

Do APC water storage tanks include lids and risers?

Included components vary by model. APC lists some tanks with Polylok lids, filters, risers and safety screens. Check the individual product listing and drawing to confirm the supplied components.

Who arranges shipping and setting for APC's 11,000-gallon tank?

APC's product information states that the customer is responsible for shipping and setting the 11,000-gallon HD water storage tank. It is supplied in two sections, each weighing 25 tons. Confirm the transport and lifting arrangements with APC before ordering.

Where can contractors buy underground concrete water storage tanks in Ontario?

Contractors can review APC's available products through the concrete water storage tank category. Review the technical drawing and confirm product suitability before ordering.

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