Expandable water storage

More Water.
Ready When
You Need It.

Add as many tanks to your Epp water system as you’d like—there’s no tank-count limit. Each Additional Tank Kit adds 215 gallons of storage, so your reserve can grow with your needs.

Already own a system? We’ll help confirm the right kit and layout.

  • 215 gallons per added tank
  • No tank-count limit
  • Pipe + fittings included
  • 3-year limited warranty
Additional water storage tank with connecting plumbing on a blue background
Additional Tank Kit+215 gallons of storage

Make room for more reserve

Start With Your System.
Add the Storage You Need.

One tank, two tanks, or as many as you’d like—there’s no tank-count limit. These examples show a system starting with 215 gallons, with another 215 gallons added per tank.

Starting system

215 gallons

Standard storage

System + 1 additional tank

430 gallons

215 gallons of added storage

System + 2 additional tanks

645 gallons

430 gallons of added storage

These are examples—not a maximum. Add as many tanks as you’d like. We’ll help plan the space and connections for your setup. Nominal tank capacities shown; actual usable reserve depends on system configuration and operating levels.

More storage—not more well production. Additional tanks hold more available water. They do not increase your source’s production or the system’s pump pressure and flow.

Designed to expand your system

More Capacity.
A Coordinated Setup.

The Additional Tank Kit integrates with Epp water systems to expand their storage. Tell us which system and version you have so we can confirm the appropriate connections before you order.

  • 215 gallons per tank

    Increase your reserve one tank at a time.

  • Pipe and fittings included

    Kit includes connecting pipe and fittings. We’ll confirm your layout and any site-specific requirements.

  • Potable-water storage

    A tank intended for storing potable water—not a water treatment or filtration system.

Get a Quote for Your Setup

Plan your installation

Check the Space.
Plan the Connections.

Allow room for the full system and additional tanks—not just the tank bodies. Use these published layout widths as a starting point, then have us confirm the arrangement for your equipment.

56″System + 1 additional tank
Published overall layout width
87″System + 2 additional tanks
Published overall layout width

System version, plumbing arrangement, and service clearance can affect your installation. These widths are not a complete clearance specification.

Get a Quote & Confirm Your Layout
Epp tank expansion layout diagram showing 56 inches for one added tank and 87 inches for two added tanks
Published expansion layout · confirm your specific configuration

Before you expand

A Few
Helpful Answers.

Not sure how much storage is right? Tell us about your source, existing system, and household demand.

How much storage does each tank add?

Each Additional Tank Kit adds 215 gallons of nominal tank capacity. For a system starting with 215 gallons, one additional tank brings the total to 430 gallons; two bring it to 645 gallons.

Can I expand a system I already own?

The kit is designed to expand Epp water systems. Before ordering, share your model, system version, and a photo of your installation so we can confirm the correct kit and connections.

Does more storage mean more water pressure?

No. Added tanks increase storage capacity. They do not increase well yield, booster-pump output, or pressure. Your source still needs to supply enough water over time to meet your usage.

Is there a limit to how many tanks I can add?

No. You can add as many tanks to your Epp water system as you’d like. Each additional tank adds 215 gallons of storage. Request a quote and we’ll help plan the space, plumbing connections, and layout for the number of tanks you want.

How do I choose the right amount of storage?

The right reserve depends on your source’s production, daily water use, peak demand, and available installation space. We can help review those factors before recommending an expansion.

Build the reserve that fits your home

Ready for
More Water Storage?

Tell us about your current system and available space. We’ll help confirm the tank kit, storage capacity, and layout for your property.

Get a Personalized Quote See Installation Examples

Planning a new system or expanding an existing one? We can help.