RO Water Filter 113 & 115 Tank Replacement: Step-by-Step

By DREO Home Ecosystem | Air Comfort, Smart Kitchen | Published: 2026-10-22

Category: How-to Guides

Learn how to replace the water tank on your DREO RO Water Filter 113 or 115. This guide covers preparation, installation, and common mistakes to avoid.

Quick Answer

To replace the water tank on your DREO RO Water Filter 113 or 115, power off the system, remove the old tank, install the new 1.3-gallon tank, and run a rinse cycle before drinking.

Why Replace the Tank?

Over time, the water tank in your RO filter can develop mineral buildup, cracks, or simply wear out. Replacing it restores performance and ensures your filtered water stays fresh.

The DREO replacement tank for models 113 and 115 holds 1.3 gallons (5 liters), which is larger than some original tanks, meaning fewer refills during the day.

What You'll Need

Before you start, gather the replacement tank, a clean cloth, and a container to catch any residual water. No special tools are required.

Ensure the replacement tank is compatible with your model. The DREO RO Water Filter 113 and 115 use the same tank design, so this guide applies to both.

Step-by-Step Replacement Process

Power Off and Prepare: Turn off the water filter and unplug it. Empty any remaining water from the current tank into a sink or container. Check that the system is cool to the touch. Always unplug before handling to avoid electrical or water damage.
Remove the Old Tank: Lift the old tank out of its compartment. If it is connected with a tube, gently detach it, being careful not to spill residual water. Dispose of the old tank responsibly. Inspect the old tank for cracks or buildup—this can indicate if the replacement was necessary.
Install the New Tank: Place the new tank into the compartment, ensuring it sits securely. If there is a tube, connect it firmly. Make sure the tank is properly aligned to avoid leaks. Check that the tank is level and the connection is snug before moving on.
Run a Rinse Cycle: Fill the tank with fresh water, power the system back on, and run a rinse cycle as per your manual. Discard the first batch of water to flush out any residues from the new tank. Never drink the first batch after installation—always flush to ensure freshness.
Check for Leaks: After the rinse cycle, inspect around the tank and connections for any leaks. Wipe the area dry and monitor for a few minutes. If you notice a leak, re-seat the tank and tighten connections. If it persists, contact support.

Replacement Tank

RO Water Filter 113 & 115 Water Tank Replacement: Designed for DREO Water Filter 113 and 115, this 1.3 gal (5 L) water tank offers a larger capacity for fewer refills throughout the day. A larger tank means you won't have to refill as often, making it a practical upgrade for busy households.
RO Water Filter 113 & 115 Water Tank Replacement