How to Choose the Right Willow Replacement Parts for Your Pump

Keeping your Willow pump in top shape means knowing exactly which replacement parts fit your model. Whether you own a Willow 360, Willow Go, or Willow Sync, using the right components keeps suction strong, milk flow consistent, and your pump hygienic. This guide walks you through the key parts you'll need to replace over time and how to pick the correct ones.

We'll cover the most common wear items: duckbill valves, containers, splashguards, and backup bundles. You'll also learn when to swap them out and how to avoid compatibility mix-ups.

Know Your Pump Model First

Willow makes three main wearable pumps: the Willow 360, Willow Go, and Willow Sync. Each uses a slightly different set of parts. For example, the Willow 360 uses a reusable container system, while the Willow Go relies on a container with a splashguard. The Willow Sync uses duckbill valves that are specific to its flange design.

Before you order any replacement, check the model number on your pump or the original box. Using a part meant for a different model can cause leaks, poor suction, or even damage the pump motor. If you're unsure, the product pages on Willow's site clearly list which pump each part works with.

• Willow 360 uses the Willow 360 Container Set (2-pack) and the Willow 360 Backup Container Bundle.
• Willow Go uses the Willow Go Backup Splashguard Container Bundle.
• Willow Sync uses the Willow Sync Duckbill Valve Set (2-Pack).

When to Replace Duckbill Valves and Splashguards

Duckbill valves are the most frequently replaced part on any breast pump. They control the one-way flow of milk and prevent backflow into the tubing or motor. Over time, the silicone softens, splits, or loses its shape, which reduces suction. A good rule of thumb is to replace duckbill valves every 2 to 3 months with regular use, or sooner if you notice a drop in pumping efficiency.

Splashguards on the Willow Go help keep milk from entering the motor area. If you see moisture or milk residue in the pump's airway, it's time to swap the splashguard. The Willow Go Backup Splashguard Container Bundle includes both the splashguard and container, making it a convenient one-stop replacement.

• Replace duckbill valves every 2-3 months or at the first sign of weak suction.
• If you pump multiple times daily, consider keeping a spare set of valves on hand.
• The Willow Sync Duckbill Valve Set (2-Pack) is a direct fit for the Sync pump.

Container and Backup Bundle Options

Having extra containers on hand makes pumping sessions smoother, especially when you're on the go or need to store milk without transferring it immediately. The Willow 360 Container Set (2-pack) gives you two additional containers for the 360 system. For a more complete solution, the Willow 360 Backup Container Bundle includes extra containers plus a few other essentials.

For Willow Go users, the Willow Go Backup Splashguard Container Bundle is the best way to ensure you always have a clean, dry container ready. It includes both the container and splashguard, so you don't have to buy them separately. This bundle is especially useful for working moms who pump multiple times a day and need quick swaps.

• The Willow 360 Container Set (2-pack) is ideal for building a rotation of clean containers.
• The Willow 360 Backup Container Bundle adds a few extras for deeper backup.
• Willow Go users should stick with the Willow Go Backup Splashguard Container Bundle for guaranteed fit.

Maintenance Tips to Extend Part Life

Proper care can make your Willow replacement parts last longer. Always rinse parts immediately after use to prevent milk residue from drying and hardening. Wash with a mild, fragrance-free dish soap and warm water, or use the dishwasher's top rack if the parts are labeled dishwasher-safe. Avoid using abrasive scrub brushes that can scratch silicone surfaces.

Air-dry parts completely on a clean drying rack before storing. Moisture trapped in duckbill valves or splashguards can lead to mold growth. If you travel frequently, the Travel Cleaning Pack is a convenient way to clean parts on the go without needing a full sink setup.

• Hand wash with warm, soapy water and air dry thoroughly.
• Replace any part that shows cracks, discoloration, or sticky residue.
• Store parts in a clean, dry container to avoid contamination.

Choosing the right Willow replacement parts comes down to knowing your pump model and replacing wear items like duckbill valves, containers, and splashguards on schedule. Keeping a backup bundle or extra container set on hand means you'll never be caught without a clean, functioning part. With the right parts and a little maintenance, your Willow pump will keep performing reliably for months to come.