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Duckbill valves are the highest-frequency replacement item — plan on replacing them every 4 to 8 weeks if you're pumping daily. Backflow protector diaphragms follow at every 1 to 3 months. Tubing typically lasts 3 to 6 months. Structural parts like locking rings, discs, and flange bases last much longer and are replaced on condition rather than a schedule. The Nipple Measuring Tool and storage containers don't have a replacement cycle.

The clearest sign is a noticeable drop in suction with no other change. You can also test directly: remove the valves, hold them up to a light, and gently pull the petals apart. Healthy valves spring back immediately and completely. Worn valves either stay partially open or close sluggishly. If there's any visible tearing, white spots, or stickiness, replace immediately. Duckbill Valves (2ct) — $12.99.

Moisture inside tubing almost always indicates backflow protector failure — milk or water vapor has moved past the diaphragm and into the tube. Stop using the pump immediately, inspect the backflow protector for damage, and replace both the backflow protector and the tubing before continuing. Never attempt to dry or reuse tubing that has had moisture inside it — mould grows rapidly in pump tubing.

The process is the same as with any pump measure your nipple diameter in millimeters (nipple only, not the areola) and add 2 to 4mm. The One-Hand pump includes 24mm and 28mm funnels. The Two-Hand pump includes 27mm and 29mm flanges. If you're between sizes or unsure, visit the Flange Sizing Guide for a full walkthrough, or connect with an IBCLC through the Hygeia Baby App for a personal fit assessment.

Yes — the duckbill valves, backflow protectors, tubing, flange bases, locking rings, locking discs, storage containers, and all flange funnels in this collection are compatible with both the Hygeia FIT Pro and Hygeia Evolve pump systems. Many parts are also cross-compatible with the Hygeia Express — the product name on each listing confirms which pumps it fits.

The flange base is the rigid housing that connects to the pump tubing and holds the assembly together. The flange funnel sits inside the base and is the part that actually contacts your breast — it's the tunnel that your nipple draws into during expression. The funnel is size-specific to your nipple measurement; the base is the same across all funnel sizes. If you're switching to a different funnel size, you don't need a new base unless yours is damaged.

Nipple shields are not required for standard pumping — they're a specialised tool for specific situations. Use cases include: flat or inverted nipples that make latching difficult, significant nipple soreness in the early postpartum period, or large nipple-to-flange size gaps that create contact issues. They're available in 15mm and 21mm. If you're unsure whether a nipple shield is right for your situation, an IBCLC session through the Hygeia Baby App can help you make that decision with professional guidance.

Measure your nipple diameter in millimeters at the base of the nipple — not including the areola. Add 2 to 4mm to that measurement to get your starting funnel size. Hygeia carries sizes from 10mm to 32mm, so you can get a precise fit regardless of nipple size. For a full step-by-step guide, visit the Flange Sizing Guide. If you want a personalized assessment, book a 1:1 session with a certified IBCLC through the Hygeia Baby App via the Lactation Assistance page.

Several parts in this collection — including duckbill valves, backflow protectors, tubing, locking rings, locking discs, and flange funnels — are cross-compatible with the Hygeia Express. Each product listing confirms compatible models in the title (e.g., 'Express/FIT Pro/Evolve'). For Express-specific wearable parts like flange inserts and cup assemblies, see the dedicated Express Accessories & Parts collection.

Rinse all parts that contact milk immediately after each session under cold water to prevent residue from drying. Then wash with warm soapy water, rinse thoroughly, and air dry on a clean cloth or drying rack — never towel dry as this transfers lint and bacteria. For sterilization, most Hygeia parts are suitable for steam sterilization bags or a dishwasher top rack. Never submerge or rinse the tubing — if moisture gets inside, replace it immediately. Replace parts on schedule regardless of visual condition, as silicone degrades before it visibly shows wear.

Start with the Troubleshooting guide which covers the most common performance issues and their part-level causes. For pump-specific assembly and parts identification, the Instruction Manuals and Instruction Videos walk through each component visually. For questions about fit, supply, or how parts affect pumping technique, the Hygeia Baby App connects you with IBCLC lactation consultants who can advise on part selection alongside pumping support — visit the Lactation Assistance page to get started.