Evolve & FIT Pro Accessories & Parts

Evolve & FIT Pro Accessories — Genuine Parts That Keep Your Pump Performing

Breast pump parts wear out. That's not a flaw — it's how the system is designed to work. Silicone duckbill valves lose their elasticity after weeks of daily compression. Backflow protector diaphragms degrade with repeated sterilization. Tubing gets micro-cracks that affect suction pressure. And flanges that fit perfectly at two weeks postpartum may feel different as your body changes.

The difference between a pump that performs at the same level for two years and one that seems to lose suction after a few months almost always comes down to parts maintenance. Fresh valves, clean tubing, and properly fitting flanges are what keep a hospital-grade pump performing at hospital-grade standards.

This collection covers every genuine replacement part and accessory for the FIT Pro and the Evolve pump systems — 29 products across six categories: wear parts, structural components, flange funnels in 13 sizes (10mm through 32mm), nipple shields, storage, and power supply. All parts are genuine replacements, made to the same BPA-free, phthalate-free standards as the pumps themselves, and compatible with the full Evolve and FIT Pro range.

Complete Parts & Accessories Reference

All 29 products are organized by category. Prices and compatibility confirmed from the live product pages.

Wear Parts — Replace Regularly

These parts directly create or protect suction. They degrade with normal use and are the most common cause of reduced pump performance.

Structural Parts — Replace When Damaged

These parts form the pump assembly. They last longer than wear parts but should be replaced if cracked, warped, or no longer sealing properly.

Flange Funnels — 13 Sizes from 10mm to 32mm

Flange funnels insert into the flange base and determine the size of the opening that fits around your nipple. Hygeia carries the most complete size range available in a single accessory store — from the smallest 10mm up to the XL 32mm — which means moms with very small or very large nipple diameters can get an accurate fit without adapters or workarounds.

Use the Flange Sizing Guide to measure correctly before ordering. Getting this right matters more than any other part choice.

Nipple Shields

Nipple shields are thin silicone covers that fit over the nipple during pumping or nursing. They're primarily used when direct latch is difficult due to flat or inverted nipples, nipple soreness, or a significant size difference between nipple and flange. Available in 15mm and 21mm.

Storage, Power & Tools

When to Replace Your FIT Pro and Evolve Parts

Suction loss is the clearest sign something needs replacing — but catching wear earlier keeps your pump working consistently rather than reacting to performance drops mid-session. Here's the replacement timeline for each part category.

Duckbill Valves — Every 4 to 8 Weeks

Duckbill valves are the single most common reason a pump starts underperforming. The silicone petals that create the one-way seal lose elasticity from repeated compression and sterilization, and milk residue accelerates degradation even with thorough cleaning. Most moms who pump daily should plan on replacing valves once a month as standard practice — not when suction visibly drops, but as a scheduled maintenance step.

If your pump suddenly feels weaker and nothing else changed, check the valves first. Pull the petals apart gently — if they don't spring back immediately, they've lost their seal. Replace valves here.

Backflow Protectors — Every 1 to 3 Months

The 3-piece backflow protector (housing, silicone diaphragm, and cap) prevents milk from traveling back toward the pump motor. The silicone diaphragm is the critical component — it creates the membrane seal. Inspect it monthly for cloudiness, tackiness, tears, or any visible deformation. If it doesn't sit flat in the housing or shows any surface breakdown, replace the set. Keeping milk out of the tubing and motor depends on this part functioning correctly.

Also replace the full set if you've had any instance of visible moisture inside the tubing — that indicates the diaphragm has already failed. Backflow Protector (2ct) — $14.99 .

Tubing — Every 3 to 6 Months

Tubing carries the pressure from the motor to the flange assembly. Micro-cracks, cloudiness, and any yellow discolouration reduce pressure efficiency and create hygiene risks. Check tubing monthly — hold it up to a light source and look for cracks, particularly at the connector ends where stress concentrates. If you notice condensation inside the tubing during sessions, that's a sign of backflow protector failure rather than the tubing itself, but inspect both when it happens.

Never try to rinse or wash tubing — moisture inside tubing causes mould. If condensation appears, replace it immediately. Replacement Tubing (2ct) — $19.99..

Flange Funnels — When Fit Changes or Damage Appears

Flanges don't have a fixed replacement cycle — they're replaced when your fit changes or when the funnel shows visible damage. Your nipple size can shift during early postpartum weeks, at different phases of the pumping day, and as your supply establishes. If you start noticing nipple redness, a white ring around the base of your nipple after pumping, or reduced output despite strong motor function, re-measure and order the correct size from the full range.

Flange funnels that are cracked, have visible stress marks at the neck, or no longer seat firmly in the flange base should be replaced regardless of fit. Hygeia carries 13 sizes from 10mm to 32mm — the widest range available in a single store.

Locking Rings and Discs — When They No Longer Seal Tightly

Locking rings and discs secure the flange assembly and bottle connection. They don't wear on a schedule but should be checked every few months for hairline cracks or stripped threads. If any part of the assembly feels loose during a session, inspect these components first. Locking Rings (2ct) — $6.50 | Locking Discs (2ct) — $6.50.

Flange Sizing for the FIT Pro and Evolve — Why It Matters and How to Get It Right

Flange size is the most overlooked factor in pumping output, and it's probably the most important one. A flange that's too small compresses the nipple canal and restricts milk flow. One that's too large pulls in too much areola tissue, creating friction and reducing suction efficiency. In both cases the result is the same: less milk per session, more discomfort, and a pump that appears to be underperforming when the real issue is fit.

The standard guidance is to measure your nipple diameter in millimeters — just the nipple, not the surrounding areola — and add 2 to 4mm. So a 20mm nipple diameter typically needs a 22mm to 24mm funnel. That said, fit also depends on nipple shape, tissue flexibility, and whether the nipple has any swelling during early postpartum weeks, so some adjustment is usually needed.

What Size Comes With the FIT Pro

The FIT Pro PAS kit includes 24mm and 28mm flange funnels. These two sizes cover a broad starting range, but 24mm and 28mm are not the only sizes that fit the FIT Pro flange base. All funnel sizes in this collection — from 10mm through 32mm — are compatible with the standard Evolve and FIT Pro flange base assembly.

Available Sizes in This Collection

• Extra small: 10mm, 11mm, 12mm, 13mm
• Small: 15mm, 17mm, 19mm, 21mm
• Medium: 24mm, 27mm, 28mm
• Large: 30mm
• Extra large: 32mm

Single funnels are $6.99. The 28mm size also comes as a 2-pack for $12.99 — useful if you're confident in your size and pump both sides simultaneously. If you're unsure which size to start with, the Flange Sizing Guidewalks through the measurement process, or you can book a 1:1 session with an IBCLC through the Hygeia Baby App for a personalised fit assessment.

Signs Your Current Flange Size Is Wrong

• Nipple redness, blanching, or white ring at the base after pumping — likely too small
• Areola being pulled significantly into the tunnel during expression — likely too large
• Nipple rubbing the sides of the funnel during suction — too small
• Reduced output despite strong motor suction — often fit-related
• Discomfort or pain during expression — re-measure before assuming a pump fault