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📦 Breast pump on pre-order - Shipping mid-August! ⚠️⚠️⚠️

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Backflow prevention x2

€15,90
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Material: PP + food-grade BPA-free silicone

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Protects the motor and the milk circuit

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Wear part to be replaced regularly

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LUPA compatible kit · Sold in pairs

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Designed for Moms

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Soft silicone

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Preserves milk purity

Description keyboard_arrow_down
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The backflow protector prevents milk from flowing back into the motor during pumping. This part protects your breast pump and ensures that your milk remains clean throughout the circuit. It consists of three components: large casing, silicone diaphragm (membrane), small casing.

Made of food-grade PP and food-grade silicone, BPA-free.

Features keyboard_arrow_down
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Material: Food-grade PP + BPA-free food-grade silicone
Dimensions: 63 x 50mm
Weight: 19.3g
Color: White
Composition: Large casing + silicone diaphragm + small casing

Compatible with the LUPA pumping kit

Recommended replacement frequency keyboard_arrow_down
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Exclusive pumping: every month
Occasional pumping: every 2 months

In all cases: replace as soon as you notice any deformation, cracks, or loss of seal.

Shipping & returns keyboard_arrow_down
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Delivery within 3 to 5 business days
Returns possible within 14 days, see our return policy here

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Why are backflow prevention devices essential?

Prevents milk from flowing back into the motor

Ensures the breast pump operates correctly

Ensures a clean milk circuit

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Ensures hygienic and safe use

Need help?

Our team will get back to you within 24 business hours

Frequently Asked Questions

Why do I need a backflow preventer? keyboard_arrow_down
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Without it, milk could back up into the tubing and reach the motor, contaminating the milk and damaging the appliance. It's a safety feature as much as a performance one. Don't pump without it.

How do I clean the backflow preventer? keyboard_arrow_down
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Disassemble the three parts, wash in hot soapy water or steam sterilize. Check that the silicone diaphragm is intact before reassembly. Air dry.

Your Sweet Nothings

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    Gaëlle

    These two small breast shields saved my breastfeeding journey and, above all, allowed me to switch to hands-free pumping. Being braless and having my hands free while pumping completely changed the game. Not to mention the unparalleled comfort compared to other types of breast shields. With the LUPAs, I've even dozed off during a pumping session without fear of them coming undone.

    01/06/2026

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    Anaïs

    Since returning to work, old models were restrictive on a daily basis, especially when getting dressed with the appropriate bras. With your product, everything is simpler: comfortable, practical, and easy to integrate into my routine. I use it everywhere and very often, which proves how much it makes my life easier. Thank you for this quality!

    01/23/2026

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    Matilda

    Initially, I had a lot of trouble getting them to stay put, but with the right size, it really works.

    The silicone is very comfortable, and I have both hands free while pumping. The milk drainage is fast and efficient; I recommend these flanges to all pumping moms.

    03/12/2026

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    Emma

    As you know, my pump-at-breastfeeding journey was a struggle (we're almost at the end now) and Lupa really helped ease the burden. The simple fact of not having to wear a pumping bra, especially for night pumping sessions, makes a huge difference. And the comfort! Thank you for creating these gems and allowing me to benefit from them on the other side of the world 💜

    04/24/2026

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    Thea

    I can only recommend the LUPA 🐺💜

    Finally, hands-free, more comfort and truly optimized pumping sessions! They clearly helped me to continue after returning to work. Once you get the hang of it, it's a real joy. Big plus: they also adapt to manual and hospital breast pumps.

    29/04/2026

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    Aurélie

    I wouldn't go back for anything. LUPA products are incredibly effective: comfortable, practical, and beautiful too. They have completely changed my daily life and made pumping so much simpler and more enjoyable. You can tell they were carefully designed. Thank you for imagining and creating these true little gems 🐺💜

    05/02/2026

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    Maëlle

    I received my flange inserts 2 days ago and I'm already hooked! I'm expressing almost double the amount in half the time, without any massaging or compressions like before. Finally, comfortable pumping, hands-free, even at work behind my computer 😊 Honestly, I should have bought them sooner... Thank you for this incredible invention 😍

    05/03/2026

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    Maureen

    One word: magical ✨

    I regret not having known about LUPA sooner! I hesitated for a long time before ordering, thinking it was mostly marketing... and yet, from the very first try, I pumped an additional 100 ml. A real gain in comfort and efficiency every day. I wholeheartedly recommend it 🐺💜

    05/04/2026

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    Léa

    These nipple shields are a real revolution 🐺💜

    Super comfortable, easy to use, and above all, much more effective than anything I had tried before. My pumping sessions have become much more pleasant, faster, and so much less restrictive in my daily life. Frankly, I couldn't do without them!

    05/05/2026