{"product_id":"breast-pump-replacement-parts-24mm-27mm-flange-duckbill-valve-s18-s21","title":"Breast Pump Replacement Parts – 24mm\/27mm Flange S18\/S21","description":"\n\u003cp\u003eKeep your breastfeeding routine running smoothly with this complete \u003cstrong\u003ereplacement parts kit\u003c\/strong\u003e designed specifically for \u003cstrong\u003eS18 and S21 electric breast pumps\u003c\/strong\u003e. Whether your original parts have worn out or you simply want a reliable backup set, this kit includes everything you need to maintain peak performance and hygiene.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003eThese statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eWhy You'll Love This Kit\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePerfect Compatibility:\u003c\/strong\u003e Engineered exclusively for S18 and S21 electric breast pumps — a seamless drop-in replacement.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTwo Flange Sizes Included:\u003c\/strong\u003e Choose between \u003cstrong\u003e24mm or 27mm\u003c\/strong\u003e single sealed flanges to find the most comfortable and efficient fit for you.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eImproved Milk Collection:\u003c\/strong\u003e Upgraded single-sealed flange design enhances suction and sealing efficiency so you get the most from every session.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSafe, Quality Materials:\u003c\/strong\u003e Made from food-grade \u003cstrong\u003esilicone and PP (polypropylene)\u003c\/strong\u003e — BPA-free, easy to clean, and built to last.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUse Anywhere:\u003c\/strong\u003e Whether you're at home, in the office, or travelling, this compact kit supports your lactation needs on the go.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEverything in One Box:\u003c\/strong\u003e No need to hunt for individual parts — the full set is ready to use right out of the package.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eProduct Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSilicone + PP (Polypropylene)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAvailable Flange Sizes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e24mm \/ 27mm (optional)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBreast Milk Collector\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eApprox. 120 × 110 mm (4.72 × 4.33 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDuckbill Valve\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eApprox. 25 × 20 mm (0.98 × 0.78 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDiaphragm\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eApprox. 40 × 55 mm (1.57 × 2.16 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDust Cover\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eApprox. 115 × 125 mm (4.52 × 4.92 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFlange\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eApprox. 120 × 110 mm (4.72 × 4.33 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Models\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eS18 \/ S21 Electric Breast Pump\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × Breast Milk Collector\u003c\/li\u003e\n  \u003cli\u003e1 × Duckbill Valve\u003c\/li\u003e\n  \u003cli\u003e1 × Diaphragm\u003c\/li\u003e\n  \u003cli\u003e1 × Dust Cover\u003c\/li\u003e\n  \u003cli\u003e1 × Flange (24mm or 27mm — select your size)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eMade in Mainland China.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003ePlease allow ±1–2 cm variance due to manual measurement. Slight colour differences may occur due to monitor display settings.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eHelpful Breastfeeding Resources\u003c\/h2\u003e\n\u003cp\u003eFor guidance on breastfeeding best practices and pump hygiene, visit the \u003ca href=\"https:\/\/www.cdc.gov\/breastfeeding\/recommendations\/handling_breastmilk.htm\" target=\"_blank\" rel=\"noopener\"\u003eCDC's Breastfeeding \u0026amp; Breast Milk Handling Guide\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eYou May Also Like\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003ca href=\"\/products\/1-3l-air-humidifier-professional-large-capacity-humidifier-for-home-double-spray-port-cool-mist-maker-humidifier-with-led-light\"\u003e1.3L Cool Mist Humidifier with LED Night Light \u0026amp; Dual Spray\u003c\/a\u003e — keep nursery air comfortable and hydrated\u003c\/li\u003e\n  \u003cli\u003e\n\u003ca href=\"\/products\/laneige-lip-sleeping-mask-intense-hydration-vitamin-c-berry-070oz\"\u003eLip Sleeping Mask Intense Hydration with Vitamin C – Berry\u003c\/a\u003e — self-care essentials for new mums\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: Which breast pump models are compatible with this replacement parts kit?\u003c\/h4\u003e\n\u003cp\u003eA: This replacement parts kit is designed specifically for the \u003cstrong\u003eS18 and S21 electric breast pumps\u003c\/strong\u003e. It is not guaranteed to fit other pump models, so please confirm your pump model before purchasing.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What flange size should I choose — 24mm or 27mm?\u003c\/h4\u003e\n\u003cp\u003eA: Flange size is determined by the diameter of your nipple (not the areola). Most lactation consultants recommend measuring your nipple and adding 1–3 mm for a comfortable fit. If your nipple diameter is around 21–24 mm, choose the 24mm flange; if it's around 24–27 mm, go with the 27mm option. A proper fit improves milk output and reduces discomfort.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How do I clean and maintain these breast pump parts?\u003c\/h4\u003e\n\u003cp\u003eA: All parts are made from food-grade silicone and PP, making them easy to clean. Rinse with warm water immediately after each use, then wash with mild dish soap or sterilise in boiling water or a steam steriliser. Always allow parts to air-dry completely before reassembly to prevent bacteria growth.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How often should I replace duckbill valves and diaphragms?\u003c\/h4\u003e\n\u003cp\u003eA: Duckbill valves and diaphragms are the parts most prone to wear. Experts generally recommend replacing them every 1–3 months depending on usage frequency, or immediately if you notice reduced suction, cracks, or discolouration. Having a spare kit on hand ensures you're never caught without a functioning pump.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Which breast pump models are compatible with this replacement parts kit?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This replacement parts kit is designed specifically for the S18 and S21 electric breast pumps. It is not guaranteed to fit other pump models, so please confirm your pump model before purchasing.\"}}, {\"@type\": \"Question\", \"name\": \"What flange size should I choose — 24mm or 27mm?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Flange size is determined by the diameter of your nipple (not the areola). Most lactation consultants recommend measuring your nipple and adding 1–3 mm for a comfortable fit. If your nipple diameter is around 21–24 mm, choose the 24mm flange; if it's around 24–27 mm, go with the 27mm option. A proper fit improves milk output and reduces discomfort.\"}}, {\"@type\": \"Question\", \"name\": \"How do I clean and maintain these breast pump parts?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"All parts are made from food-grade silicone and PP, making them easy to clean. Rinse with warm water immediately after each use, then wash with mild dish soap or sterilise in boiling water or a steam steriliser. 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Having a spare kit on hand ensures you're never caught without a functioning pump.\"}}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/vd0uzy-jp.myshopify.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Personal Care \u0026 Devices\", \"item\": \"https:\/\/vd0uzy-jp.myshopify.com\/collections\/personal-care-devices\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"Breast Pump Replacement Parts – 24mm\/27mm Flange S18\/S21\", \"item\": \"https:\/\/vd0uzy-jp.myshopify.com\/products\/breast-pump-replacement-parts-24mm-27mm-flange-duckbill-valve-s18-s21\"}]}\u003c\/script\u003e","brand":"Peaceful Pleasures Health and Wellness","offers":[{"title":"27MM \/ China Mainland","offer_id":53636663705913,"sku":"1005010248324288-27MM-China Mainland","price":14.18,"currency_code":"USD","in_stock":true},{"title":"24MM \/ China Mainland","offer_id":53636663738681,"sku":"1005010248324288-24MM-China Mainland","price":14.18,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0933\/3689\/5801\/files\/Sc5e8e60f9a17405aaed9d369920e94aed.webp?v=1782513365","url":"https:\/\/peacefulpleasureswellness.com\/products\/breast-pump-replacement-parts-24mm-27mm-flange-duckbill-valve-s18-s21","provider":"Peaceful Pleasures Health and Wellness","version":"1.0","type":"link"}