{"product_id":"silicone-sealing-washer-gaskets-aquarium-irrigation-20-50mm","title":"Silicone Sealing Washers 20–50mm – Aquarium \u0026 Irrigation Gaskets","description":"\n\u003ch2\u003eFood-Grade Silicone Seal Gaskets for Aquarium, Fish Tank \u0026amp; Garden Irrigation\u003c\/h2\u003e\n\u003cp\u003eKeep your water systems leak-free with these durable, food-grade silicone sealing washers. Designed to create a reliable watertight seal on drain pipes, PVC flanges, and garden irrigation connectors, these gaskets are built to last in demanding wet environments. Available in inner diameters of 20, 25, 32, 40, and 50mm, they fit a wide range of standard pipe connectors and fittings.\u003c\/p\u003e\n\n\u003cp\u003eWhether you're setting up a freshwater aquarium, managing a koi pond drain system, or connecting garden irrigation lines, these milky-white silicone gaskets deliver consistent, flexible sealing performance across extreme temperature ranges.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFood-Grade Silicone Material:\u003c\/strong\u003e Safe for aquarium and irrigation use — no harmful chemicals or leaching.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Temperature Range:\u003c\/strong\u003e Rated from -40°C to +200°C (-40°F to 392°F) for year-round reliability.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMultiple Size Options:\u003c\/strong\u003e Available in 20mm, 25mm, 32mm, 40mm, and 50mm inner diameters to match standard pipe fittings.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePressure Rated:\u003c\/strong\u003e Supports up to 850 kPa — suitable for most residential and light-commercial water systems.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlexible Quantity Packs:\u003c\/strong\u003e Order from as few as 5 pieces up to 200 pieces — great for single projects or bulk stocking.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCustom Sizes Available:\u003c\/strong\u003e Need a non-standard size? Contact us with your required outer diameter, inner diameter, and thickness.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDIN Standard Compliance:\u003c\/strong\u003e Manufactured to DIN standards for consistent quality and fitment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFood-Grade Silicone + PE Plastic Flange\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eColor\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMilky White\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInner Diameters\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e20mm, 25mm, 32mm, 40mm, 50mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTemperature Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-40°C to +200°C\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMax Pressure\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u0026lt; 850 kPa\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSafety\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFood-Grade Certified\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStandard\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDIN\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMade in Mainland China\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCommon Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eAquarium and fish tank drain pipe connections\u003c\/li\u003e\n  \u003cli\u003eGarden irrigation pipe sealing\u003c\/li\u003e\n  \u003cli\u003eWater pump inlet\/outlet sealing\u003c\/li\u003e\n  \u003cli\u003ePVC flange connectors in water features and ponds\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eBulk \u0026amp; Custom Orders\u003c\/h3\u003e\n\u003cp\u003eWe welcome wholesale and large-quantity orders. If you require a custom size, simply contact us with the outer diameter (mm), inner diameter (mm), and thickness (mm) you need, and we'll prepare a tailored quote for you.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/airtight-transparent-pet-storage-bottle-craft-beads-home-organization\"\u003eAirtight Transparent PET Storage Bottle | Beads \u0026amp; Crafts\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/ceramic-mini-sealed-storage-jar-portable-travel-container\"\u003eCeramic Mini Sealed Storage Jar – Portable Travel Container\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/vintage-baroque-embossed-metal-decorative-tray-jewelry-organizer\"\u003eVintage Baroque Embossed Metal Tray – Jewelry \u0026amp; Decor Organizer\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/personal-protective-equipment\" target=\"_blank\" rel=\"noopener\"\u003eOSHA on personal protective equipment\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What inner diameter sizes are available for these silicone sealing washers?\u003c\/h4\u003e\n\u003cp\u003eA: These silicone gaskets are available in five standard inner diameters: 20mm, 25mm, 32mm, 40mm, and 50mm. If you require a non-standard size, you can request a custom size by providing the outer diameter, inner diameter, and thickness measurements.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Are these silicone washers safe to use in aquariums with live fish?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. These washers are made from food-grade silicone material, making them safe for use in aquariums, fish tanks, and other water systems where safety and material purity are important.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How many pieces can I order, and is bulk purchasing available?\u003c\/h4\u003e\n\u003cp\u003eA: You can order anywhere from 5 to 200 pieces per order. Wholesale and bulk pricing is available — please contact us directly for large-quantity pricing and shipping options to ensure the most cost-effective solution for your needs.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What is the maximum operating temperature for these gaskets?\u003c\/h4\u003e\n\u003cp\u003eA: These silicone sealing washers are rated for use across a temperature range of -40°C to +200°C (-40°F to 392°F), making them suitable for both cold-water irrigation systems and higher-temperature applications.\u003c\/p\u003e\n\u003c!-- production-packaging-notice --\u003e\n\u003ch3\u003eProduction \u0026amp; Packaging Notice\u003c\/h3\u003e\n\u003cp\u003eTo maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What inner diameter sizes are available for these silicone sealing washers?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"These silicone gaskets are available in five standard inner diameters: 20mm, 25mm, 32mm, 40mm, and 50mm. If you require a non-standard size, you can request a custom size by providing the outer diameter, inner diameter, and thickness measurements.\"}}, {\"@type\": \"Question\", \"name\": \"Are these silicone washers safe to use in aquariums with live fish?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. 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