{"product_id":"tianyan-aquarium-pvc-bulkhead-fitting-fish-tank-inlet-outlet-drain-union-overflow-water-connector-20mm-50mm-atradesen","title":"Tianyan Aquarium PVC Bulkhead Fitting | Fish Tank Inlet, Outlet, Drain \u0026 Union Overflow Water Connector (20mm-50mm) - Atradesen","description":"\u003ch2\u003eTianyan Premium Aquarium Bulkhead Fittings \u0026amp; Over Connectors (20mm - 50mm)\u003c\/h2\u003e\n\u003cp\u003e\n  Configure your fish tank plumbing with our premium Tianyan aquarium bulkhead fittings, available at \u003ca href=\"https:\/\/atradesen.com\" target=\"_blank\"\u003eAtradesen.com\u003c\/a\u003e. Manufactured from drinking-water-grade (potable) PVC, these connectors are completely non-toxic and lead-free, ensuring they are safe for sensitive freshwater fish, reef aquariums, and marine life. \n\u003c\/p\u003e\n\u003cp\u003e\n  Whether you are setting up a bottom-drain overflow system, a multi-stage sump filter, or bottom blowout water currents, this versatile series provides high-seal and low-resistance flow paths. Choose between sleek Dark Gray and clean White to match your aquarium's aesthetic.\n\u003c\/p\u003e\n\n\u003ch3\u003eFitting Models \u0026amp; Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInlet\/Outlet Bulkheads (Straight \u0026amp; Elbow):\u003c\/strong\u003e Standard bulkheads for smooth water delivery and return lines through the bottom or back glass.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-Flow Fast Drains (Straight \u0026amp; Elbow):\u003c\/strong\u003e Feature protective grid strainer caps to allow high-volume bottom drainage while preventing fish or snails from entering the plumbing.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUnion Bulkheads (Single \u0026amp; Double Union):\u003c\/strong\u003e Incorporate union coupling nuts allowing easy tool-free detachment of the plumbing for routine maintenance and cleaning.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShort Single Union:\u003c\/strong\u003e Compact single-union profile ideal for tight cabinet spaces under the sump.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBottom Inlet Straight:\u003c\/strong\u003e Specifically optimized for creating upward, bottom-up flow dynamics in specialized aquariums.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e⚠️ Size Selection \u0026amp; Installation Guide\u003c\/h3\u003e\n\u003cp\u003e\n  \u003cstrong\u003ePlease read these critical alignment steps before ordering to ensure a leakage-free fit:\u003c\/strong\u003e\n\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSocket Diameter Matches Pipe OD:\u003c\/strong\u003e The product size options (e.g., 20mm, 25mm) refer to the \u003cstrong\u003eINNER diameter (ID) of the connector socket\u003c\/strong\u003e. Choose the option that matches the \u003cstrong\u003eOUTER diameter (OD) of your PVC pipe\u003c\/strong\u003e.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGlass Hole Drilling \u0026amp; Clamping Thickness:\u003c\/strong\u003e Standard PVC pipes cannot pass directly through the glass. You must drill the correct hole size according to the thread specification of each connector model. Please refer carefully to our specification chart images for exact \u003cstrong\u003eglass drilling diameters\u003c\/strong\u003e and \u003cstrong\u003emaximum glass clamping thicknesses\u003c\/strong\u003e.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual Connection Methods:\u003c\/strong\u003e Features socket ends designed for standard PVC solvent glue welding, alongside compression unions for rapid maintenance access.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eProduct Specifications\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin-top: 15px;\"\u003e\n  \u003cthead\u003e\n    \u003ctr style=\"background-color: #f2f2f2; text-align: left;\"\u003e\n      \u003cth style=\"padding: 8px; border: 1px solid #ddd;\"\u003eFeature\u003c\/th\u003e\n      \u003cth style=\"padding: 8px; border: 1px solid #ddd;\"\u003eDetails\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding: 8px; border: 1px solid #ddd; font-weight: bold;\"\u003eBrand \u0026amp; Quality\u003c\/td\u003e\n      \u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eTianyan Premium Aquarium Series\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding: 8px; border: 1px solid #ddd; font-weight: bold;\"\u003eMaterial\u003c\/td\u003e\n      \u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eAquarium-Grade, Potable PVC (Lead-Free \u0026amp; Safe for Reefs)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding: 8px; border: 1px solid #ddd; font-weight: bold;\"\u003eColor Options\u003c\/td\u003e\n      \u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eDark Gray \/ White\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding: 8px; border: 1px solid #ddd; font-weight: bold;\"\u003eFitting ID \/ Pipe OD\u003c\/td\u003e\n      \u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e20mm, 25mm, 32mm, 40mm, 50mm\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding: 8px; border: 1px solid #ddd; font-weight: bold;\"\u003eSealing Design\u003c\/td\u003e\n      \u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eDouble embedded EPDM\/Silicone O-rings for tight glass seals\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003c!-- 底部跨链互引提示 (Cross-Linking) --\u003e\n\u003cdiv style=\"background-color: #f9f9f9; border: 1px solid #e1e1e1; padding: 12px; border-radius: 6px; margin-top: 25px;\"\u003e\n  \u003cp style=\"margin: 0; font-size: 14px; color: #555;\"\u003e\n    \u003cstrong\u003eLooking for complete water control?\u003c\/strong\u003e \n    Explore compatible valves, hoses, and quick-release couplers in our \n    \u003ca href=\"https:\/\/atradesen.com\/collections\/hoses-pneumatics-quick-connects\" style=\"text-decoration: underline; font-weight: bold; color: #0056b3;\"\u003eHoses, Pneumatics \u0026amp; Quick Connects collection\u003c\/a\u003e.\n  \u003c\/p\u003e\n\u003c\/div\u003e","brand":"Atradesen","offers":[{"title":"Inlet\/Outlet Straight Bulkhead \/ Dark Gray \/ 20mm","offer_id":56372636156070,"sku":"GHC0132","price":4.35,"currency_code":"USD","in_stock":true},{"title":"Inlet\/Outlet Straight Bulkhead \/ Dark Gray \/ 25mm","offer_id":56749964394662,"sku":null,"price":5.62,"currency_code":"USD","in_stock":true},{"title":"Inlet\/Outlet Straight Bulkhead \/ Dark Gray \/ 32mm","offer_id":56749964427430,"sku":null,"price":6.85,"currency_code":"USD","in_stock":true},{"title":"Inlet\/Outlet Straight Bulkhead \/ Dark Gray \/ 40mm","offer_id":56749964460198,"sku":null,"price":7.84,"currency_code":"USD","in_stock":true},{"title":"Inlet\/Outlet Straight Bulkhead \/ Dark Gray \/ 50mm","offer_id":56749964492966,"sku":null,"price":8.03,"currency_code":"USD","in_stock":true},{"title":"Inlet\/Outlet Straight Bulkhead \/ White \/ 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