{"product_id":"pvc-90-elbow-pipe-fittings-20-50mm-tank-connector-bulkhead-aquarium-black","title":"PVC 90° Elbow Pipe Fittings 20mm~50mm Tank Connector Bulkhead For Aquarium Black","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003ch2\u003ePVC 90° Elbow Pipe Fittings — Reliable Tank Connector Bulkhead for Aquarium Plumbing\u003c\/h2\u003e\n    \u003cp\u003eAquarium builders, pond installers, and hydroponic system designers often struggle to find pipe fittings that seal reliably under continuous water exposure without corroding or warping over time. These black PVC 90° elbow pipe fittings and straight connectors are sized from 20mm to 50mm, making them a practical solution for hobbyists and professionals who need a dependable tank connector bulkhead that holds up in wet environments.\u003c\/p\u003e\n    \u003cp\u003eEach fitting is molded from rigid PVC (polyvinyl chloride), a material known for its resistance to moisture, mild chemicals, and biological growth. The range covers five nominal pipe diameters — 20mm (~¾ in), 25mm (~1 in), 32mm (~1¼ in), 40mm (~1½ in), and 50mm (~2 in) — available in both 90° elbow and straight configurations. Fittings are offered in packs of 1, 2, or 5 pieces to match project scale.\u003c\/p\u003e\n    \u003cp\u003eTypical applications include aquarium sump return lines and overflow plumbing, koi pond filtration pipework, hydroponic nutrient delivery circuits, and rainwater harvesting tank connections. The black finish reduces light transmission into the pipe, helping to inhibit algae growth inside the line — a practical advantage for aquarium and pond setups.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-compat\"\u003e\n    \u003cspan class=\"hdiy-compat-icon\"\u003e🔗\u003c\/span\u003e\n    Compatible with standard metric PVC pipe in 20mm, 25mm, 32mm, 40mm, and 50mm nominal diameters. Verify your pipe OD before ordering. Not designed for high-pressure or high-temperature applications.\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-features\"\u003e\n    \u003ch2\u003e✅ Key Features of These PVC 90° Elbow Pipe Fittings\u003c\/h2\u003e\n    \u003cul class=\"hdiy-list\"\u003e\n      \u003cli\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e💧\u003c\/span\u003e\n        \u003cstrong\u003eMoisture-Resistant PVC Construction\u003c\/strong\u003e — Rigid PVC resists continuous water exposure, mild aquarium chemicals, and biological fouling without softening or degrading under normal operating conditions.\n      \u003c\/li\u003e\n      \u003cli\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\n        \u003cstrong\u003eFive Sizes in One Listing\u003c\/strong\u003e — Available in 20mm, 25mm, 32mm, 40mm, and 50mm nominal diameters, covering the most common pipe sizes used in aquarium, pond, and hydroponic plumbing.\n      \u003c\/li\u003e\n      \u003cli\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\n        \u003cstrong\u003eTwo Fitting Geometries\u003c\/strong\u003e — Choose the 90° elbow for directional changes in tight spaces, or the straight connector for inline tank bulkhead pass-throughs and extensions.\n      \u003c\/li\u003e\n      \u003cli\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🌑\u003c\/span\u003e\n        \u003cstrong\u003eBlack Finish Reduces Algae Risk\u003c\/strong\u003e — The opaque black color blocks light from entering the pipe interior, reducing conditions that promote algae growth — particularly useful in aquarium sump and return line applications.\n      \u003c\/li\u003e\n      \u003cli\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e\n        \u003cstrong\u003eFlexible Pack Quantities\u003c\/strong\u003e — Order 1, 2, or 5 pieces per variant to match single-tank builds or larger multi-tank installations without over-purchasing.\n      \u003c\/li\u003e\n      \u003cli\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🔧\u003c\/span\u003e\n        \u003cstrong\u003eSolvent-Weld Compatible\u003c\/strong\u003e — Standard PVC solvent cement can be applied to create a permanent, leak-resistant bond with compatible PVC pipe — no specialist tools required for installation.\n      \u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-table-wrap\"\u003e\n    \u003ch2\u003e📐 Technical Specifications — PVC Pipe Fittings\u003c\/h2\u003e\n    \u003ctable\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eRigid PVC (Polyvinyl Chloride)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eColor\u003c\/th\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eAvailable Types\u003c\/th\u003e\n\u003ctd\u003e90° Elbow; Straight Connector\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eNominal Pipe Sizes\u003c\/th\u003e\n\u003ctd\u003e20mm (~¾ in), 25mm (~1 in), 32mm (~1¼ in), 40mm (~1½ in), 50mm (~2 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eWall Thickness\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eConnection Method\u003c\/th\u003e\n\u003ctd\u003eSolvent weld (PVC cement) or push-fit depending on pipe spec\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eMax Operating Temperature\u003c\/th\u003e\n\u003ctd\u003eContact us to confirm\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eMax Operating Pressure\u003c\/th\u003e\n\u003ctd\u003eContact us to confirm\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eTypical Applications\u003c\/th\u003e\n\u003ctd\u003eAquarium plumbing, pond filtration, hydroponics, tank bulkhead connections\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003ePacking Options\u003c\/th\u003e\n\u003ctd\u003e1 Pcs \/ 2 Pcs \/ 5 Pcs\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eWeight (per piece)\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-faq\"\u003e\n    \u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eHow do I choose between the 90° elbow and the straight connector?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eChoose the 90° elbow when you need to redirect flow around a corner or route pipe along a tank wall. Choose the straight connector when you need an inline bulkhead pass-through — for example, fitting through a tank wall or sump panel to connect two sections of pipe in a straight line.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhich pipe size should I select for my aquarium return line?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eMatch the fitting size to your existing pipe's nominal diameter. Common aquarium return lines use 20mm (¾ in) or 25mm (1 in) pipe for smaller tanks, while larger sumps and pond systems typically use 32mm (1¼ in) to 50mm (2 in). Measure your pipe's outer diameter and cross-reference with the nominal size before ordering.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eAre these fittings safe for use in aquariums with fish?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eRigid PVC is widely used in aquarium plumbing because it does not leach plasticizers into the water under normal conditions. However, always allow solvent-cemented joints to cure fully (typically 24–48 hours) and flush the system before introducing livestock, as fresh solvent cement fumes can be harmful.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eCan I use these fittings with flexible PVC or vinyl tubing?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThese fittings are designed for rigid PVC pipe with standard metric nominal diameters. Flexible PVC or vinyl tubing may have different wall thicknesses and outer diameters. A barbed adapter or compression fitting is typically needed to connect flexible tubing to rigid PVC fittings. Contact us to confirm compatibility with your specific tubing.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eHow strong is the joint once solvent-welded?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eA properly applied PVC solvent weld creates a chemical fusion between the fitting and pipe, forming a joint that is typically as strong as the pipe itself. The bond is permanent and leak-resistant when the correct PVC cement is used, surfaces are clean and dry, and the joint is allowed to cure before pressurizing.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWill the black PVC degrade outdoors or under UV exposure?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eStandard rigid PVC can become brittle with prolonged direct UV exposure over time. For outdoor pond or rainwater applications with direct sunlight, consider wrapping exposed pipe runs or using UV-stabilized PVC where available. For indoor aquarium and sump use, UV degradation is not a concern.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eHow many pieces should I order for a typical aquarium sump build?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eA basic single-overflow sump setup typically requires 2–4 elbows and 1–2 straight connectors depending on the pipe routing. The 5-piece pack offers the best value per fitting for builds requiring multiple connections of the same size. For a single repair or replacement, the 1-piece option avoids unnecessary surplus.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-cta\"\u003e\n    🛒 Select your size, type, and packing quantity above, then add to cart.\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do I choose between the 90° elbow and the straight connector?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Choose the 90° elbow when you need to redirect flow around a corner or route pipe along a tank wall. Choose the straight connector when you need an inline bulkhead pass-through — for example, fitting through a tank wall or sump panel to connect two sections of pipe in a straight line.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Which pipe size should I select for my aquarium return line?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Match the fitting size to your existing pipe's nominal diameter. Common aquarium return lines use 20mm (¾ in) or 25mm (1 in) pipe for smaller tanks, while larger sumps and pond systems typically use 32mm (1¼ in) to 50mm (2 in). Measure your pipe's outer diameter and cross-reference with the nominal size before ordering.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Are these fittings safe for use in aquariums with fish?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Rigid PVC is widely used in aquarium plumbing because it does not leach plasticizers into the water under normal conditions. However, always allow solvent-cemented joints to cure fully (typically 24–48 hours) and flush the system before introducing livestock, as fresh solvent cement fumes can be harmful.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I use these fittings with flexible PVC or vinyl tubing?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"These fittings are designed for rigid PVC pipe with standard metric nominal diameters. Flexible PVC or vinyl tubing may have different wall thicknesses and outer diameters. A barbed adapter or compression fitting is typically needed to connect flexible tubing to rigid PVC fittings. Contact us to confirm compatibility with your specific tubing.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How strong is the joint once solvent-welded?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"A properly applied PVC solvent weld creates a chemical fusion between the fitting and pipe, forming a joint that is typically as strong as the pipe itself. The bond is permanent and leak-resistant when the correct PVC cement is used, surfaces are clean and dry, and the joint is allowed to cure before pressurizing.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Will the black PVC degrade outdoors or under UV exposure?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Standard rigid PVC can become brittle with prolonged direct UV exposure over time. For outdoor pond or rainwater applications with direct sunlight, consider wrapping exposed pipe runs or using UV-stabilized PVC where available. For indoor aquarium and sump use, UV degradation is not a concern.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How many pieces should I order for a typical aquarium sump build?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"A basic single-overflow sump setup typically requires 2–4 elbows and 1–2 straight connectors depending on the pipe routing. The 5-piece pack offers the best value per fitting for builds requiring multiple connections of the same size. For a single repair or replacement, the 1-piece option avoids unnecessary surplus.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"20mm - 90° Elbow \/ 1 Pcs","offer_id":52331810980114,"sku":"QTLJBSGD00641x1","price":2.96,"currency_code":"USD","in_stock":true},{"title":"20mm - 90° Elbow \/ 2 Pcs","offer_id":52331811012882,"sku":"QTLJBSGD00641x2","price":5.17,"currency_code":"USD","in_stock":true},{"title":"20mm - 90° Elbow \/ 5 Pcs","offer_id":52331811045650,"sku":"QTLJBSGD00641x5","price":11.83,"currency_code":"USD","in_stock":true},{"title":"25mm - 90° Elbow \/ 1 Pcs","offer_id":52331811078418,"sku":"QTLJBSGD00642x1","price":4.19,"currency_code":"USD","in_stock":true},{"title":"25mm - 90° Elbow \/ 2 Pcs","offer_id":52331811111186,"sku":"QTLJBSGD00642x2","price":7.66,"currency_code":"USD","in_stock":true},{"title":"25mm - 90° Elbow \/ 5 Pcs","offer_id":52331811143954,"sku":"QTLJBSGD00642x5","price":18.02,"currency_code":"USD","in_stock":true},{"title":"32mm - 90° Elbow \/ 1 Pcs","offer_id":52331811176722,"sku":"QTLJBSGD00643x1","price":4.96,"currency_code":"USD","in_stock":true},{"title":"32mm - 90° Elbow \/ 2 Pcs","offer_id":52331811209490,"sku":"QTLJBSGD00643x2","price":9.22,"currency_code":"USD","in_stock":true},{"title":"32mm - 90° Elbow \/ 5 Pcs","offer_id":52331811242258,"sku":"QTLJBSGD00643x5","price":21.94,"currency_code":"USD","in_stock":true},{"title":"40mm - 90° Elbow \/ 1 Pcs","offer_id":52331811275026,"sku":"QTLJBSGD00644x1","price":6.02,"currency_code":"USD","in_stock":true},{"title":"40mm - 90° Elbow \/ 2 Pcs","offer_id":52331811307794,"sku":"QTLJBSGD00644x2","price":11.33,"currency_code":"USD","in_stock":true},{"title":"40mm - 90° Elbow \/ 5 Pcs","offer_id":52331811340562,"sku":"QTLJBSGD00644x5","price":27.24,"currency_code":"USD","in_stock":true},{"title":"50mm - 90° Elbow \/ 1 Pcs","offer_id":52331811373330,"sku":"QTLJBSGD00640x1","price":8.27,"currency_code":"USD","in_stock":true},{"title":"50mm - 90° Elbow \/ 2 Pcs","offer_id":52331811406098,"sku":"QTLJBSGD00640x2","price":15.78,"currency_code":"USD","in_stock":true},{"title":"50mm - 90° Elbow \/ 5 Pcs","offer_id":52331811438866,"sku":"QTLJBSGD00640x5","price":38.34,"currency_code":"USD","in_stock":true},{"title":"20mm - Straight \/ 1 Pcs","offer_id":52331811471634,"sku":"QTLJBSGD00639x1","price":2.9,"currency_code":"USD","in_stock":true},{"title":"20mm - Straight \/ 2 Pcs","offer_id":52331811504402,"sku":"QTLJBSGD00639x2","price":5.0,"currency_code":"USD","in_stock":true},{"title":"20mm - Straight \/ 5 Pcs","offer_id":52331811537170,"sku":"QTLJBSGD00639x5","price":11.41,"currency_code":"USD","in_stock":true},{"title":"25mm - Straight \/ 1 Pcs","offer_id":52331811569938,"sku":"QTLJBSGD00645x1","price":4.12,"currency_code":"USD","in_stock":true},{"title":"25mm - Straight \/ 2 Pcs","offer_id":52331811602706,"sku":"QTLJBSGD00645x2","price":7.48,"currency_code":"USD","in_stock":true},{"title":"25mm - Straight \/ 5 Pcs","offer_id":52331811635474,"sku":"QTLJBSGD00645x5","price":17.61,"currency_code":"USD","in_stock":true},{"title":"32mm - Straight \/ 1 Pcs","offer_id":52331811668242,"sku":"QTLJBSGD00646x1","price":4.83,"currency_code":"USD","in_stock":true},{"title":"32mm - Straight \/ 2 Pcs","offer_id":52331811701010,"sku":"QTLJBSGD00646x2","price":8.92,"currency_code":"USD","in_stock":true},{"title":"32mm - Straight \/ 5 Pcs","offer_id":52331811733778,"sku":"QTLJBSGD00646x5","price":21.2,"currency_code":"USD","in_stock":true},{"title":"40mm - Straight \/ 1 Pcs","offer_id":52331811766546,"sku":"QTLJBSGD00647x1","price":5.83,"currency_code":"USD","in_stock":true},{"title":"40mm - Straight \/ 2 Pcs","offer_id":52331811799314,"sku":"QTLJBSGD00647x2","price":10.95,"currency_code":"USD","in_stock":true},{"title":"40mm - Straight \/ 5 Pcs","offer_id":52331811832082,"sku":"QTLJBSGD00647x5","price":26.23,"currency_code":"USD","in_stock":true},{"title":"50mm - Straight \/ 1 Pcs","offer_id":52331811864850,"sku":"QTLJBSGD01115x1","price":6.57,"currency_code":"USD","in_stock":true},{"title":"50mm - Straight \/ 2 Pcs","offer_id":52331811897618,"sku":"QTLJBSGD01115x2","price":12.42,"currency_code":"USD","in_stock":true},{"title":"50mm - Straight \/ 5 Pcs","offer_id":52331811930386,"sku":"QTLJBSGD01115x5","price":29.87,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture1of21_d8706c44-e5da-44ba-b1da-d4c2a4019a6d.jpg?v=1781973641","url":"https:\/\/homediyer.com\/de\/products\/pvc-90-elbow-pipe-fittings-20-50mm-tank-connector-bulkhead-aquarium-black","provider":"HomeDIYer","version":"1.0","type":"link"}