{"product_id":"u-pvc-fish-water-tank-inlet-outlet-water-pipe-fittings-joint-id-thread-connector","title":"U-PVC Fish Water Tank Inlet Outlet Water Pipe Fittings Joint ID Thread Connector","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eU-PVC Water Tank Inlet Outlet Pipe Fittings — Leak-Free ID Thread Connectors for Aquariums and Water Systems\u003c\/h2\u003e\n\u003cp\u003eA leaking tank bulkhead or a poorly sealed pipe joint can drain a fish pond overnight, flood an equipment cabinet, or contaminate a water storage system. Aquarium hobbyists, pond builders, aquaculture operators, and water-treatment installers who need a reliable, chemical-resistant through-wall connection rely on properly rated fittings that thread securely and hold pressure without weeping. These U-PVC water tank inlet outlet pipe fittings with ID thread connectors are designed to deliver exactly that — a clean, repeatable seal every time.\u003c\/p\u003e\n\u003cp\u003eEach fitting is machined or injection-molded from rigid unplasticized PVC (U-PVC), which offers superior dimensional stability and resistance to chlorine, saltwater, and most aquatic chemicals compared to standard PVC. The connectors use an inner-diameter (ID) thread profile, allowing them to mate directly with standard threaded pipe ends or tank-wall fittings. Available inner diameters span 20 mm (¾ in), 25 mm (1 in), 32 mm (1¼ in), 40 mm (1½ in), 50 mm (2 in), and 63 mm (2½ in), covering the most common pipe sizes used in residential and light-commercial water systems. Quantity options of 1, 2, 3, or 5 pieces per order let you stock exactly what a single repair or a multi-outlet manifold requires.\u003c\/p\u003e\n\u003cp\u003eTypical applications include freshwater and marine aquarium through-tank bulkhead connections, koi pond inlet and return fittings, aquaculture recirculating system manifolds, rainwater harvesting tank outlets, and irrigation header connections where a threaded, removable joint is preferred over a solvent-welded permanent bond. The ID thread design also makes these connectors suitable for filter housing inlets, UV sterilizer plumbing, and sump-to-display-tank return lines.\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\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for standard U-PVC threaded pipe systems. Inner diameters from 20 mm to 63 mm. Confirm your pipe thread standard (BSP \/ NPT) and pipe schedule before ordering — see variant options for exact sizing.\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These U-PVC Water Tank Pipe Fittings\u003c\/h2\u003e\n\u003cul class=\"hdiy-list\"\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e💧\u003c\/span\u003e\u003cstrong\u003eLeak-free ID thread connection\u003c\/strong\u003e — the inner-diameter thread profile engages the full circumference of the mating pipe end, distributing clamping force evenly and eliminating the off-center gaps that cause drips in push-fit or compression joints.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🧪\u003c\/span\u003e\u003cstrong\u003eRigid U-PVC construction\u003c\/strong\u003e — unplasticized PVC maintains its shape under sustained water pressure and does not soften or creep at typical aquarium and pond operating temperatures (up to approximately 60 °C \/ 140 °F).\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔬\u003c\/span\u003e\u003cstrong\u003eChemical and corrosion resistance\u003c\/strong\u003e — U-PVC is inert to chlorinated tap water, saltwater, dilute acids, and most aquarium treatments, making it safe for both freshwater and marine systems without risk of metal ion leaching.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\u003cstrong\u003eSix inner diameter options\u003c\/strong\u003e — 20 mm, 25 mm, 32 mm, 40 mm, 50 mm, and 63 mm cover the full range from small nano-tank return lines up to large pond circulation headers, so you can match the fitting precisely to your existing pipe.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e\u003cstrong\u003eFlexible quantity packs\u003c\/strong\u003e — order 1, 2, 3, or 5 pieces per variant to cover a single repair, a symmetrical dual-outlet setup, or a multi-tank manifold without over-ordering.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\u003cstrong\u003eRemovable and re-sealable\u003c\/strong\u003e — the threaded connection can be disassembled for maintenance, filter cleaning, or system reconfiguration without cutting pipe, unlike solvent-welded fittings that require destructive removal.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — U-PVC Tank Inlet Outlet Pipe Fittings\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eU-PVC (unplasticized polyvinyl chloride)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eConnection Type\u003c\/th\u003e\n\u003ctd\u003eID (inner diameter) thread connector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Inner Diameters\u003c\/th\u003e\n\u003ctd\u003e20 mm, 25 mm, 32 mm, 40 mm, 50 mm, 63 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eApproximate Inch Equivalents\u003c\/th\u003e\n\u003ctd\u003e¾ in, 1 in, 1¼ in, 1½ in, 2 in, 2½ in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eQuantity Options\u003c\/th\u003e\n\u003ctd\u003e1 PCS, 2 PCS, 3 PCS, 5 PCS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eThread Standard\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOperating Temperature\u003c\/th\u003e\n\u003ctd\u003eTypically up to 60 °C (140 °F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eColor \/ Finish\u003c\/th\u003e\n\u003ctd\u003eSee variant options\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\u003eOuter Diameter\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eAquariums, fish ponds, aquaculture systems, rainwater tanks, irrigation headers, filter housing plumbing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCertifications \/ Standards\u003c\/th\u003e\n\u003ctd\u003eContact us to confirm\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 the correct inner diameter for my tank or pipe?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eMeasure the inner diameter (ID) of your existing pipe with a caliper. Common aquarium return-line sizes are 20 mm (¾ in) and 25 mm (1 in); pond circulation lines typically use 32 mm (1¼ in) to 50 mm (2 in); large aquaculture or rainwater systems often use 63 mm (2½ in). If you are measuring a threaded fitting rather than the pipe bore, measure the thread root diameter and match it to the closest ID option. Contact us if you need confirmation.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eAre these fittings safe for use in fish tanks and marine aquariums?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. U-PVC is chemically inert and does not leach plasticizers, heavy metals, or other compounds into the water. It is widely used in both freshwater and marine aquarium plumbing. The material is also resistant to saltwater corrosion, making it suitable for reef and marine systems where metal fittings would corrode over time.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between U-PVC and standard PVC fittings?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eStandard PVC (plasticized PVC) contains added plasticizers to make it flexible, which can leach into water over time and reduce dimensional stability under pressure. U-PVC (unplasticized PVC) contains no plasticizers, making it harder, more dimensionally stable, and safer for potable and aquatic water contact. U-PVC is the correct choice for pressure-rated pipe systems and aquarium plumbing.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eCan I use PTFE tape or thread sealant with these fittings?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. Wrapping the male thread with 2–3 layers of PTFE (plumber’s) tape before assembly is recommended to ensure a watertight seal and to prevent galling of the PVC threads. Avoid over-tightening — hand-tight plus approximately one quarter-turn with a strap wrench is typically sufficient. Do not use petroleum-based pipe dopes, which can degrade PVC over time.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eHow strong are these fittings under water pressure?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eU-PVC fittings are rated for typical low-to-medium pressure water systems. For aquarium and pond applications, operating pressures are generally well within the material’s capability. For pressurized irrigation or mains-pressure connections, verify the pressure rating with us before installation, as the exact rating depends on pipe schedule and fitting wall thickness.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails\u003e\n\u003csummary\u003eCan these fittings be disassembled and reused?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. The threaded ID connection is designed to be removable. You can unscrew the fitting for filter maintenance, system reconfiguration, or seasonal pond draining, then reassemble with fresh PTFE tape. Inspect the threads for wear or cracking before each reassembly. Unlike solvent-welded joints, no cutting or pipe replacement is required.\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 setup?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eA standard sump setup with one drain and one return line requires 2 fittings — select the 2 PCS option for convenience. A dual-drain Herbie or Bean Animal overflow typically needs 3 fittings (two drains, one emergency). For a multi-tank fish room with a shared sump, the 5 PCS pack covers most manifold configurations. Match the quantity to the number of through-wall penetrations in your build.\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 inner diameter and 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 the correct inner diameter for my tank or pipe?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Measure the inner diameter (ID) of your existing pipe with a caliper. Common aquarium return-line sizes are 20 mm and 25 mm; pond lines typically use 32–50 mm; large systems use 63 mm. Contact us if you need confirmation.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Are these fittings safe for use in fish tanks and marine aquariums?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. U-PVC is chemically inert, does not leach plasticizers or heavy metals, and is resistant to saltwater corrosion, making it safe for both freshwater and marine aquarium plumbing.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the difference between U-PVC and standard PVC fittings?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"U-PVC contains no plasticizers, making it harder, more dimensionally stable, and safer for water contact than standard plasticized PVC. It is the correct choice for pressure-rated pipe systems and aquarium plumbing.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I use PTFE tape or thread sealant with these fittings?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. Apply 2–3 layers of PTFE tape to the male thread before assembly. Hand-tight plus approximately one quarter-turn with a strap wrench is sufficient. Avoid petroleum-based pipe dopes.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How strong are these fittings under water pressure?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"U-PVC fittings handle typical aquarium and pond pressures comfortably. For mains-pressure or irrigation use, verify the pressure rating with us before installation.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can these fittings be disassembled and reused?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. The threaded ID connection is removable and reusable. Reassemble with fresh PTFE tape and inspect threads for wear before each use.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How many pieces should I order for a typical aquarium sump setup?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"A standard sump with one drain and one return needs 2 PCS. A dual-drain overflow needs 3 PCS. A multi-tank fish room manifold is typically covered by the 5 PCS pack.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"20mm \/ 1PCS","offer_id":52331955552530,"sku":"GLFBTXJGLBZSJ021941x1","price":16.95,"currency_code":"USD","in_stock":true},{"title":"20mm \/ 2PCS","offer_id":52331955585298,"sku":"GLFBTXJGLBZSJ021941x2","price":31.99,"currency_code":"USD","in_stock":true},{"title":"20mm \/ 3PCS","offer_id":52331955618066,"sku":"GLFBTXJGLBZSJ021941x3","price":47.0,"currency_code":"USD","in_stock":true},{"title":"20mm \/ 5PCS","offer_id":52331955650834,"sku":"GLFBTXJGLBZSJ021941x5","price":77.06,"currency_code":"USD","in_stock":true},{"title":"25mm \/ 1PCS","offer_id":52331955683602,"sku":"GLFBTXJGLBZSJ021942x1","price":20.84,"currency_code":"USD","in_stock":true},{"title":"25mm \/ 2PCS","offer_id":52331955716370,"sku":"GLFBTXJGLBZSJ021942x2","price":39.74,"currency_code":"USD","in_stock":true},{"title":"25mm \/ 3PCS","offer_id":52331955749138,"sku":"GLFBTXJGLBZSJ021942x3","price":58.64,"currency_code":"USD","in_stock":true},{"title":"25mm \/ 5PCS","offer_id":52331955781906,"sku":"GLFBTXJGLBZSJ021942x5","price":96.45,"currency_code":"USD","in_stock":true},{"title":"32mm \/ 1PCS","offer_id":52331955814674,"sku":"GLFBTXJGLBZSJ021943x1","price":25.38,"currency_code":"USD","in_stock":true},{"title":"32mm \/ 2PCS","offer_id":52331955847442,"sku":"GLFBTXJGLBZSJ021943x2","price":48.8,"currency_code":"USD","in_stock":true},{"title":"32mm \/ 3PCS","offer_id":52331955880210,"sku":"GLFBTXJGLBZSJ021943x3","price":72.24,"currency_code":"USD","in_stock":true},{"title":"32mm \/ 5PCS","offer_id":52331955912978,"sku":"GLFBTXJGLBZSJ021943x5","price":119.11,"currency_code":"USD","in_stock":true},{"title":"40mm \/ 1PCS","offer_id":52331955945746,"sku":"GLFBTXJGLBZSJ021944x1","price":31.61,"currency_code":"USD","in_stock":true},{"title":"40mm \/ 2PCS","offer_id":52331955978514,"sku":"GLFBTXJGLBZSJ021944x2","price":61.28,"currency_code":"USD","in_stock":true},{"title":"40mm \/ 3PCS","offer_id":52331956011282,"sku":"GLFBTXJGLBZSJ021944x3","price":90.96,"currency_code":"USD","in_stock":true},{"title":"40mm \/ 5PCS","offer_id":52331956044050,"sku":"GLFBTXJGLBZSJ021944x5","price":150.33,"currency_code":"USD","in_stock":true},{"title":"50mm \/ 1PCS","offer_id":52331956076818,"sku":"GLFBTXJGLBZSJ021945x1","price":38.92,"currency_code":"USD","in_stock":true},{"title":"50mm \/ 2PCS","offer_id":52331956109586,"sku":"GLFBTXJGLBZSJ021945x2","price":75.92,"currency_code":"USD","in_stock":true},{"title":"50mm \/ 3PCS","offer_id":52331956142354,"sku":"GLFBTXJGLBZSJ021945x3","price":112.91,"currency_code":"USD","in_stock":true},{"title":"50mm \/ 5PCS","offer_id":52331956175122,"sku":"GLFBTXJGLBZSJ021945x5","price":186.89,"currency_code":"USD","in_stock":true},{"title":"63mm \/ 1PCS","offer_id":52331956207890,"sku":"GLFBTXJGLBZSJ021946x1","price":44.83,"currency_code":"USD","in_stock":true},{"title":"63mm \/ 2PCS","offer_id":52331956240658,"sku":"GLFBTXJGLBZSJ021946x2","price":87.75,"currency_code":"USD","in_stock":true},{"title":"63mm \/ 3PCS","offer_id":52331956273426,"sku":"GLFBTXJGLBZSJ021946x3","price":130.64,"currency_code":"USD","in_stock":true},{"title":"63mm \/ 5PCS","offer_id":52331956306194,"sku":"GLFBTXJGLBZSJ021946x5","price":216.43,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Main-01_6c8d5b6c-6d34-4ddd-bf07-20a71210e045.jpg?v=1782099075","url":"https:\/\/homediyer.com\/products\/u-pvc-fish-water-tank-inlet-outlet-water-pipe-fittings-joint-id-thread-connector","provider":"HomeDIYer","version":"1.0","type":"link"}