{"product_id":"pvc-eccentric-reducer-bush-adhesive-fittings-dwv","title":"PVC Eccentric Reducer Bush Water Adhesive Fittings 50  75 110mm Drain Waste Vent","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003ePVC Eccentric Reducer Bush — Reliable Size Transitions for Drain, Waste \u0026amp; Vent Systems\u003c\/h2\u003e\n\u003cp\u003eWhen a plumbing run demands a smooth pipe-size transition without disrupting the invert level, a standard concentric reducer simply won't do. Contractors, maintenance plumbers, and confident DIYers working on drain, waste, and vent (DWV) systems rely on the PVC eccentric reducer bush to keep the pipe bottom flush — preventing pooling and maintaining consistent flow in low-gradient horizontal runs.\u003c\/p\u003e\n\u003cp\u003eThese eccentric reducer bushes are manufactured from uPVC (unplasticised polyvinyl chloride) and are designed for solvent-cement (water adhesive) installation. Available in two sizes — 75 × 50mm (~3\" × 2\") and 110 × 50mm (~4\" × 2\") — each bush steps down from a larger socket to a smaller spigot while offsetting the bore to one side, keeping the pipe invert aligned. Wall thickness and socket depth conform to typical DWV fitting standards.\u003c\/p\u003e\n\u003cp\u003eTypical applications include reducing branch connections in bathroom waste stacks, transitioning between soil pipe diameters in residential drain systems, and adapting existing 110mm (~4\") underground drainage to 50mm (~2\") internal waste lines — all common scenarios where an eccentric reducer bush for DWV plumbing outperforms a standard concentric fitting.\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 uPVC solvent-weld DWV systems. Compatible with standard AS\/NZS 1260, BS EN 1329, and equivalent-dimension pipe and fittings. Confirm pipe OD and socket depth before ordering.\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These PVC Eccentric Reducer Bushes\u003c\/h2\u003e\n\u003cdiv class=\"hdiy-list\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\u003cstrong\u003eEccentric Bore Design\u003c\/strong\u003e\u003cbr\u003eOffset bore keeps the pipe invert (bottom) flush across the size change — essential for maintaining gravity flow in horizontal DWV runs without creating a low-point trap.\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\u003cstrong\u003eSolvent-Cement (Water Adhesive) Joint\u003c\/strong\u003e\u003cbr\u003ePush-fit socket accepts standard PVC solvent cement for a fast, leak-free, permanent bond. No threading, no gaskets, no special tools required beyond a brush and cleaner.\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e\u003cstrong\u003euPVC Construction\u003c\/strong\u003e\u003cbr\u003eUnplasticised PVC resists corrosion, scale build-up, and chemical attack from typical household waste streams. Rated for continuous use in above-ground and below-slab DWV applications.\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e\u003cstrong\u003eTwo Size Options\u003c\/strong\u003e\u003cbr\u003e75 × 50mm (~3\" × 2\") and 110 × 50mm (~4\" × 2\") cover the most common residential and light-commercial reducer transitions in soil and waste stacks.\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚖️\u003c\/span\u003e\u003cstrong\u003eLightweight \u0026amp; Easy to Handle\u003c\/strong\u003e\u003cbr\u003eLow mass simplifies overhead and confined-space installation. Each bush can be dry-fitted and adjusted before cementing, reducing rework on complex branch layouts.\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hdiy-icon\"\u003e✔️\u003c\/span\u003e\u003cstrong\u003eConsistent Dimensional Tolerances\u003c\/strong\u003e\u003cbr\u003eSocket depth and spigot OD are held to tight tolerances to ensure reliable engagement with standard DWV pipe, minimising the risk of pull-out or misalignment after cementing.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — PVC Eccentric Reducer Bush\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003euPVC (Unplasticised Polyvinyl Chloride)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eConnection Type\u003c\/th\u003e\n\u003ctd\u003eSolvent cement (water adhesive) socket × spigot\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Sizes\u003c\/th\u003e\n\u003ctd\u003e75 × 50mm \/ 110 × 50mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBore Type\u003c\/th\u003e\n\u003ctd\u003eEccentric (offset invert)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eDrain, Waste \u0026amp; Vent (DWV) — above-ground and below-slab\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eColour\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\u003ePressure Rating\u003c\/th\u003e\n\u003ctd\u003eNon-pressure \/ gravity DWV service\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCompatible Standards\u003c\/th\u003e\n\u003ctd\u003eAS\/NZS 1260, BS EN 1329 (confirm local code)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eQuantity per Pack\u003c\/th\u003e\n\u003ctd\u003e1 Pcs\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\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between an eccentric and a concentric reducer bush?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eA concentric reducer bush centres the smaller bore inside the larger one, so the pipe centreline shifts but both top and bottom change equally. An eccentric reducer bush offsets the bore so that one side (typically the bottom\/invert) stays flat. This is critical in horizontal DWV runs where you need to maintain a consistent invert level to preserve gravity flow and avoid creating a low-point that traps solids or water.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhich size should I choose — 75 × 50mm or 110 × 50mm?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eMatch the larger socket to your existing pipe OD. If your main soil or waste pipe is 75mm (~3\"), choose the 75 × 50mm bush. If it is 110mm (~4\") — the most common residential soil pipe size — choose the 110 × 50mm bush. The 50mm spigot end connects to standard 50mm (~2\") waste pipe from basins, baths, or showers.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use this fitting underground or below a concrete slab?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003euPVC DWV fittings are routinely used in below-slab drainage when properly bedded and backfilled per local plumbing codes. The solvent-cement joint forms a rigid, watertight bond suitable for buried service. Always verify that the fitting meets your local authority's approved product list before installation in concealed or underground locations.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat solvent cement should I use, and do I need a primer?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eUse a uPVC-rated solvent cement (often labelled \"PVC pipe cement\" or \"water adhesive\") appropriate for DWV applications. In many regions a dedicated PVC primer or cleaner is recommended or required by code to degrease and soften the mating surfaces before cementing. Follow the cement manufacturer's cure time — typically 15–30 minutes before handling and 24 hours before pressure or flow testing.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs this fitting resistant to household chemicals and cleaning agents?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003euPVC has good resistance to dilute acids, alkalis, and the range of household cleaning products, detergents, and drain cleaners typically encountered in residential waste systems. It is not suitable for concentrated solvents, ketones, or aromatic hydrocarbons. For commercial or industrial waste streams containing aggressive chemicals, confirm chemical compatibility before specifying.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I ensure a leak-free solvent-cement joint on this bush?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eCut the pipe square and deburr the end. Dry-fit first to confirm depth and alignment. Apply primer\/cleaner to both the spigot OD and socket ID, then apply an even coat of solvent cement to both surfaces. Push the spigot firmly into the socket with a slight twist, hold for 30 seconds, and wipe away excess cement. Avoid disturbing the joint for at least 15 minutes. A small bead of cement around the socket mouth confirms full coverage.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan this reducer bush be used in a venting (vent stack) application?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. uPVC eccentric reducer bushes are suitable for vent stack size transitions as well as waste and soil lines. In a vertical vent application the eccentric offset is less critical than in horizontal runs, but the fitting performs identically. Ensure all vent connections comply with your local plumbing code regarding minimum pipe diameters and vent termination requirements.\u003c\/p\u003e\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"hdiy-cta\"\u003e\n🛒 Select your size 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\": \"What is the difference between an eccentric and a concentric reducer bush?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"A concentric reducer bush centres the smaller bore inside the larger one, so the pipe centreline shifts but both top and bottom change equally. An eccentric reducer bush offsets the bore so that one side (typically the bottom\/invert) stays flat. This is critical in horizontal DWV runs where you need to maintain a consistent invert level to preserve gravity flow and avoid creating a low-point that traps solids or water.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Which size should I choose — 75 × 50mm or 110 × 50mm?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Match the larger socket to your existing pipe OD. If your main soil or waste pipe is 75mm (~3\\\"), choose the 75 × 50mm bush. If it is 110mm (~4\\\") — the most common residential soil pipe size — choose the 110 × 50mm bush. The 50mm spigot end connects to standard 50mm (~2\\\") waste pipe from basins, baths, or showers.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I use this fitting underground or below a concrete slab?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"uPVC DWV fittings are routinely used in below-slab drainage when properly bedded and backfilled per local plumbing codes. The solvent-cement joint forms a rigid, watertight bond suitable for buried service. Always verify that the fitting meets your local authority's approved product list before installation in concealed or underground locations.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What solvent cement should I use, and do I need a primer?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Use a uPVC-rated solvent cement (often labelled 'PVC pipe cement' or 'water adhesive') appropriate for DWV applications. In many regions a dedicated PVC primer or cleaner is recommended or required by code to degrease and soften the mating surfaces before cementing. Follow the cement manufacturer's cure time — typically 15–30 minutes before handling and 24 hours before pressure or flow testing.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is this fitting resistant to household chemicals and cleaning agents?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"uPVC has good resistance to dilute acids, alkalis, and the range of household cleaning products, detergents, and drain cleaners typically encountered in residential waste systems. It is not suitable for concentrated solvents, ketones, or aromatic hydrocarbons. For commercial or industrial waste streams containing aggressive chemicals, confirm chemical compatibility before specifying.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do I ensure a leak-free solvent-cement joint on this bush?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Cut the pipe square and deburr the end. Dry-fit first to confirm depth and alignment. Apply primer\/cleaner to both the spigot OD and socket ID, then apply an even coat of solvent cement to both surfaces. Push the spigot firmly into the socket with a slight twist, hold for 30 seconds, and wipe away excess cement. Avoid disturbing the joint for at least 15 minutes. A small bead of cement around the socket mouth confirms full coverage.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can this reducer bush be used in a venting (vent stack) application?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. uPVC eccentric reducer bushes are suitable for vent stack size transitions as well as waste and soil lines. In a vertical vent application the eccentric offset is less critical than in horizontal runs, but the fitting performs identically. Ensure all vent connections comply with your local plumbing code regarding minimum pipe diameters and vent termination requirements.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"75 x 50mm \/ 1 Pcs","offer_id":52331792531730,"sku":"FAS021132x1","price":6.69,"currency_code":"USD","in_stock":true},{"title":"110 x 50mm \/ 1 Pcs","offer_id":52331792564498,"sku":"FAS021133x1","price":11.26,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Main-01_60aebfd6-3c19-4cce-be68-52f9d9ff3f6c.jpg?v=1781963832","url":"https:\/\/homediyer.com\/products\/pvc-eccentric-reducer-bush-adhesive-fittings-dwv","provider":"HomeDIYer","version":"1.0","type":"link"}