OEM & Wholesale Catalog
Precision Strainer Waste & Drain Assemblies (Part I)
Direct factory configurations manufactured to ASME A112.18.2 / CSA B125.2, UPC, and cUPC performance tolerances. Engineered for wholesale distributors, private-label fixture brands, and commercial contractors.
Global Industrial Outlook
The Commercial Landscape of Strainer Waste Engineering
In modern architectural plumbing, the kitchen sink strainer waste is no longer treated as an afterthought commodity. It represents the vital physical barrier preventing plumbing system blockages, mitigating sewer gas backflow, and withstanding aggressive thermal and chemical culinary waste streams.
Regulatory Tightening
Global plumbing safety codes have converged toward strict chemical non-leaching standards. The North American AB1953, NSF/ANSI 372 lead-free mandate, and European Drinking Water Directive have forced legacy casting foundries to transition entirely to virgin low-lead (C46500, CW617N) and austenitic stainless steels (SUS304/SUS316), obsoleting inferior recycled scrap alloys.
Architectural Finish Convergence
Modern consumer trends demand flawless aesthetic cohesion between kitchen faucets and drain strainer flanges. The market has rapidly pivoted from traditional electroplated chrome to Physical Vapor Deposition (PVD) finishes, including Matte Black, Brushed Gold, Gunmetal Gray, and Champagne Bronze, requiring micro-level adhesion stability and extreme abrasion resistance.
Supply Chain Redundancy
Geopolitical tariffs, anti-dumping duties, and maritime shipping volatilities have caused Tier-1 distributors to re-evaluate single-country dependencies. International purchasing directors now mandate a dual-origin manufacturing strategy, ensuring baseline capacity security across Chinese coastal hubs and Southeast Asian automated secondary plants.
Precision Metallurgical Architecture
Engineering Excellence: Forging, Stamping & Sealing Integrity
A failure in a kitchen sink strainer waste assembly causes catastrophic sub-counter cabinetry water damage and toxic mold formation. Jana Plumbing's engineering doctrine applies rigorous aerospace-grade mechanical tolerances to residential and commercial drainage bodies.
Solid Brass vs. Cold-Rolled Stamping
Our premium JN-1001 and JN-1004 series feature heavy-gauge solid forged brass bodies. Compared to budget zinc die-cast parts that suffer from intergranular corrosion or thin spun brass that distorts under plumbers' wrenches, our solid brass bodies maintain circularity under 120 N·m locknut tightening torques, eliminating gasket blowouts permanently.
CNC Threading & Hydraulic Coaxiality
Strainer tailpiece threads are precision cut via multi-axis CNC lathes rather than rolled over soft stampings. This ensures standard 1-1/2" NPSM external threads maintain pitch accuracy within ±0.03mm. The resulting interface threads smoothly into standard Schedule 40 PVC, ABS, or brass slip-joint tubular P-traps without cross-threading risks.
| Material Grade | Composition Specification | Tensile Strength (MPa) | Corrosion Resistance | Target Plumbing Application |
|---|---|---|---|---|
| C46500 Lead-Free Brass | Cu: 59-62%, Sn: 0.5-1.5%, Pb ≤ 0.25%, Zn Rem. | ≥ 420 MPa | Superior De-zincification Resistant | North American Commercial & Premium Residential Sinks |
| CW617N (EN 12165) | Cu: 57-59%, Pb: 1.6-2.5%, Fe ≤ 0.3%, Zn Rem. | ≥ 380 MPa | High Hydraulic Integrity | European Standard Strainer Wastes & Basin Traps |
| AISI 304 Stainless Steel | Cr: 18-20%, Ni: 8-10.5%, C ≤ 0.08%, Fe Rem. | ≥ 515 MPa | Pitting Resistant (PREN ≥ 19) | High-Volume Stainless Sink Bundles & RV Drainage |
| AISI 316 Marine Stainless | Cr: 16-18%, Ni: 10-14%, Mo: 2-3%, C ≤ 0.08% | ≥ 580 MPa | Extreme Acid/Chloride Resistant | Commercial Food Processing, Marine Vessels & Laboratories |
| Commercial Zinc Alloy (ZAMAK) | Al: 3.8-4.2%, Cu: 0.7-1.1%, Zn Remainder | ≤ 280 MPa | Prone to Pitting & Crevice Rust | Sub-standard Low-cost Retail (Not Produced by Jana) |
Global Market Localization
Tailored Application Scenarios: Regional Codes & Environments
Plumbing drainage codes vary drastically between geographic territories. A strainer waste engineered for a North American 3-1/2 inch disposal cutout cannot directly satisfy European 90mm basket waste standards or British 1-1/2" BSP requirements. Jana Plumbing delivers tailored SKUs engineered for specific regional plumbing architectures.
North American Residential (US & Canada)
Engineered strictly around 3-1/2" sink openings with standard 4-1/2" flange outer diameter. Incorporates 1-1/2" NPSM threads for connection with tailpieces and direct coupling to garbage disposal flange collars (JN-1301 / JN-1303). Certified to ASME A112.18.2 / CSA B125.2, featuring extra-thick closed-cell nitrile gaskets and friction rings for leak-free installations without messy plumber's putty.
UK & European Continental Standards
Tailored for European 90mm basket wastes and British 1-1/2" BSP parallel thread geometry conforming to EN 274. Features integrated side-overflow connection ports with rectangular or round overflow grates (JN-6106, JN-6107 flower style). Designed with smooth hydraulic interior chambers to reduce hair and grease entrapment in accordance with EU hygiene guidelines.
Australasian WaterMark Architecture
Configured to satisfy AS 1589 and AS/NZS 3500.2 standards. Employs 50mm connection diameters with de-zincification resistant (DR) brass alloys specifically rated to resist aggressive groundwater in Western Australia and regional areas. Features dual-lip rubber seals engineered for sustained high temperatures from commercial dishwashers.
Commercial Kitchens & Foodservice
High-flow deep cup waste assemblies (JN-1004-T / JN-1206) engineered for 3-compartment restaurant pot sinks. Includes stainless steel perforated crumb cups (JN-1104) and heavy-duty twist lever drain shutoffs that permit dishwashers to drain 100-liter boiling water basins without plunging hands into scalding grease traps.
RV, Tiny Homes & Marine Vessels
Compact bar sink strainers (JN-1201-T Junior Duo series) with 2" to 2-1/2" diameters designed specifically for shallow undermount RV basins and marine wet bars. Lightweight yet rugged brass body design engineered to withstand constant vehicle vibrations, frost-thaw cycles, and road-torsion stresses without loosening.
Multi-Family Residential Developments
High-durability contractor packs optimized for rapid modular assembly. Pre-assembled tailpiece configurations (JN-1001-1-T / JN-1001-2-T) reduce installer bench time by 40% on high-rise residential jobs. Features captive O-ring seals that prevent callbacks from tenant drain leaks or over-torqued plastic tailpieces.
Manufacturing Footprint & Trade Resilience
China Factory Ecosystem + Thailand Dual-Origin Hegemony
Over 28 years since our founding in 1998 in Yuhuan, Zhejiang—the world-renowned capital of brass plumbing valves—Jana Plumbing has built a vertically integrated manufacturing ecosystem that guarantees cost leadership, raw material supply security, and unmatched lead-time stability.
China Headquarters & Flagship Hub
Location: Yuhuan, Zhejiang, China (Operational Since 1998)
Core Focus: Heavy-gauge hydraulic forming, continuous stamping, advanced CNC threading, custom tool & die engineering, automated multi-head robotic polishing, and metallurgical laboratory analysis.
Ecosystem Advantage: Instant access to raw copper scrap refiners, automated electroplating industrial parks, and Ningbo/Shanghai deep-water ports for low-cost ocean logistics.
Thailand Production Facility (Gateway Enterprise)
Location: Kabinburi Industrial Zone, Prachinburi, Thailand (Dec 2023)
Core Focus: 14,400 m² modern facility equipped with high-automation assembly, automated progressive stamping lines, leak-testing stations, and North American retail packaging cells.
Strategic Advantage: Provides US & European buyers complete tariff mitigation, circumvents Section 301 duties, and satisfies strict country-of-origin procurement mandates without re-qualifying tooling.
01. Raw Material Hedging
Direct mill-contract sourcing of electrolytic copper cathode and virgin zinc ingots ensures consistent alloy chemistry and cushions clients against LME market volatility.
02. Hydraulic Stamping
500-ton hydraulic deep-drawing presses craft seamless stainless steel and brass strainer cups with uniform wall thickness, eliminating localized thinning weak spots.
03. Robotic Polishing
6-axis robotic polishing arms generate a mirror Class-A surface finish without manual buffing wave imperfections, optimizing substrate adhesion for PVD coatings.
04. Helium Mass Leak Testing
Every batch undergoes 100% pneumatic submersion and vacuum decay tests to verify that rubber stoppers, ball locks, and waste bodies hold zero-leakage seals at 0.05 MPa.
R&D Engineering Roadmap
Technological Roadmap: The Next Generation of Drain Waste
At Jana Plumbing, our engineering team continuously challenges traditional sink waste mechanics. By integrating material science, fluid dynamics, and automated sealing architectures, we are defining the future trajectory of sanitary drainage hardware.
Phase I
Lead-Free Eco-Brass Alloys
Transitioning standard commercial lines to silicon-brass and bismuth-brass formulations (C46500) that achieve zero lead leaching (<0.05%) while matching traditional machinability and cutting tool speeds.
Phase II
Plasma PVD Nanotech Coatings
Deploying vacuum cathodic arc evaporation PVD coating chambers to apply titanium nitride (TiN) and zirconium carbonitride (ZrCN) finishes that survive 1,000+ hours in ASTM B117 salt spray tests.
Phase III
Magnetic Click-Seal Mechanisms
Replacing conventional friction rubber ball bearings and mechanical spring balls with neodymium magnetic levitation stoppers that provide everlasting tactile snap-action without mechanical fatigue.
Phase IV
Smart IoT Drainage & FOG Sensing
Prototyping commercial smart strainers with integrated turbidity and temperature sensors to alert restaurant kitchen operators before fats, oils, and grease (FOG) solidify into severe sewer blockages.
Verified Global Compliance
Compliance Safeguards: Certificates That Protect Your Brand
Importing plumbing hardware into North America and Europe requires complete technical file transparency. Non-compliant drain components risk immediate impoundment by customs or multi-million dollar water damage liability. Jana Plumbing delivers fully documented third-party verified assurance.
UPC & cUPC Listings (IAPMO)
Our strainer waste and lavatory drain assemblies hold valid Certificate of Listings (Certificate Nos. 6229, 8175, 12307, N-11587, T-11586) issued by IAPMO R&T, proving conformity to Uniform Plumbing Code (UPC®) and Canadian National Plumbing Code.
California AB1953 & NSF/ANSI 372
Independently certified wetted surface lead content below 0.25% weighted average. Backed by regular optical emission spectroscopy (OES) heat lot inspection reports, fully clearing California Health and Safety Code enforcement audits.
ISO 9001:2015 & BRC Audited
Our quality management system is certified to ISO 9001 standards with full lot traceability from incoming brass rod to boxed retail cartons. Our manufacturing plants pass annual social responsibility and retail compliance audits from Fortune 500 home improvement centers.
Procurement & Technical Consultation
Frequently Asked Engineering Questions
Critical insights for plumbing engineers, OEM category managers, and wholesale sourcing directors evaluating strainer waste production partners.
What specific product families are manufactured by Jana Plumbing?
Jana Plumbing manufactures 16 complete sanitary drainage and fixture lines: heavy-duty solid brass kitchen sink strainers, 304 stainless steel basket strainers, junior duo bar sink strainers (JN-1201-T), garbage disposer flanges & stopper sets (JN-1301, JN-1303), crumb cups (JN-1104), replacement strainer baskets (JN-1102, JN-1111), offset and straight lavatory popup drains (JN-5001, JN-5014, JN-5020), bath overflow wastes & trip levers (JN-6106), brass shower drains, closet toilet flanges, brass meter couplings (JN-3003), toilet tank levers (JN-2005), bottom sink grids, braided stainless hoses, shower arms/flanges, and custom PVD finished drainage hardware.
What are the primary structural differences between brass sink strainers and stainless steel sink strainers?
Solid brass sink strainers (such as our flagship JN-1001-1 and JN-1001-2) feature heavy-gauge cast or forged bodies paired with precision-machined NPSM threads. Brass provides unmatched structural mass, dampens garbage disposal vibration harmonic noise, resists thread stripping when over-torqued by commercial installers, and accommodates intricate decorative electroplated and PVD finishes. Stainless steel strainers (AISI 304) are stamped from cold-rolled sheet metal; they offer exceptional chemical resistance to harsh acids, lighter shipping weights, and highly competitive pricing for high-volume retail bundle packages.
How does your factory prevent galvanic corrosion between brass strainers and stainless steel sinks?
Galvanic coupling occurs when dissimilar metals come into electrical contact in the presence of an electrolyte. Our strainer waste sets include high-dielectric insulating gaskets—engineered using closed-cell ethylene propylene diene monomer (EPDM) or non-hardening nitrile rubber, paired with a low-friction polyethylene slip ring. This assembly completely isolates the solid brass flange from the bottom surface of the stainless steel sink basin, preventing electrochemical potential transfer and eliminating surface crevice corrosion.
How does your Thailand facility assist US and European importers with tariffs and trade security?
Our Gateway Enterprise Corporation (Thailand) plant in Kabinburi Industrial Zone, Prachinburi Province, covers 14,400 m² and operates automated progressive stamping and robotic assembly cells. For US importers subject to Section 301 tariffs on Chinese plumbing imports (List 3/4), sourcing products directly from our certified Thailand plant qualifies for Thailand Certificate of Origin (Form D / COO), eliminating extra punitive tariffs legally while maintaining identical tooling, engineering tolerances, and ISO 9001 / cUPC certifications held by our China headquarters.
Can you develop custom OEM designs, embossed branding, and proprietary decorative finishes?
Yes. Over 70% of our production volume is dedicated to private-label manufacturing and OEM custom co-development. Our in-house tooling center designs progressive stamping dies and forging molds within 25 days based on client 3D STEP files or physical samples. We provide laser engraving or deep-stamp embossing of brand logos on strainer stoppers and baskets. Our surface treatment division supports custom PVD and electroplated finishes, including Matte Black, Brushed Brass, Satin Nickel, Gunmetal, Antique Bronze, and Polished Chrome, with strict color delta (ΔE ≤ 0.5) spectrophotometer matching.
What quality control protocols are applied to verify leak-free strainer waste operation?
Quality control is embedded at every manufacturing step: 1) Chemical spectrometry analysis verifies virgin ingot purity before melting; 2) CMM coordinate measuring machines check thread pitch, concentricity, and flange angles; 3) 100% of finished strainer waste bodies undergo dry pneumatic pressure decay testing at 50 kPa to verify casting porosity absence; 4) Basket stoppers are tested in water immersion basins for 24-hour static head seal retention with zero loss; 5) Packaging lines utilize automated barcode verification to guarantee correct hardware kits and instructions are enclosed.
OEM & Wholesale Catalog
Precision Strainer Waste & Drain Assemblies (Part II)
Heavy-duty junior duo bar strainers, disposer flange sets, heavy brass kitchen strainers, and two-piece lavatory assemblies built for long-term commercial performance.
