Catalog Series · Tier 1 Precision
Engineered Closet Flanges & Core Drainage Systems
Explore our precision-machined closet flanges, adjustable assemblies, and associated commercial plumbing hardware built for zero-defect integration.
28+
Years Engineering (1998)
28,400 m²
Global Facility Footprint
Dual-Hub
China & Thailand Plants
100%
UPC / cUPC Traceability
Executive White Paper
The Critical Interface: Closet Flange Metallurgy & Hydraulics
In modern commercial and high-density residential developments, the toilet-to-drain connection is the single most vulnerable vector for hydrostatic failure and sewer gas infiltration.
Dezincification Resistance
Standard yellow brass alloys degrade rapidly when subjected to modern aggressive drain-cleaning chemicals and high-salinity sanitizing regimens. JANA utilizes certified lead-free C69300 / C46500 silicon and brass formulations engineered specifically to resist stress corrosion cracking and dezincification over multi-decade installation horizons.
360-Degree Adjustable Clamping
Traditional rigid closet flanges force contractors to align mounting bolts precisely before solvent-cementing waste pipes. Our JN-1601 and JN-1602 series incorporate full 360-degree corrosion-resistant stainless steel rotation rings that accommodate shifting subfloor tolerances without introducing torque tension to the toilet horn.
High Structural Tensile Profile
Commercial building standards mandate static load testing of wall-hung and floor-mounted fixtures up to 500 lbs (2.2 kN). JANA forged brass closet flanges maintain structural integrity under extreme flexure, preventing ring warpage and subsequent wax or elastomer gasket failure that causes subfloor rot.
Smart Manufacturing & Logistics
China Factory 4.0: Supply Chain Resilience & Precision
Mitigating geopolitical risks, tariff burdens, and production bottlenecks through a synchronized manufacturing ecosystem across Yuhuan, China and Kabinburi, Thailand.
Robotic CNC Cells
Manipulator-operated multi-axis CNC machines yield dimensional consistency within ±0.02 mm across every flange thread and sealing face.
Dual-Origin Strategy
Importers can originate orders from our Yuhuan headquarters or our 14,400 m² automated facility in Thailand to bypass single-region logistics risks.
Full Traceability
From raw ingot spectroscopic analysis to optical CMM scanning and final barcode scanning, every batch is registered to its ISO 9001 quality lot.
Scalable OEM Tooling
Internal tool & die shops accelerate bespoke engineering cycles, shifting custom private-label drawings to prototype samples in under 21 business days.
Engineering Roadmap
Macro Industry Solutions: Prefabrication & Modularity
How our flange engineering is answering the next-generation demands of Off-Site Construction (OSC) and modular bathroom pods.
Modular Pod Integration
Bathroom POD manufacturers operate under hyper-compressed assembly schedules. JANA pre-assembled metal-plastic hybrid closet flanges with self-locking silicone rings eliminate mess, cure-time delays, and installation errors in volumetric construction factories.
Zero-Perforation Push-Fit Seals
Eliminating chemical solvent welding in multi-family wood frame construction: Our next-generation push-fit closet flanges utilize multi-tier elastomeric ethylene propylene diene monomer (EPDM) ribs rated to withstand 15 PSI continuous backpressure without adhesive.
Circular Material Metallurgy
By shifting to 100% recycled high-purity scrap melted via electric arc induction furnaces, our green metallurgy initiative ensures our plumbing distributors achieve strict Scope 3 decarbonization benchmarks and LEED-certified infrastructure scoring.
| Series SKU | Material Metallurgy | Subfloor Connection | Ring Construction | Certification Compliance |
|---|---|---|---|---|
| JN-1601 Series | Forged Brass Body / ABS Hub | 3" Inside / 4" Over Drain Pipe | Corrosion-Resistant Stainless Ring | cUPC Listed, ASME A112.18.2 |
| JN-1602 Series | Ductile Iron / Red Brass | 4" Mechanical Joint Spigot | 360° Slotted Swivel Retainer | UPC, IAPMO R&T Listed |
| JN-9202 Series | Heavy-Duty Solid Cast Brass | Solder / Solvent Weld Hub | Integrated Integral Brass Hub | AB1953 Lead-Free, CSA B125.2 |
| JN-3001 Spud Series | Commercial Machined Brass | Direct Water Closet Spud Inlet | Dual Poly-Washer Clamping Nut | ASTM B584 Chemical Standard |
Enterprise Sourcing Standard
Global Procurement Criteria & Localized Compliance
How JANA protects master distributors, plumbing supply houses, and wholesale brands from regulatory friction and warranty liability.
North American Code Veracity
Our catalog conforms strictly to the International Plumbing Code (IPC) and Uniform Plumbing Code (UPC). Every lot is certified against ASME A112.18.2 / CSA B125.2, meeting mandatory IAPMO R&T inspection standards and NSF/ANSI 372 lead content standards.
Private-Label Retail Readiness
We deliver comprehensive OEM support: from barcode master cartons, blister clamshell contractor packaging, and ANSI compliant color coding, to direct EDI integration and pallet-load logistics designed for Home Depot, Lowe's, and Ferguson supply channels.
Localized Field Engineering
Navigating multi-unit jurisdictional variances requires deep technical familiarity. JANA supplies spec sheets, CAD/BIM Revit families, and custom submittal packages to help your engineering clients achieve rapid local municipal plan clearance.
Complementary Solutions
Commercial Strainers, Shower Drains & Bath Hardware
Heavy-duty plumbing assemblies manufactured to the identical mechanical and metallurgical tolerances as our flagship closet flanges.
Enterprise Procurement FAQ
Frequently Asked Questions: Closet Flange Engineering
Essential technical, compliance, and supply chain insights for purchasing directors, quality managers, and mechanical engineers.
What metallurgical criteria distinguish JANA solid brass closet flanges from standard market alloys?
Commercial closet flanges encounter prolonged exposure to sewer gases containing hydrogen sulfide (H2S), methane, and aggressive moisture vapor. Standard brass fittings containing high zinc percentages (above 15%) suffer from dezincification, which leaves a porous, mechanically weak copper matrix prone to catastrophic fracture under toilet bolt tension. JANA utilizes certified lead-free high-copper silicon brass and specially formulated forging alloys conforming to AB1953 and NSF/ANSI 372. This guarantees zero structural dezincification, maximum thread engagement strength, and lasting structural integrity for multi-decade life cycles.
How do your dual manufacturing bases in China and Thailand protect international buyers?
Operating our headquarters in Yuhuan, China (active since 1998) alongside our automated 14,400 m² manufacturing plant in Kabinburi Industrial Zone, Thailand (operational since Dec 2023) gives North American and European importers total geographic hedging. Buyers can strategically allocate POs to mitigate Section 301 tariffs, anti-dumping duties, and port congestions while maintaining uniform product tooling, standardized raw material feeds, unified UPC/cUPC listing certifications, and consistent ISO 9001 quality audits.
What are the exact dimensional and mechanical testing standards applied to closet flanges?
JANA closet flanges and closet spuds conform to ASME A112.18.2 / CSA B125.2 and ASTM standards. Each production batch undergoes strict quality gates: 1) Hydrostatic pressure testing to guarantee zero porosity in cast or forged hubs; 2) Torque testing on closet bolt slots exceeding 150 lbf-in without ear deformation; 3) Mechanical deflection evaluation simulating floor settling; and 4) Optical coordinate measurement machine (CMM) verification on 3-inch inside / 4-inch outside pipe clearance tolerances to ensure effortless jobsite slip-fit or solvent joint bonding.
Can JANA provide custom OEM/ODM packaging and engineering configurations for contractor kits?
Yes. Over 70% of our production volume represents private-label contract manufacturing for leading wholesale and retail supply chain brands. We support full custom configurations, including integrated test caps, pre-assembled closet bolts and wax-free silicone gaskets, customized stainless steel rotation rings, bespoke color-coded hubs (PVC white, ABS black, specialty finishes), laser-etched brand identities, and retail-ready shelf displays complete with UPC-A barcodes and EDI compatibility.
Why is an adjustable stainless steel or brass ring preferred over a solid PVC or ABS flange ring?
All-plastic one-piece closet flanges are susceptible to ring cracking during initial toilet bolt overtightening or subsequent seasonal floor shifting. Once a plastic flange ear snaps, fixing the leak often requires cutting into finished tile or concrete flooring. In contrast, our adjustable series (such as JN-1601 and JN-1602) feature a heavy-gauge stamped 300-series stainless steel or forged brass swivel ring that isolates mechanical mounting stresses from the plastic hub, allowing 360-degree rotation for effortless alignment while preventing cracked ears forever.