90 degree downspout & gutter elbow for drain roof | Manufacturer

Buying through trading agents adds a significant cost layer. A comparative 2025 procurement study found that direct-from-factory sourcing of pipe fittings reduces total landed costs by an average of 37% compared to multi-tier distributor chains.

Elbows with zinc coating below 275 g/m² develop red-rust streaks on building facades within 3–5 years, triggering costly rework and warranty claims. Poor coating adherence is the #1 cause of premature gutter elbow replacement in coastal climates.

Off-spec socket depths or bend radii (beyond ±1.0 mm tolerance) cause field-fitting nightmares. Contractors report up to 12 hours of extra labor per job when elbows do not align with gutter outlets and downspout pipes.

Low-volume LCL (less-than-container) shipments of bulky elbows drive freight costs 40–60% higher per unit than consolidated FCL sea freight. Small importers pay the highest effective price per elbow.

Non-integrated suppliers who outsource forming, galvanizing, and packing to separate vendors routinely miss shipping dates by 2–3 weeks, causing project suspension penalties of $500–$2,000 per day on commercial roofing contracts.

• 🏗️ Direct Manufacturer Pricing
  Eliminate the 25–45% intermediary markup. Our quoted FOB prices include mill costs, fabrication, and export documentation — no hidden layers.

• 🔩 Full Traceability & Mill Certificates
  Every batch of 90 degree downspout elbows ships with material certificates documenting steel grade, zinc coating thickness, and dimensional inspection reports per EN 10204 3.1.

• 🎯 Precision Tolerances ±0.5 mm
  CNC-controlled forming ensures consistent socket depth, bend angle, and radius across every production run — verified with digital calipers and angle gauges at 3 QC checkpoints.

• 🧪 Corrosion-Defying Coating Options
  Hot-dip galvanized (Z275 to Z600), PVDF, and polyester powder coatings available. Accelerated salt-spray testing (ASTM B117) ensures 800–1,200 hours of corrosion resistance.

• 📐 OEM/ODM Design Capability
  Custom sizes (e.g., 2"×3", 3"×4", 4"×5"), custom angles (45°, 60°, 135°), and custom colors (RAL, pantone) available. We produce to your drawing or sample within 7 days.

• ⚡ High-Speed Delivery
  15–30 days production lead time for standard sizes; consolidate multiple SKUs into 25-day FCL shipments to cut your per-unit freight cost by up to 60%.

▶ Our automated forming lines produce 10,000+ elbows per day

▶ Dedicated QC inspection & packing bay

Galvanized Steel (DX51D+Z275)

Best value-per-dollar for most residential and commercial gutters. Zinc coating of 275 g/m² delivers 15–25 years of service life in moderate climates. Salt-spray tested to 800 hours per ASTM B117.

Recommended: Most projects

Stainless Steel (304/316L)

Superior corrosion resistance for coastal regions, chemical plants, and architecturally exposed applications. 316L adds molybdenum for chloride resistance. Achieves 2,000+ hours salt-spray endurance.

Recommended: Coastal & high-end projects

Aluminum 3003

Lightweight (60% lighter than steel) with excellent atmospheric corrosion resistance. Ideal for retrofit projects where structure loading matters. Naturally forms a protective oxide layer.

Recommended: Lightweight / retrofit systems

UPVC / PVC

Cost-effective, non-corroding, and easy to cut on site. UV-stabilized formulation resists sunlight degradation for 20+ years. Smooth bore reduces debris accumulation by an estimated 30%.

Recommended: Budget & chemical industries

ISO 9001:2015

CE (EN 1462)

UL Listed Component

ANSI / ASTM 201

FCL Container Consolidation

Combine multiple gutter elbow SKUs into a 20' or 40' container. Our warehouse team coordinates mixed loading to maximize cube utilization — reducing your per-unit freight cost by up to 60%.

Secure Packaging for Trans-Oceanic Transit

Elbows are palletized with corner protection, stretch-wrap, and moisture-barrier bags. Damage rate below 0.2% across 2024–2025 shipments.

15–30 Day Production Lead Time

Standard 90 degree downspout elbows ship within 15 days of confirmed order. Custom OEM tools/dies add only 5–7 days for prototyping.

Accenture

Shenhua Group

Bosch

General Electric

We manufacture elbows in hot-dip galvanized steel (DX51D+Z275 to Z600), stainless steel (304/316L), aluminum (3003), UPVC, and copper. Your selection should be based on the local climate, building height, and architectural requirements. For coastal areas, we recommend stainless steel or Z600 galvanized; for budget-conscious residential projects, Z275 galvanized offers the best 25-year value.

For standard size 90 degree gutter elbows, our MOQ is 500 pcs per SKU. For OEM/ODM custom orders (custom dimensions, angles, or colors), the MOQ is 2,000 pcs per design. We also offer sample orders (5–10 pieces) at sample cost with full refund upon your first bulk order.

Zinc coating weight is directly proportional to service life. Per ASTM A653, a Z275 coating (275 g/m² total, both sides) provides approximately 15–25 years of protection in a typical suburban atmosphere. Our Z450 and Z600 coatings extend this to 30–40 years. We verify coating thickness with a magnetic gauge on each production batch and include the data in the mill certificate.

Absolutely. Our CNC profile-forming machines can produce custom angles from 30° to 160° and custom rectangular/round transitions (e.g., 3"×4" to 4" round) within 7–10 days of tooling setup. Just send us a technical drawing (AutoCAD or PDF) and we will confirm feasibility and cost.

Standard 90 degree downspout elbows: 15 days after deposit. Custom OEM orders (new tooling + production): 20–30 days. We use in-house CNC tooling so we do not wait on third-party mold makers — a major advantage of our vertically integrated factory model.

We prefer FOB Tianjin, CIF, or DDP terms. Our logistics team handles export packing, container loading photos, and all export documentation. For EU imports, we can provide CE declarations and REACH documentation. For US imports, we provide ASTM material certificates to expedite customs clearance.

Yes. We offer pre-production samples delivered via DHL/UPS within 5–7 days. We also welcome third-party pre-shipment inspections (SGS/BV) at your cost, and we provide a 12-month workmanship warranty against material defects.

Standard terms: 30% T/T deposit, 70% T/T balance before shipment. For long-term clients and orders above $50,000, we accept L/C at sight. For samples, we accept PayPal or Western Union.

John Miller

General Contractor, Chicago, USA

"We used to buy from a national distributor and thought we were getting a fair price. Switching to Weihuan direct cut our elbow costs by 38% on a 300-unit residential project. The zinc coating is visibly thicker — no complaints from inspectors. Their QC report matched every box we opened."

Sarah Thompson

Roofing Supply Distributor, Leeds, UK

"We switched our entire gutter range to Weihuan's stainless steel 90 degree gutter elbows 18 months ago. Zero customer returns due to corrosion or dimensional issues. Compare that to the 4–6% return rate we had with the previous supplier. Our purchasing team processes restocking with confidence."

Markus Weber

Project Manager, Industrial Builder, Germany

"The 316L elbows we ordered for a chemical plant's roof drainage have performed flawlessly. The mill certificates and EN 10204 3.1 documentation were accepted without any back-and-forth. Our client's engineer specifically praised the uniform wall thickness."

Ahmed Al-Rashid

Procurement Manager, Building Materials, Dubai, UAE

"Shipping from China to Jebel Ali with Weihuan has been smoother than with any of our previous suppliers. Their packing is top-tier — every pallet shrink-wrapped with corner guards. We did a spot check on 4% of the boxes and 100% passed our dimensional inspection."

Hannah van den Berg

E-commerce Seller, Amsterdam, Netherlands

"I sell gutter supplies on Bol.com and Amazon. Weihuan's OEM service lets me sell custom-length downspout adapters that no competitor carries. My sales are up 42% since I launched their private-label elbows last year. Delivery reliability is excellent — always within 5 days of the agreed date."

Pierre Dubois

Building Materials Importer, Lyon, France

"What impressed us most was the pre-shipment sample. They welded a custom copper 90 degree downspout elbow from our sketch and DHL'd it to France in 6 days. The fit with the Italian gutter profile was exactly as specified. That level of responsiveness is rare in this industry."

With 15+ years of experience in the pipe fittings and drainage components industry, James has overseen the export of more than 12,000 tons of fittings and pipeline products to 20+ countries. He holds a BSc in Materials Science from Hebei University of Technology and is a member of the Chinese Society for Metals (CSM). His engineering insight helps buyers avoid the common pitfalls of sourcing substandard gutter and downspout fittings in cross-border trade.