Tri-Clamp Stainless Steel Weldless Bulkhead Fitting for Rainwater Harvesting
Why Choose Our Stainless Steel Weldless Bulkhead Fittings?
Traditional tank fittings require professional on-site welding, which damages coatings and increases corrosion risks. Our innovative hex-nut compression bulkhead bypasses welding entirely. Precision-machined from SS304 or SS316L, it provides a rugged, vibration-resistant, and high-pressure interface tailored for commercial underground storm holding tanks, rainwater storage cisterns, and multi-stage filtration units.
Engineered for Severe Weather & Stormwater Assets
Rainwater harvesting and management systems demand materials that can withstand constant moisture, fluctuating pH levels from initial runoffs, and outdoor soil pressures. This bulkhead connector uses premium-grade raw stainless steel materials sourced from certified mills. The thick wall construction resists mechanical stress caused by ground shifting or pipe expansion. By integrating our weldless solution, civil engineering projects and eco-drainage builders across Europe and the US ensure compliance with strict environmental building standards.
The key highlight is the seamless integration of a Tri-Clamp (Clover flange) connector alongside a heavy-duty male/female thread profile. The internal layout facilitates optimal hydrodynamic flow, preventing sediment accumulation from untreated rainwater which could lead to blockages or system downtime in continuous smart filtration skids.
Zero Leakage Dual-Gasket Compression Mechanics
Our weldless design utilizes an oversized silicone or EPDM sealing washer arrangement. When the outer heavy hex backing nut is torqued, the gasket compresses symmetrically against the uneven surfaces of rotationally molded polyethylene tanks or corrugated metal cisterns. This mechanical pressure lock eliminates any path for fluid bypass, securing an air-tight, water-tight hold even under substantial hydrostatic head pressures found in multi-ton commercial water reclamation facilities.
Technical Specifications Table
| Model Code | Bulkhead Thread Size | Tri-Clamp Size (Flange OD) | Recommended Tank Hole | Max Operating Pressure | Material Configuration |
|---|---|---|---|---|---|
| RWB-SS050 | 1/2″ NPT / BSPT | 0.5″ – 0.75″ (25.4mm) | 32 mm | 300 PSI | SS304 / SS316L |
| RWB-SS100 | 1″ NPT / BSPT | 1.5″ (50.5mm) | 42 mm | 250 PSI | SS304 / SS316L |
| RWB-SS150 | 1.5″ NPT / BSPT | 2″ (64.0mm) | 54 mm | 200 PSI | SS304 / SS316L |
| RWB-SS200 | 2″ NPT / BSPT | 2.5″ (77.5mm) | 68 mm | 150 PSI | SS304 / SS316L |
Logistics, Customization, & Global OEM Distribution
As a dedicated B2B building and piping hardware manufacturer, we support plumbing distributors, rainwater equipment OEMs, and environmental project engineers globally. Each stainless steel component undergoes automated ultrasonic cleaning and precise thread gauging before packaging. We offer custom custom laser marking for serial codes, custom-tailored flange dimensions matching specific DIN/ISO regulations, and bulk palletized shipping to European ports and North American distribution hubs.
Our standard production lead times are highly competitive, with express air cargo options for urgent municipal utility replacements or urgent eco-friendly commercial developments. Each shipment is fully accompanied by Material Test Reports (MTR) according to EN 10204 3.1 to verify chemical and physical properties.
Frequently Asked Questions (FAQ)
Q1: Can this weldless bulkhead be installed on plastic or curved rainwater tanks?
A1: Yes, the heavy-duty hex locking mechanism combined with thick, highly pliable silicone or EPDM gaskets enables secure placement on flat and slightly curved surfaces of molded polyethylene (HDPE) or steel corrugated tanks without slipping.
Q2: Why is stainless steel preferred over brass or PVC for commercial rainwater filtration?
A2: Urban runoff water often contains corrosive salts, atmospheric acids, and organic chemical debris. Grade 304/316L stainless steel provides unmatched life cycles, prevents heavy metal contamination, and withstands underground soil pressure far better than PVC or common brass fittings.
Q3: Do you provide NPT and BSPT threads for European and US markets respectively?
A3:
Q4: What is the minimum order quantity (MOQ) for custom sizes or private branding?
A4: For standard dimensions, our MOQ starts at 100 units. For specialized custom flange dimensions, alternative specialized gaskets (like Viton), or laser-etched brand logos, our baseline MOQ is typically 500 units per batch.
Get Custom Stainless Steel Weldless Bulkhead Technical Layouts & Factory Estimates
Contact our B2B export engineering department today to receive an itemized wholesale pricing catalog, detailed engineering blueprints, and a complete physical sample box delivered directly to your corporate headquarters!
