Table of Contents
Double Press Fittings
Nonleak manufactures stainless steel double press fittings for press-connected piping systems, including couplings, elbows, tees, caps, threaded transitions and other fitting configurations. Material grade, size range, sealing element, press profile and application suitability should be confirmed for the exact product and project specification.
- 304 / 316L Stainless Steel Options
- Elbows · Tees · Couplings · Caps · Transitions
- Press-to-Press & Press-to-Thread Configurations
- Technical Documentation & Project Support
Double Press Fittings Manufacturing and Quality Control
Factory Introduction:
Nonleak manufactures stainless steel double press fittings for building water supply, HVAC and other defined piping applications. Production and inspection controls cover material identification, dimensional consistency, surface condition, fitting geometry and connection-related quality requirements according to the applicable product and project specification.
Manufacturing is supported by Nonleak’s 50,000 m² production facility and ISO 9001 quality-management system. Exact certification scope, product standards and project-specific approval requirements should be confirmed against the current supporting documents.
Standards & Conformity Documentation:
| Certification | Scope |
|---|---|
| ISO 9001:2015 | Quality Management System |
| GB/T 19228.1-2011 | National Standard Compliance |
| EU Conformity Documentation | CE / CPR conformity documentation is available for defined Double Press fitting products and intended-use scopes. Request current CE / CPR documentation |
Why Choose the Double Press System?
Health & Environmental Excellence
304 and 316L stainless steel are widely used in piping applications where corrosion resistance, clean internal surfaces and long-term material stability are important. Final material selection should follow the water quality, service environment and project requirements. It is also 100% recyclable, making it the most responsible choice for both human health and the planet.
Built-In Safety & Durability
The flexible design of the double press connection provides exceptional resistance to external impact, water hammer, ground settlement, and seismic activity. Combined with the inherent corrosion resistance of 304/316L stainless steel, it can support long-term piping performance when the pipe, fitting, seal, tooling and installation procedure are correctly selected and verified.
Unmatched Installation Efficiency
Installation is incredibly fast and simple. A single press operation completes a secure joint in seconds, Press-fit installation can reduce field joining steps and installation time compared with welding in suitable projects, depending on pipe size, access, tooling and site conditions.This hydraulic tooling process is clean, requires no electricity at the joint, and is easy for technicians to master.
Superior Thermal Insulation
Stainless steel's low thermal conductivity (24x lower than copper) means hot water stays hot longer during transport. This results in significant energy savings and improved efficiency in hot water systems.
Double Press Fitting Range for Project RFQs
Before selecting a stainless steel double press fitting, confirm the complete connection system rather than the fitting body alone. Product availability and dimensions vary by fitting type, so the exact model should be checked against the current product table or technical datasheet.
| Selection Item | What to Confirm |
|---|---|
| Product Types | Couplings, elbows, tees, caps, crossover fittings, threaded adapters, threaded elbows, threaded tees and unions |
| Material | 304 / 316L stainless steel options according to the product and project requirement |
| Connection | Press-to-press or press-to-thread configuration according to fitting type |
| Size Range | Varies by product type; confirm the current model table or technical datasheet |
| Sealing Element | Confirm the required seal material and approved service conditions for the application |
| Tooling | Confirm the compatible press profile, jaw or ring and press tool for the selected fitting system |
| Documentation | Product datasheets, dimensional information, inspection and project documentation as required |
| RFQ Information | Product type, size, material, quantity, medium, project location and applicable specification |
Products List
Why Engineers, Contractors Choose Nonleak
| Advantage | Technical Detail | Business Impact |
|---|---|---|
| Health & Environmental Safety | 304/316L stainless steel – material approved for implantable medical devices; 100% recyclable | Meets strict health codes; supports green building certifications (LEED) |
| Unmatched Durability | Double press design absorbs water hammer, vibration, and seismic stress | Reduced warranty claims; lower long-term liability |
| Installation Efficiency | Single press operation – 15 seconds per joint; no hot work permits required | 80% labor reduction; faster project completion; improved site safety |
| Thermal Efficiency | Stainless steel conductivity 24x lower than copper | Energy savings in hot water recirculation systems |
| Lifecycle Planning | Corrosion-resistant stainless steel construction and mechanically pressed joints | Service life and maintenance planning should follow the actual medium, environment, installation quality and project requirements. |
The Right Seal for Every Application
The heart of the system is its O-ring. We don’t believe in a one-size-fits-all approach.
| Application Scenarios | Recommended Sealing Ring Materials | Core Characteristics |
| Water Supply and Drainage Systems (Cold Water/Hot Water/Drinking Water/Medical) | Ethylene Propylene Diene Monomer (EPDM) Silicone Rubber | Healthy and odorless, meets hygiene standards, resistant to high and low temperatures, anti-aging. |
| Gas Systems (Natural Gas/Coal Gas/Compressed Gas) | Fluororubber (FKM) Nitrile Rubber (NBR) | Excellent resistance to oil, fuel oil, and solvents, ensuring safe gas sealing. |
Double Press Fittings in Real Projects
Nonleak stainless steel Double Press systems have been supplied for documented building projects in China across different project types and supply years. The cases below show confirmed pipe and Double Press fitting quantities from actual project supply records.
These project references demonstrate manufacturing and supply experience. Product suitability, service conditions, regulatory approval and project-specific requirements must still be evaluated independently for every new installation.
Chengdu Qingbaijiang District TCM Hospital — Sichuan, China
2021 · Healthcare Project
Nonleak supplied 459,870 meters of 304 stainless steel pipe and 367,891 Double Press fittings for this large healthcare project in Chengdu.
View the Chengdu Hospital Double Press project →
Baoji Central Hospital Port Area Branch — Shaanxi, China
2022 · Healthcare Project
Nonleak supplied 132,980 meters of 304 stainless steel pipe and 100,095 Double Press fittings for this hospital project in Baoji.
View the Baoji Hospital Double Press project →
Hongbao Jinxiu Riverside — Ningxia, China
2018 · Residential Project
Nonleak supplied 75,103 meters of 304 stainless steel pipe and 41,620 Double Press fittings for this residential development.
Request a Quote or Technical Consultation
- ✓ Your inquiry will be responded to within 8 hours
- ✓ Technical datasheets available upon request
- ✓ Custom manufacturing supported for large-scale projects
Simplicity Itself: Install in 4 Steps
Double Press Pipeline Connection – Installation Procedure
Step 1: Measure and Cut the Pipe
Measure and mark the required pipe length
Cut using either an electric toothed saw or a manual pipe cutter
Ensure a clean, square cut
Step 2: Inspect the O-ring
Check that the sealing ring is properly positioned
Verify it sits correctly in the groove without twists or gaps
Step 3: Insert the Pipe
Insert the pipe into the fitting socket until it reaches the marked line
Maintain insertion depth tolerance within 3mm
Take care not to damage the internal O-ring during insertion
Step 4: Perform the Press Operation
Use professional pressing tools calibrated for double press fittings
Position the tool correctly over the pressing zones
Execute the press operation until complete