Coupler
Stainless 304 Fittings
| Product Code | Product description | Size | Bag | Box |
|---|---|---|---|---|
| 7815000015 | 15MM COUPLER SS 304 PRESS | 15MM | 25 | 200 |
| 7815000022 | 22MM COUPLER SS 304 PRESS | 22MM | 25 | 150 |
| 7815000028 | 28MM COUPLER SS 304 PRESS | 28MM | 20 | 80 |
| 7815000035 | 35MM COUPLER SS 304 PRESS | 35MM | 10 | 40 |
| 7815000042 | 42MM COUPLER SS 304 PRESS | 42MM | 5 | 30 |
| 7815000054 | 54MM COUPLER SS 304 PRESS | 54MM | 2 | 20 |
| 7815000067 | 66.7MM COUPLER SS 304 PRESS | 66.7MM | 6 | 6 |
| 7815000076 | 76.1MM COUPLER SS 304 PRESS | 76.1MM | 5 | 5 |
| 7815000108 | 108MM COUPLER SS 304 PRESS | 108MM | 3 | 3 |
Stainless Steel Press Coupler
The Lawton Tubes 304 Stainless Steel Press Coupler is designed to provide a secure and reliable connection between two lengths of stainless steel press-fit pipework. Manufactured from high-quality 304 stainless steel, this fitting offers excellent strength, durability and corrosion resistance, making it suitable for a wide range of commercial, industrial and mechanical applications.
The advanced press-fit design enables a fast, flame-free installation without the need for welding, soldering or threading. This helps reduce installation time, minimise labour requirements and provides a consistent, leak-tight connection for dependable long-term performance.
Designed for use with compatible press tools, the fitting delivers a secure joint and is backed by a 50-year warranty for added confidence.
## Key Features
* Manufactured from high-quality 304 stainless steel
* Connects two lengths of stainless steel pipework
* Excellent corrosion resistance and durability
* Fast and efficient press-fit installation
* No welding, soldering or hot works required
* Secure, leak-tight connection
* Suitable for commercial, industrial and mechanical applications
* Compatible with press-fit stainless steel pipe systems
* Backed by a 50-year warranty
Technical Data
Product Overview
Lawton 304 Stainless Steel Press Fittings provide a fast, reliable and heat-free jointing solution for heating, cooling and chilled water systems. Manufactured from AISI 304 stainless steel, the range is available from 15mm to 168.3mm and features an M-profile press connection, delivering secure installations without the need for soldering or hot works.
Applications
- Heating systems
- Cooling systems
- Chilled water systems
- Compressed air systems
- Vacuum systems
Market Sectors
- Domestic
- Commercial
- Industrial
Product Specifications
|
Property |
Specification |
|
Material |
1.4301 (AISI 304) Stainless Steel |
|
Size Range |
15mm – 168.3mm |
|
Press Profile |
M-Profile |
|
Seal Material |
Black EPDM O-Ring |
|
Maximum Operating Pressure |
16 bar |
|
Minimum Operating Pressure |
-0.8 bar (gauge) |
|
Operating Temperature Range |
-20°C to +110°C |
|
Product Marking |
Size, LTC Logo, Material Grade, Manufacturing Date |
|
Electrical Continuity |
Yes |
|
Warranty |
50 Years* |
*Subject to standard Terms & Conditions. Please refer to our website for full details.
Standards & Compliance
|
Category |
Standard |
|
Fitting Material |
EN 10088 |
|
O-Ring Material |
EN 681-1 |
|
Water Regulations Approval |
WRAS Approved Material |
|
Male Thread Connections |
ISO 7 / EN 10226-1 |
|
Female Thread Connections |
BS EN ISO 228 |
Operating Performance
|
Property |
Value |
|
Maximum Working Pressure |
16 bar |
|
Minimum Pressure |
-0.8 bar (vacuum) |
|
Operating Temperature |
-20°C to +110°C |
| Electrical Continuity | Yes |
Tube Compatibility
Lawton 304 Press Fittings are compatible with stainless steel tubes manufactured to:
- EN 10312
- EN 10217-7
The fittings are suitable for both:
- Series 1 tube dimensions
- Series 2 tube dimensions
Compatible Tube Sizes
|
Tube OD (mm) |
EN 10312 Series 1 Wall Thickness (mm) |
EN 10312 Series 2 Wall Thickness (mm) |
|
15 |
0.6 ✓ |
1.0 ✓ |
|
18 |
0.7 ✓ |
1.0 ✓ |
|
22 |
0.7 ✓ |
1.2 ✓ |
|
28 |
0.8 ✓ |
1.2 ✓ |
|
35 |
1.0 ✓ |
1.5 ✓ |
|
42 |
1.1 ✓ |
1.5 ✓ |
|
54 |
1.2 ✓ |
1.5 ✓ |
|
66.7 |
1.2 ✓ |
— |
|
76.1 |
1.5 ✓ |
2.0 ✓ |
|
88.9 |
— |
2.0 ✓ |
|
108 |
1.5 ✓ |
2.0 ✓ |
|
139.7 |
2.0 ✓ |
2.6 ✓ |
|
168.3 |
2.0 ✓ |
2.6 ✓ |
Recommended Minimum Fitting Clearance
To allow for tube deformation during pressing, the following minimum distances should be maintained between adjacent fittings:
|
Tube Size |
Minimum Clearance (mm) |
|
15mm |
13 |
|
18mm |
13 |
|
22mm |
13 |
|
28mm |
13 |
|
35mm |
13 |
|
42mm |
16 |
|
54mm |
20 |
|
66.7mm |
30 |
|
76.1mm |
40 |
|
88.9mm |
45 |
|
108mm |
50 |
|
139.7mm |
60 |
|
168.3mm |
70 |
Installation Requirements
Approved Pressing Systems
Lawton 304 Press Fittings are compatible with approved M-profile press tools from:
- Novopress
- Geberit
- Rothenberger
- REMS
Important: Matching tooling, adaptors, pressing jaws and slings from the same manufacturer must always be used during installation.
Jointing Method
|
Property |
Specification |
|
Connection Type |
Press Fit |
|
Press Profile |
M-Profile |
|
Heat Required |
No |
|
Hot Works Permit Required |
No |
Material Compatibility
Dissimilar Metals
Installations containing mixed metals should be avoided wherever possible, as galvanic corrosion may occur when metals with significantly different electrochemical properties are connected directly together.
Where mixed-metal systems are unavoidable:
- Follow BS EN 14336 guidance
- Apply recognised good engineering practice
- Ensure suitable system design and isolation measures are used
Grade Compatibility
- 304 and 316L stainless steel fittings and tube may be installed within the same system.
- Overall corrosion resistance will be determined by the least corrosion-resistant component used.
Water Treatment Guidance
304 stainless steel is suitable for closed-loop systems using treated water.
Recommendations include:
- Use water treatment chemicals approved for stainless steel systems.
- Maximum chloride concentration should not exceed 250 mg/l.
- Chlorine-based biocide dosing should be carefully controlled to prevent localised corrosion.
Application Limitations
- Suitable for contact with water.
- Not recommended for potable water systems where elevated chloride content may be present due to the risk of chloride-induced corrosion.
