316 STRAIGHT UNION
Stainless Steel 316L Press
| Part | Description | Size | Bag | Box |
|---|---|---|---|---|
| 7727000015 | 15MM STRAIGHT UNION SS 316L PRESS | 15MM | 10 | 100 |
| 7727000022 | 22MM STRAIGHT UNION SS 316L PRESS | 18MM | 10 | 50 |
| 7727000028 | 28MM STRAIGHT UNION SS 316L PRESS | 22MM | 5 | 25 |
| 7727000035 | 35MM STRAIGHT UNION SS 316L PRESS | 35MM | 4 | 20 |
| 7727000042 | 42MM STRAIGHT UNION SS 316L PRESS | 42MM | 2 | 18 |
| 7727000054 | 54MM STRAIGHT UNION SS 316L PRESS | 54MM | 2 | 8 |
"Stainless Steel Press Straight Union
The Lawton Tubes 316 Stainless Steel Press Straight Union provides a secure connection between two sections of stainless steel press-fit pipework while allowing easier maintenance and servicing where required.
Manufactured from premium 316 stainless steel, it offers excellent corrosion resistance and dependable long-term performance. The press-fit design enables fast installation, helping installers save time and reduce labour costs compared with traditional joining techniques.
Backed by a 50-year warranty, the Lawton Tubes Stainless Steel Press Straight Union delivers a reliable and efficient solution for professional pipework installations.
Key Features
Manufactured from premium 316 stainless steel
Straight connection between pipe sections
Fast and efficient press-fit installation
Reduces installation time and labour costs
No welding, soldering or hot works required
Excellent corrosion resistance
Durable and reliable construction
Suitable for commercial and industrial systems
Backed by a 50-year warranty"
Technical Data
Product Overview
Lawton Copper Press Fittings provide a fast, reliable and heat-free jointing solution for potable water, heating, cooling and oil-free compressed air systems. Available in sizes from 15mm to 108mm, the range features an M-profile press connection with EPDM sealing technology and is compliant with EN 1254-7.
Applications
- Potable Water Systems
- Heating Systems
- Cooling Systems
- Oil-Free Compressed Air Systems
Market Sectors
- Domestic
- Commercial
Product Specifications
Property | Specification |
Size Range | 15mm - 108mm |
Approvals | KIWA REG4, WRAS |
Materials | CW024A Copper and CW602N DZR Brass |
Seal Material | EPDM O-Ring |
Press Configuration | M-Profile |
Maximum Liquid Pressure | 16 bar (-20°C to +110°C) |
Maximum Negative Pressure | >0.2 bar (-20°C to +110°C) |
Maximum Oil-Free Compressed Air Pressure | 10 bar (5°C to 35°C) |
Product Marking | Size, LTC Logo, EN 1254 |
Electrical Continuity | Yes |
Thread Specification (Male) | ISO 7 / EN 10226-1 |
Thread Specification (Female) | BS EN ISO 228 |
Standard | EN 1254-7 |
Warranty | 75 Years* |
Subject to standard Terms & Conditions. Please refer to our website for full details.
Standards & Compliance
Category | Standard |
Press Fittings | EN 1254-7 |
Male Threads | ISO 7 / EN 10226-1 |
Female Threads | BS EN ISO 228 |
Product Approval | KIWA REG4 |
Product Approval | WRAS |
Operating Performance
Property | Value |
Maximum Liquid Pressure | 16 bar |
Maximum Oil-Free Compressed Air Pressure | 10 bar |
Maximum Negative Pressure | >0.2 bar |
Operating Temperature Range | -20°C to +110°C |
Electrical Continuity | Yes |
Copper Tube Compatibility
Compatible with copper tube manufactured to BS EN 1057.
Material Conditions
- R250 – Half-hard, bendable
- R290 – Hard, unbendable
Outside Diameter | 0.7mm Wall | 0.9mm Wall | 1.0mm Wall | 1.2mm Wall | 1.5mm Wall | 2.0mm Wall | 2.5mm Wall |
15mm | R250 | — | R250 / R290 | — | — | — | — |
22mm | — | R250 | — | R250 / R290 | — | — | — |
28mm | — | R250 | — | R250 / R290 | — | — | — |
35mm | — | — | R290 | R250 / R290 | R290 | — | — |
42mm | — | — | R290 | R250 / R290 | R290 | — | — |
54mm | — | — | — | — | R290 | R290 | R290 |
66.7mm | — | — | — | — | R290 | R290 | — |
76.1mm | — | — | — | — | R290 | R290 | — |
108mm | — | — | — | — | R290 | — | R290 |
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 F (mm) |
15mm | 13 |
22mm | 13 |
28mm | 13 |
35mm | 13 |
42mm | 16 |
54mm | 20 |
66.7mm | 30 |
76.1mm | 40 |
108mm | 50 |
Approved Press Tools
Lawton Copper Press Fittings are approved for use with M-profile press systems from:
- Novopress
- Geberit
- Rothenberger
- REMS
Important Installation Note
Matching press tools, adaptors, jaws and slings from the same manufacturer must always be used during installation.
Tool Compatibility
Manufacturer | Model | Diameter Range |
Novopress | ACO103 | 15mm - 28mm |
Novopress | ACO203 | 15mm - 54mm |
Novopress | ACO203XL | 15mm - 76.1mm |
Novopress | ACO403 | 108mm |
Geberit | ACO103plus | 15mm - 35mm |
Geberit | ACO203plus | 15mm - 66.7mm |
Geberit | ACO203XLplus | 15mm - 108mm |
Rothenberger | Compact TT | 15mm - 28mm |
Rothenberger | Compact 3 | 15mm - 35mm |
Rothenberger | Romax 4000 | 15mm - 54mm |
REMS | Mini-Press | 15mm - 28mm |
REMS | Akku-Press | 15mm - 28mm |
Note: For 108mm fittings, Novopress ZB221 and ZB222 adaptors act as the first and second stages respectively during the two-stage pressing process for the M108 collar.
Material Compatibility
Dissimilar Metals
Installations containing mixed metals should generally be avoided, as galvanic corrosion may occur when dissimilar metals are connected directly together.
Where mixed-metal systems are unavoidable:
- Follow the Water Regulations Guide.
- Apply recognised engineering best practice.
- Consider suitable isolation measures where required.
