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Premium 316L Stainless Steel (EN 1.4404)
Available in 133 mm - 325 mm, Roll Groove delivers a robust option for:
· Potable water distribution
· Heating and cooling water
· Chilled water / condenser systems
· Industrial and process water
· Large-scale plant rooms and infrastructure
Roll-grooved stainless provides predictable tolerances, clean alignment, and compatibility with standard mechanical couplings, supporting reliable performance across high-demand installations.
For guidance on system selection, coupling compatibility or project-specific requirements, contact USCO for technical support.
Sub-heading

Premium 316L Stainless Steel (EN 1.4404)
Available in 133 mm - 325 mm, Roll Groove delivers a robust option for:
· Potable water distribution
· Heating and cooling water
· Chilled water / condenser systems
· Industrial and process water
· Large-scale plant rooms and infrastructure
Roll-grooved stainless provides predictable tolerances, clean alignment, and compatibility with standard mechanical couplings, supporting reliable performance across high-demand installations.
For guidance on system selection, coupling compatibility or project-specific requirements, contact USCO for technical support.
V-Press Profile + EPDM O-Ring
Consistent, reliable sealing, press after press.
Mayer fittings use a V-press profile with premium EPDM O-rings for proven performance across a wide range of applications. Tight tolerances and consistent groove geometry provide clean, repeatable seals every time.


Leak Path
A jointing system designed for installers.
Leak Path: Any unpressed joint leaks at test stage, making misses easy to spot.
Press to finish: Once pressed, connections are permanently sealed.
Crimp indicator: A cellophane press indicator provides quick visual confirmation in real install conditions.
It’s faster, safer, and cuts out the costly rework associated with welded or threaded systems.
Clear Markings & Full Traceability
All pipe and fittings are clearly marked with:
• Material grade (316L)
• Pressure & temperature ratings
• Dimensions
• Certification marks
• Batch traceability
Confidence for installers.

Specifications
Mayer Stainless Press 316L EPDM
Complete System Range (15–108 mm)
Larger Diameters
Approved Press-Fit Tools
Operating Temp
Pressure Rating
Aquatherm Pipe Dimensions
Pipe Dimensions
Aquatherm Green S
Aquatherm Green MF
Aquatherm Green MFRP
16mm
●
-
-
20mm
●
●
-
25mm
●
●
-
32mm
●
●
●
40mm
●
●
●
50mm
●
●
●
63mm
●
●
●
75mm
●
●
●
90mm
●
●
●
110mm
●
●
●
125mm
●
●
●
160mm
●
●
●
200mm
●
●
●
250mm
●
●
●
315mm
●
●
●
355mm
●
●
●
400mm
-
●
-
450mm
-
●
-
500mm
-
-
-
630mm
-
-
-
Tube Specification
These specifications are valid for both 316L and 304 stainless steel.
Nominal Size
Inside Diameter
Outside Diameter
Wall Thickness
Dry Weight kg/m
Wet Weight kg/m
Volume l/m
Tube Length
DN15
15
15
1.0
0.351
0.484
0.133
5.8
DN20
22
22
1.2
0.625
0.928
0.302
5.8
DN25
28
28
1.2
0.805
1.321
0.515
5.8
DN32
35
35
1.5
1.258
2.062
0.804
5.8
DN40
42
42
1.2
1.521
2.718
1.195
5.8
DN50
54
54
1.5
1.972
4.015
2.043
5.8
DN65
76.1
76.1
2.0
3.711
7.794
4.083
5.8
DN80
88.9
88.9
2.0
4.352
10.58
6.232
5.8
DN100
108
108
2.0
5.308
13.810
8.495
5.8
Warranty
The Mayer stainless press-fit system is engineered for a 50-year service life and is guaranteed against leakage for 25 years when installed to specification.
Liability
Mayer provides a 10-year liability warranty covering material damage to third parties, including investigation, removal, replacement, exposure, or disassembly of defective components.
For full details, refer to the Mayer Warranty Statement in the downloads section.
Fields of Application
Certifications
Product
Name
Certificate Number
Standard
Date Issued
Aquatherm Green
Watermark
WMKA02437
ISO 15874-2:2013 & ISO 15874-3:2013
18/06/2024

Aquatherm Green
Branz
Appraisal No: 539
NZBC - B2, F2, G10, G12.
08/05/2023

Aquatherm Blue / Green pipe S / MF / MF-RP Piping System
EPD
Statement of Verification: BREG EN EPD No: 000475.
EN15804:2012+A2:2019 and BRE Global Scheme Document SD207.
10/02/2023


Aquatherm Red MG / MF-RP piping system.
EPD
Statement of Verification: BREG EN EPD No: 000476.
EN15804:2012+A2:2019 and BRE Global Scheme Document SD207.
10/02/2023


Aquatherm Black piping system
EPD
Statement of Verification: BREG EN EPD No: 000477.
EN15804:2012+A2:2019 and BRE Global Scheme Document SD207.
10/02/2023


Aquatherm Blue / Green pipe S / MF / MF-RP Piping System
EPD
Statement of Verification: BREG EN EPD No: 000478.
EN15804:2012+A2:2019 and BRE Global Scheme Document SD207.
10/02/2023


Aquatherm Green
BODYCOTE Certificate for chlorine resistance potable water applications
BODYCOTE P-07/06 (Bodycote code 3397)
ASTM F 2023
05/06/2008
Aquatherm Red PPR Pipe and Pipe Fittings
AON
Certificate Number: AQ-1 (revision 4)
Section 114 of NZS 4541 :2007
Effective from July 2013

Aquatherm Green Pipe & Fittings
NSF
-
NSF/ANSI/CAN 61 Drinking Water System Components - Health Effects
-

Aquatherm Green Pipe & Fittings
NSF
-
NSF/ANSI 51 Food Equipment Materials
-

Aquatherm Green Pipe & Fittings
NSF
-
NSF/ANSI 14 Plastics Piping System Components and Related Materials
-

Mayer Stainless Press Fit Piping System.
Branz
Appraisal No: 1033
NZBC - B2, F2, G10, G12.
17/11/2023

Mayer Stainless 316L Pipe and Press Fit Fittings
Watermark
Licence No: VM-022882
AS 3688:2016 and AS 5200.053-2008
02/07/2013

Mayer Stainless 316L Press Fit Fittings.
AGA Certified Product
Certificate No: 9096
AS 3688-2016
15/06/2023

Mayer Stainless Press Fittings for use with 316L & 304 Pipe (EPDM)
NSF
Certificate No: 2306655 S3
NSF REG4 - Water Fittings, Components, and Materials - Verification of compliance with Regulation 4(1)(a)
24/06/2023

Mayer Stainless 316L & 304 stainless steel tube and press fit fittings (EPDM)
WRAS
WRAS Approval Number: 2307003 Certificate No: 1704328
EN 10312 and DVG-W543
April 2022

Mayer Stainless 316L Pipe and Press Fit Fittings
AON
Certificate Number: M116
As per section 1.16 of NZS 4541:2020 and NZS4515:2009 Appendix G.
Effective from June 2021

Water Grip
Radio Regulatory Compliance Mark (RCM)
Sdoc Identification Number: QWGW1
AS/NZS 60950.1:2011
11/09/2025

Water Grip
Declaration of Conformity to European Standards
–
RED 2014/53/EU harmonisation legislation
–
Mayer PEX Fittings - Crimp & Slide
Watermark
Certificate No: WMK26578
AS/NZS 2537.2:2011
11/03/2021

Mayer PEX-a Pipes
Watermark
Certificate No: WMCS2016
AS/NZS 2492:2007
04/02/2021

Certifications
















