Overview
Next-Generation PE & PVC Piping Solutions
The Viking Johnson AquaFast portfolio provides a comprehensive, high-performance piping solution designed to accommodate diverse pipeline diameters through two distinct lines. This advanced product range comprises the AquaFast 63mm to 315mm series and the AquaFast Large Diameter 355mm to 450mm series.
Both product lines share a core engineering philosophy that prioritises effortless installation, robust connection reliability, and long-term asset protection across all operational conditions. By eliminating the need for specialist tools, extensive training, or internal support liners, AquaFast dramatically simplifies the joining of polyethylene and polyvinyl chloride pipes.
Sectors
Water
Waste Water

AquaFast: 63mm to 315mm
The standard AquaFast series is specifically engineered to streamline both new pipeline construction and on-the-spot field repairs.
This range features a unique pressure-sealing system combined with an enhanced gripping mechanism that ensures the fittings slide easily into position during assembly. Installers can easily position the product within narrow trenches or challenging environments because the smart design deliberately delays gripper engagement.

The jointing process requires only a standard spanner to tighten a minimal number of bolts, featuring just two bolts per fitting for sizes up to 125mm.
A built-in metal-to-metal positive stop serves as a visual indicator to confirm correct fitment, removing the need for torque wrenches and entirely preventing over-tightening.
Once fully installed, the system provides absolute end-load restraint that resists pipe pull-out, effectively negating the need for expensive concrete thrust blocks.
Furthermore, these couplings and flange adaptors accommodate both PE80 and PE100 polyethylene pipe materials across various standard dimension ratios without requiring an internal liner.
This versatile design makes the standard range an ideal solution for creating seamless transitional connections between polyethylene and metric polyvinyl chloride pipes.
AquaFast Large Diameter: 355mm to 450mm
The AquaFast Large Diameter series expands these operational capabilities to larger infrastructure projects. This innovative range offers an efficient, all-weather alternative to traditional, time-consuming electrofusion and butt-fusion jointing methods.
The large diameter fittings are carefully engineered with a high structural tolerance that easily accommodates oval pipes, eliminating the need for expensive and slow re-rounding tools in the trench.

Water utilities and distribution networks benefit significantly from this range because just ten product sizes cover a wide selection of multiple standard dimension ratios.
This smart consolidation drastically reduces the required stock holding, lowers inventory costs, and ensures immediate, off-the-shelf product availability for unexpected maintenance events.
For long-term durability, the large diameter fittings feature a premier WRAS-approved black Rilsan Nylon 11 coating that delivers exceptional resistance to impact, abrasion, harsh chemicals, and severe weathering.
The advanced gripping mechanism ensures full end-load restraint and makes the assembly suitable for use in extreme climatic regions ranging from minus twenty degrees up to sixty degrees Celsius.
Manufactured under stringent quality management systems conforming to BSI ISO 9001, the range meets rigorous UK and European Water Regulations alongside international performance standards like BS EN 12842 and ISO 178875.
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The AquaFast Product Range
The AquaFast Product Range Benefits
AquaFast dramatically simplifies the joining of polyethylene and polyvinyl chloride pipes.
Simple to Install
AquaFast’s improved design makes fitting easier on oval or coiled pipes. With fewer bolts and no torque wrench required, installation is faster, simpler and demands less skill than traditional systems.
Positive Stop
A built-in metal-to-metal positive stop removes the need for a torque wrench and prevents over-tightening, ensuring a perfect, consistent installation every time.
Easy Adjustment on Pipe
The resister feature delays gripper engagement, allowing installers to slide and reposition the fitting accurately—even in harsh or wet trench conditions.
Resists Pullout
AquaFast provides full end-load restraint and is engineered to meet WIS 4-24-01 Type 2 and ISO 14236.2, ensuring secure, long-lasting resistance to pipe pullout.
Unique 3-Way Pressure Sealing System
The patented gasket and metal component design features enable triple contact pressure responsive sealing, ensuring high performance sealing even after pipe wall relaxation.
Gasket Sealing
Double O-ring gasket provides localised high-pressure contact points for an efficient pipe surface seal.
Corrosion Protection
Rilsan® Nylon 11 coating provides WRAS-approved, long-term corrosion, impact, and abrasion protection.
Bolts supplied as standard with blue Sheraplex coating or in stainless steel with Delta Seal silver coating to prevent galling.
3D Model Loading…
Simple to Install
AquaFast’s improved design makes fitting easier on oval or coiled pipes. With fewer bolts and no torque wrench required, installation is faster, simpler and demands less skill than traditional systems.
Positive Stop
A built-in metal-to-metal positive stop removes the need for a torque wrench and prevents over-tightening, ensuring a perfect, consistent installation every time.
Easy Adjustment on Pipe
The resister feature delays gripper engagement, allowing installers to slide and reposition the fitting accurately—even in harsh or wet trench conditions.
Resists Pullout
AquaFast provides full end-load restraint and is engineered to meet WIS 4-24-01 Type 2 and ISO 14236.2, ensuring secure, long-lasting resistance to pipe pullout.
Unique 3-Way Pressure Sealing System
The patented gasket and metal component design features enable triple contact pressure responsive sealing, ensuring high performance sealing even after pipe wall relaxation.
Gasket Sealing
Double O-ring gasket provides localised high-pressure contact points for an efficient pipe surface seal.
Corrosion Protection
Rilsan® Nylon 11 coating provides WRAS-approved, long-term corrosion, impact, and abrasion protection.
Bolts supplied as standard with blue Sheraplex coating or in stainless steel with Delta Seal silver coating to prevent galling.
3D Model Loading…
Innovative Gripping
Enhanced Type 2 end-load restraint provides strong, reliable grip and prevents pipe pull-out during operation.
Positive Stop
Visual confirmation of correct installation through clear metal-to-metal contact between clamp bands.
Corrosion Protection
All cast components coated in Black Rilsan Nylon 11 for exceptional resistance to impact, abrasion, weathering, chemicals and rough site handling.
Centralisation Feature
Multiple centralisation bolts positioned around the product ensure accurate alignment and secure fit during installation
3D Model Loading…
Innovative Gripping
Enhanced Type 2 end-load restraint provides strong, reliable grip and prevents pipe pull-out during operation.
Positive Stop
Visual confirmation of correct installation through clear metal-to-metal contact between clamp bands.
Corrosion Protection
All cast components coated in Black Rilsan Nylon 11 for exceptional resistance to impact, abrasion, weathering, chemicals and rough site handling.
Centralisation Feature
Multiple centralisation bolts positioned around the product ensure accurate alignment and secure fit during installation.
3D Model Loading…
For Rapid Deployment and Proven Asset Integrity
The Viking Johnson AquaFast range is successfully deployed across global networks to provide tool-free, permanent, and leak-free jointing for PE and PVC pipelines. Explore our project portfolio below. Viking Johnson Large Diameter couplings and adaptors are successfully deployed across countless international projects, reinforcing critical water supply infrastructure and significantly reducing network water loss. Explore our project portfolio below.
Project: New AquaFast Large Diameter Specified for A14 Road Improvement Scheme
Viking Johnson supplied AquaFast, including the new 355mm size, for phase one of the Highways England A14 Cambridge to Huntingdon scheme.
Project: AquaFast Large Diameter – Selby Bypass
The A63 Selby Bypass is a 10 km single carriageway built to relieve severe traffic problems in Selby town, North Yorkshire.
Project: Making Drinking Water Systems More Reliable
Viking Johnson’s AquaFast product was selected to provide a bespoke solution for SETHA Bobingy.
GB Viking Johnson – AquaFast Large Diameter Specified for A14 Road Improvement Scheme
Viking Johnson – AquaFast Large Diameter Specified for A14 Road Improvement Scheme.
AquaFast Downloads
View the Knowledge HubAquaFast Coupling – Large Diameter 355-450mm
AquaFast Coupling 63-315mm
AquaFast Flange Adaptor – Large Diameter 355-450mm
AquaFast Flange Adaptor 63-315mm
GB Viking Johnson – AquaFast Large Diameter Specified for A14 Road Improvement Scheme
Viking Johnson – AquaFast Large Diameter Specified for A14 Road Improvement Scheme.



