Pipe Repair products offer a fast, safe way to seal splits, holes, and corroded sections instantly – often under full system pressure – avoiding the need for expensive and time-consuming network shutdowns.
MaxiFit Couplings deliver wide-tolerance connections for multiple pipe materials, ideal for repair applications, offering 6° angularity and simple installation using a single spanner across the entire range.
While Viking Johnson has tested and approved the use of MaxiFit on gas, please verify that the network owner sanctions the use of the fitting for your intended application.
Caveat 3
There are restrictions on the minimum thickness of the stainless steel, PVC-U and GRP pipes for them to work with Viking Johnson flexible couplings. Consult Viking Johnson for further guidance.
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MaxiFit Couplings
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A Versatile Solution for Pipe Jointing.
Universal Pipe Connections
MaxiFit couplings connects plain-ended pipes across a wide range of outside diameters and materials, including steel, ductile iron, PVC, cast iron, GRP and asbestos cement. This versatility allows one fitting to replace multiple material-specific options, improving efficiency and reducing inventory complexity.
Wide Tolerance Design
With up to 34 mm OD tolerance, MaxiFit couplings simplifies installation and reduces the need for trial holes. The broad tolerance range also lowers stock requirements and increases turnover by covering more pipe scenarios with fewer sizes.
Pressure Performance
All MaxiFit couplings are tested to 24 bar (water) and 9 bar (gas), supporting working pressures of 16 bar (water) and 6 bar (gas). This ensures reliable sealing performance across demanding applications. Review pressure ratings.
Versatile Repair Capability
MaxiFit has a material flexibility and wide tolerance making it ideal for cutting out and replacing damaged pipe sections. Fewer sizes are needed for emergency repairs, and MaxiFit enhances accessibility in confined spaces.
Quick & Efficient Installation
Pre-assembled gaskets with ‘slide-easy’ ribs reduce friction and maintain sealing pressure even on corroded or scored pipes. Captive non-rotating bolt heads allow installation with a single spanner and one standard torque. MaxiFit improves bolt access in narrow trenches.
Quality & Compliance
Manufactured under BS EN ISO 9001, the range meets UK Water Regulations and BS EN 14525, with DN40–DN300 independently tested by BSI.
Why Choose MaxiFit Couplings
Time saving – The MaxiFit proven design delivers fast installation.
Built-in angular flexibility – Handles natural pipeline movement from ground settlement. 6° deflection on couplings for reliable alignment.
Wide tolerance – Reduces the need for large stock holdings.
Over-torque tested – Can withstand 1.5 × maximum recommended torque without failure.
50-year design life – Extreme testing through accelerated ageing at 80°C under pressure for 1000 hours.
Rilsan coating – Provides exceptional protection against corrosion, impact, abrasion, and chemicals.
Design Benefits
Optimised Gasket Design
A unique gasket with distinctive circumferential ribs provides a ‘slide easy’ fit for maximum sealing on scored, corroded, or pitted pipe.
Flexible Fit
Flared end to the sleeve forms a deep gasket chamber to give maximum possible pipe adjustment.
Excellent Corrosion & Damage Resistance
Coated in black Rilsan Nylon 11 which is WRAS listed and has excellent resistance to impact, abrasion, weathering and chemicals. It also has good thermal stability and flexibility to accommodate for rough site handling.
Simple Installation
All the MaxiFit products have captive, non-rotating bolt heads require just a torque wrench to install. Some MaxiFit products also have a unique 3 bolt system for quicker and easier installation within narrow trenchs.
Long Sleeved Large Diameter MaxiFit
Large Diameter MaxiFit couplings DN350-DN700 have a long sleeve length as standard; this is a major benefit to the installer, allowing for greater cutting tolerances and a greater pipe insertion depth sealing beyond corrosion damaged pipe ends to create a safe and permanent repair.
Water
Waste Water
Gas
