Pipe Coupling supplier in Australia

Industrial Pipe Couplings – Flexible, High-Pressure & Repair Solutions

Dewater Products supplies a wide range of industrial-grade pipe couplings for joining plain-ended pipes across pressure, drainage, and suction pipelines. Whether you’re specifying for infrastructure, process water, fire protection, or general pipeline repairs, our range includes flexible, axially restrained, and stepped pipe couplings from trusted global manufacturers.

We offer fast delivery across Australia and expert technical support to help you find the right coupling solution. Call us on 1300 271 290 for advice or contact us online.

Combo Lock

Combo Lock

  • Size From: 114.3mm x 110.0mm
  • Body: 316ss/EPDM
  • Pressure Range: 0 TO 28 BAR
See Options

Compare Pipe Coupling Options

Use the tables below to compare Straub and Orbit pipe coupling models by application type, size range, and pressure rating.

Straub Couplings – Swiss Engineered Performance

Model Size Range Pressure Rating Notes
Metal Grip 30.0 – 609.6mm 67 – 5 Bar Axially restrained steel coupling
Grip L 26.9 – 609.6mm 46 – 1 Bar Restraint for wider OD range
Metal Grip GT 60.3 – 139.7mm 37 – 32 Bar High-pressure, compact grip
Metal Grip Fire Fence 26.9 – 406.4mm 67 – 8 Bar Fire-rated restraint coupling
Eco Grip 26.9 – 168.3mm 6 Bar Lightweight economy version
Combi Grip 38.0 – 162.0mm 16 Bar Mixed material connection
Plast Grip 39.0 – 162.0mm 16 Bar Designed for plastic pipes
Flex 1L / 2 / 3 / 4 48.3 – 4064.0mm 25 – 1 Bar Flexible, non-restrained
Open Flex 1L / 2 / 3 / GT 48.3 – 4064.0mm 25 – 1 Bar Split-body style for repair access
Step Flex 2 / 3 250.0 – 4094.0mm 25 – 2 Bar For joining different OD pipes
Clamp SCE / SCZ 44.0 – 420.0mm 16 – 5 Bar Encapsulating clamp for live repairs

Orbit Couplings – Australian Industrial Range

Model Size Range Pressure Rating Notes
Flex Grip S / L / 2–4 20.0 – 4064.0mm 32 – 2.5 Bar Restrained pipe joining solution
Flex Grip Open S / L 20.0 – 355.6mm 32 – 8 Bar Repair clamps with split sleeve
Metal Lock S / L 20.0 – 406.4mm 32 – 12 Bar High-strength stainless coupling
Fire Protection Coupling 20.0 – 406.4mm 32 – 12 Bar Fire system compatible
Plast Coupling 63.0 – 315.0mm 20 – 16 Bar Designed for PE/PVC pipe connections
Combo Lock 38.0 – 162.0mm 16 Bar For mixed pipe types (plastic + steel)
Stepped Coupling 30.0 – 114.3mm 16 Bar Joins mismatched diameter pipes
Open Flex 200 / 300 / 400-L 148.0 – 1524.0mm 25 – 2 Bar Non-restrained coupling

Common Applications

  • Pressure systems (potable water, mining, industrial plants)
  • Drainage and sewer lines
  • Fire protection systems
  • Temporary or emergency repairs
  • Vibration and movement zones (e.g., pump stations)
  • Joining dissimilar materials (PVC to HDPE, steel to ductile iron)

Selecting the Right Pipe Coupling

Application Recommended Type
Joining same-sized pipes Flex Grip / Metal Lock / Straub Metal
Repair clamp for leaking section Orbit Open Flex / Straub Open Flex
Joining different OD pipes Stepped Coupling / Step Flex
Plastic-to-metal pipe join Orbit Combo Lock / Straub Combi Grip
Fire systems Straub Fire Fence / Orbit FP Coupling
Misalignment or movement Flex or Open Flex Series

Installation Notes

  • All couplings require minimal pipe prep – no welding, threading, or beveling.
  • Torque values are indicated on each coupling.
  • Open-style couplings (Straub Open Flex, Orbit Open Flex) are ideal for retrofit work.

Frequently Asked Questions

  • Can I use Orbit or Straub couplings on potable water lines?
    Yes – Orbit couplings are fitted with WRAS-approved EPDM rubber seals suitable for potable water.
  • What’s the difference between restrained and non-restrained couplings?
    Restrained couplings (e.g., Flex Grip, Metal Grip) prevent axial pipe movement. Non-restrained versions (e.g., Flex/Open Flex) allow for movement and vibration but need pipe anchoring.
  • Do you ship across Australia?
    Yes – we offer free delivery Australia-wide on most couplings.
  • What’s the lead time?
    Most Orbit models are in stock and ship within 1–2 business days. Straub lead times vary based on model and size – contact us for ETA.
  • What if my pipe diameters don’t match exactly?
    Use a stepped coupling or consult us for a custom-fit recommendation.

Need a Quotation?

We supply bulk quantities for infrastructure, utilities, and civil contractors. Contact us using the details below:

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