Treloar Products

We specialise in engineering and supplying reliable critical fluid transfer equipment for tank trucks, service stations, terminals, depots, gas production plants and more.

Click on the product category or search for the product you are after and view the products below.

  • Tank Truck Equipment
  • Service Station Equipment
  • Nozzles & Dispensing Equipment
  • Terminal & Depot Equipment
  • Fluid Transfer Fittings
  • Valve Products
  • Projects

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Order codes Spares

1400 - Standard

1500 - Hi-pressure










A quick, reliable and inexpensive way to verify flow rate and direction & monitor colour and clarity in fluid lines.

Dollar for dollar, sight flow indicators are the most cost efficient and effective way to visually monitor the flow of fluids and to determine where, if any, problems exist at certain points along the industrial process line. Applications include:
Chemical industry, power plants, petroleum industry, waste water treatment, manufacturing and OEM Markets.


Easy Access bolt on design:

VISI-FLO’s® unique bolt-on design fastens the face plate assembly directly to the body with no special torqueing sequence. This provides quick, complete access to the unit from the front side, which gives companies the flexibility to install VISI-FLO® in locations where other sight flow indicators cannot be installed due to clearance problems. Tie rod design sight flow indicators present challenges when it comes to fastening the lens and seal to the body.

No Leak guarantee:

Due principally to the failure of conventional flat seals, the complaint most often registered against sight flow indicators is that they leak. VISI-FLO® is guaranteed not to leak for three full years under normal use. The key design attributes that enable OPW’s innovative radial sealing design is so good, it’s guaranteed not to leak!

Maintenance-Free Design:

Visi-Flo’s unique, bolt-on-body design requires no special maintenance or torqueing sequence be followed to prevent leaks. This results in a safer, more reliable sight flow indicator than units using tie rods to fasten lens and seal to body.


Sizes:  1/4" to 12"
Body Material: Carbon Steel, Bronze, 316 Stainless Steel, Ductile iron
Pressure: Up to 600PSI
Seals: Viton, Nitrile, Neoprene, EPT, Teflon, FFKM
Connection: Threaded or flanged

Four Indicator Styles:

• Propeller – The best way to show flow of opaque liquids. Ideal for observation at a distance. Flow from right to left is standard. Specify if left to right flow is needed. Not recommended for flow rates above 100 GPM.
• Bi-Directional Flapper – This indicator points in either direction to show you at a glance which way the liquid is flowing.
• Bi-Directional Plain – When the colour and clarity of your liquid are of prime importance.
• Drip Tube – Ideal for gravity, extremely low or intermittent flow. Keeps product from dripping on the glass. Assures constant see-through for vertical lines.

Latest news

Aug 23, 2021
Discover how Treloar’s 3 Seal Swivel Joints can save you time and money
Having served Australian industries for close to a century, Treloar has evolved into an industry leading supplier of high-quality critical fluid handling products and services. Offering proven and dependable products and high technical standards, we are committed to the continual improvement of our ...

Aug 06, 2021
Treloar Trading during COVID-19
NSW health advice issues stay at home order for our local Hunter area We will continue to operate as usual with warehouse still shipping orders

Jun 23, 2021
Stepping up with WLT Folding Stairs
With a commitment to finding the best possible solutions for our clients, we were recently approached by Coogee Chemicals with a unique challenge. As the producer of industrial, agricultural and mineral processing chemicals, Coogee Chemicals needed to upgrade their Sodium Hypochlorite and Sodium ...

Jun 01, 2021
Australian first trial of ARTA dry breaks
At Treloar, we’re committed to working with our customers to find the best possible solutions and are proud of our ability to go the extra mile by offering servicing, spare parts and technical abilities.

Sep 29, 2020
Welcome to our new digital home
As you may have noticed, things have changed a little bit around here.