This guide is for site managers and contractors planning water tanker hire for construction who want the truck to arrive once, set up for the job. It covers what to settle before booking: use, water quality, outlet, volume, filling point and site access, with questions to ask the supplier.
What will the water be used for?
Write the use first. Everything else follows from it.
| Use | What the tanker usually needs | Main risk |
|---|---|---|
| Dust control on haul roads and cleared ground | Spray bar or sprinkler on the tanker | Too little coverage, or mud on the road |
| Soil compaction | Controlled, even spraying | Over-wetting makes the ground soft |
| Curing concrete | Hose or low-pressure spray | Wrong source, or uneven wetting. For the pour itself, see the ready-mix pour-day checklist |
| Washing machines and wheels | Hose with enough pressure | Run-off into drains or places it should not go |
| Filling cabins, tanks or a camp | Hose or pump outlet | Water that is not suitable for drinking |
Many sites need two or three of these. Tell the supplier all of them, as you may need a different set-up for each.
Does the water need to be drinking quality?
Decide this before you ask for a quote. It changes which tanker you can use.
Water for drinking, kitchens or washing people needs a tank kept for drinking water. It also needs a filling source suitable for drinking water, and clean hoses and fittings. A tank that has carried other liquids should not be used, even if it looks clean. Rules for potable water differ by site owner, municipality and project, so confirm what applies before you book.
Ask the supplier:
- Is this tank used only for water, or has it carried anything else?
- How is the tank cleaned, and when was it last cleaned?
- What source will the tanker fill from?
- Can they show any paperwork the site owner or authority requires for drinking water?
For dust control, washing machines and most general site use, drinking quality is usually not the point. Say so clearly, so nobody pays for more than the job needs, but check your site rules first. Label any non-drinking water point so nobody drinks from it.
How should the water come out of the tanker?
This is the detail that most often causes a wasted trip. A tanker that arrives with the wrong outlet cannot do the job, however much water it carries.
- Spray bar or sprinkler. Fitted on the tanker; not every tanker has one. This is what you want for dust suppression on roads and open ground.
- Hose or pump outlet. This is what you need to fill storage tanks, cabins or a wash area.
Say which one you need in the request, or both. Also ask whether the tanker has its own pump or relies on gravity. A gravity outlet cannot fill a tank that sits higher than the tanker's outlet, and it is slow even for a low one. If the storage tank is raised, ask for a tanker with its own pump.
How much water, and how often?
Estimate the need use by use. Ask the engineer or foreman how many spray passes a day, how many hours of washing, and what the storage tank holds, then add them up. Divide the daily total by the tanker's rated capacity to get the trips. For example, if your daily need is three times the rated capacity, one tanker needs at least three full trips a day.
Then check that one truck can make them. Compare the round-trip time (fill, haul, discharge, return) with your working hours. Hot, dry weather can raise the dust-control need, so allow a margin.
One cubic metre of water is 1,000 litres and weighs about one tonne, so a full tanker carries a heavy load. That water counts towards the vehicle's gross weight and the load on the ground it drives over. Ask the supplier for the tanker's rated capacity, and do not ask for a fuller load than it is rated for. Soft ground, ramps and temporary roads need checking for this reason.
A partly filled tank can surge forward when the truck brakes. Ask the supplier whether the tank has internal baffles, and keep ramps and slopes to what the driver is comfortable with.
For compaction, think in controlled amounts. Soil compacts best near its optimum moisture content, which depends on the soil and is set by the engineer or the project specification. Too little water and it will not bind; too much and the ground turns soft. For choosing the machine itself, see how to choose a plate compactor, rammer or roller.
Give the supplier the total volume per day, how many deliveries you expect, and whether the work repeats daily.
Where is the water filled and where does it go?
A tanker trip has three parts: filling, hauling and delivering. Ask whether the quoted job covers all three.
- Who arranges the water source?
- Does the quote include filling the tanker, or only hauling and delivering?
- How far is the filling point from your site? This affects how many deliveries one truck can make.
- How will each load be recorded? Ask for a delivery note or trip ticket signed by your site contact, so the trips you are billed for match the water you received.
If you arrange the source, tell the supplier where it is and how the tanker will access it. If the supplier does, ask what source they will use. Before the first delivery, confirm with the client or site owner which water source is acceptable for dust control, compaction or concrete work. Acceptable sources depend on the site owner and the job, and a source that is wrong for the work can cause a rejected delivery or rework.
Also tell the driver exactly where to discharge. A pin on a map and a named contact on site save a lot of phone calls. Put the point of use in the request, not only the site address.
Can the tanker reach and turn on your site?
A loaded tanker is long, heavy and hard to turn. Check the route before you book.
- Check the gate width and any height limits, such as cables or pipes.
- Check the surface from the gate to the discharge point. A full tanker can sink into loose fill or sand.
- Check where it will turn. A dead-end track with no turning area is a common problem.
- Check any soft ground, trenches or open excavations near the route.
- Tell the driver the route and the right gate in advance.
If the site is hard to reach, say so in the request. Ask whether the supplier will deliver to the gate or come to the point of use.
Watch out. Never ask a driver to cross ground you have not checked. A loaded tanker that gets stuck blocks the site and needs recovery equipment.
Should you add a storage tank on site?
Often, yes. A static water tank changes how deliveries work:
- The tanker unloads quickly and leaves, rather than waiting while you use the water.
- You have a reserve if a delivery is late or the road is blocked.
- Other crews can draw water from the tank without calling for a truck.
Some suppliers also offer water tanks with the delivery service; ask if yours does. Ask about the tank's base and connections, and how the tank will be filled and emptied. The site set-up checklist shows where water fits with power and cabins.
For sewage or septic removal, you need a different truck. See how to book a vacuum truck or septic tanker.
How to do this on Maedah
Post one request through the request form. Choose water tankers, your city and the site on the map. In the description, write the use of the water, whether it must be drinking quality, the outlet you need, the filling arrangement, and the access notes.
Then compare the quotes side by side. Look at what each includes: filling, delivery, number of trips and response time. Suppliers do not see each other's prices. Agree payment and anything else directly with the chosen supplier. For help with wording, see what to write in an equipment rental request.
