
A Skid Tank that almost operates itself. The AquaMaster 4000 makes work easier by being so reliable and easy-to-use that owners use it more than originally intended, meaning they can take on bigger jobs without taking on more stress.
The AquaMaster 4000 is a purpose-built 4000L skid tank water cart designed for New Zealand civil and infrastructure crews who need high-volume water on site without the complications. We built it to be one of the easiest skid tanks to use, because we know operators want the advantages of a large water capacity without the headaches that often come with it. Load it onto any flat deck or tipper truck with a 5,000 kg or greater payload capacity and you are ready to work.
Because the AquaMaster 4000 sits on a skid frame rather than a trailer, it moves between vehicles without downtime. Strap it down, unstrap it, shift it to another truck, and you are back to work. There is no dedicated trailer to register, warrant, or maintain. The unit is built to handle the bumps, vibration, and repeated loading that comes with daily worksite use, so you don’t have to handle the unit with extra care every time it moves. Camlock fittings make refilling fast, whether you are connecting to a fire hydrant, a tanker, or a standpipe on site.
A 25 m wash down hose unreels easily and puts water exactly where you need it, operating at 60 L/min out the nozzle. For higher volume delivery, the flood jet nozzle runs at 120 L/min and is the go-to option for dust suppression on road maintenance patches, unsealed yard preparation, and subdivision earthworks. Integrated dust suppression nozzles let the operator apply water across a wide spray pattern without leaving the machine, and the optional remote on/off switch means dust suppression can be managed entirely from the cab of the truck.
The optional remote on/off switch lets the operator control water flow from inside the cab, which is particularly useful on roading crews where the driver is also managing traffic and site conditions. It is available as an add-on and is worth considering for any application where stopping the truck to adjust the flow is impractical or unsafe.
| Feature | AquaMaster 2000 (Base Configuration) |
AquaMaster 4000 (Base Configuration) |
AquaMaster 6000 (Base Configuration) |
|---|---|---|---|
| Format | Trailer (towable water cart) | Skid tank (mounted on truck) | Skid tank (mounted on truck) |
| Water tank capacity | 2,000 L | 4,000 L | 6,000 L |
| Best suited for | Small to medium contractors who need a versatile, towable unit; also large scale contractors | Civil crews running flat deck or tipper trucks on medium worksites | Large civil and roading jobs that need fewer refills and longer run times |
| High flow pump max flow rate | 120 L/min (out the flood jet nozzle) | 120 L/min (out the nozzle) | 120 L/min (out the nozzle) |
| Max water blaster pressure | 3,500 PSI (built in water blaster) | Not applicable (no high pressure blaster) | Not applicable (no high pressure blaster) |
| Wash down hose | 60 L/min, 25 m length | 60 L/min, 25 m length | 60 L/min, 25 m length |
| High pressure hose | 30 m (extendable on request) | Not applicable | Not applicable |
| Engine (water pump) | Honda GX200, electric start, twin impeller | Honda GX200, electric start, twin impeller | Honda GX200, electric start, twin impeller |
| Engine (water blaster) | Honda GX690, electric start, 20 L petrol tank | Not applicable | Not applicable |
| Dimensions (L x W x H) | 4.6 x 2.02 x 1.65 m | 4.0 x 1.8 x 1.5 m | 5.0 x 1.8 x 1.5 m |
| Transport requirement | Any vehicle with min. 2,500 kg towing capacity | Truck with 5,000 kg+ payload capacity | Truck with 7,000 kg+ payload capacity |
| Loading | Towed on dual hitch coupling (1-7/8" and 50 mm) | Tied down on flat deck or tipper truck; can also be lifted on by slings or strops | Integrated forklift slots; can also be tied down on flat deck or tipper truck, or lifted with slings or strops |
| Refill system | Built in overhead refill hose; Camlock fittings for quick refill | Camlock fittings for quick refill; built in overhead refill hose | Camlock fittings for quick refill; built in overhead refill hose |
| Dust suppression nozzles | Available via flood jet nozzle setup (currently 1x flood jet nozzle on adjustable bracket) | Integrated dust suppression nozzles (currently 1x flood jet nozzle on adjustable bracket) | Integrated dust suppression nozzles (currently 1x flood jet nozzle on adjustable bracket) |
| Remote on/off control | Available as an extra | Available as an extra | Available as an extra |
| Typical use cases | Drain cleaning, paint prep, surface cleaning, tree watering, dust suppression, fire fighting support, core drilling, pipe testing | Dust suppression, road maintenance patches, yard preparation, large area watering | Large worksite dust suppression, roading, subdivision development, infrastructure projects |
| Consideration | AquaMaster water carts | Generic imported water trailer | Hiring a water cart |
|---|---|---|---|
| Build quality | Purpose built in New Zealand using premium components and Honda engines for proven reliability | Often built to a price point with unbranded engines and lighter chassis | Varies depending on the hire company and age of the fleet |
| Suitability for NZ conditions | Designed for New Zealand civil, roading and infrastructure worksites | Generic specification not tailored to NZ towing rules or worksite needs | Generally fit for purpose, but model availability is not guaranteed |
| Versatility | Three formats covering trailer and skid tank with optional water blaster and dust suppression | Single configuration with limited options | Limited to whatever is available on the day |
| Long term cost | Higher upfront investment, lower cost per hour over the life of the machine | Lower upfront cost, higher risk of downtime and component failure | No capital outlay, but cost adds up quickly on long projects |
| After sales support | NZ based support, parts and servicing through Master Machinery | Often limited or no local support for parts and warranty claims | Maintenance is the hire company's responsibility |
| Customisation | Configurable through the Master Machinery quote builder (pump size, lighting, remote on/off etc.) | Take it or leave it specification | No customisation |
| Resale value | Strong resale due to brand recognition and proven build quality in NZ | Weak resale on imported generic units | Not applicable |
| Best for | Contractors, hire companies, councils and infrastructure businesses planning ongoing utilisation | Buyers prioritising the lowest possible upfront cost | One off projects or contractors testing demand before purchasing |
| Use case | AquaMaster 2000 (Base Configuration) |
AquaMaster 4000 (Base Configuration) |
AquaMaster 6000 (Base Configuration) |
|---|---|---|---|
| Drain cleaning and culvert blasting | Best fit (Recommended) | Not suitable | Not suitable |
| High pressure cleaning of plant and machinery | Best fit (Recommended) | Not suitable | Not suitable |
| Bridge and surface cleaning (graffiti, grime, lichen) | Best fit (Recommended) | Not suitable | Not suitable |
| Pipe testing and core drilling water supply | Best fit (Recommended) | Suitable | Suitable |
| Tree watering and landscape irrigation on subdivisions | Suitable | Best fit (Recommended) | Best fit |
| Compaction and concrete work in remote locations | Suitable | Best fit | Best fit (Recommended) |
| Dust suppression on small to medium sites | Suitable | Best fit | Best fit (Recommended) |
| Dust suppression on large civil and roading sites | Possible, but limited | Suitable | Best fit (Recommended) |
| Road maintenance patch preparation | Suitable | Best fit | Best fit (Recommended) |
| Long duration jobs requiring fewer refills | Not ideal | Suitable | Best fit (Recommended) |
| Sites without truck access (towed by ute) | Best fit (Recommended) | Not suitable | Not suitable |
| Fire fighting support on rural blocks | Best fit (Recommended) | Suitable | Suitable |
Features & Benefits
Easily transported on any truck with a 5,000 kg or greater payload capacity. No dedicated trailer required, which means no separate registration, WOF, or compliance overhead.







Yes. Master Machinery is based in New Zealand and supplies AquaMaster water carts to civil, roading, infrastructure, council and hire customers across both the North and South Islands. Buying from a NZ supplier means parts, service and warranty support are handled locally, with no overseas shipping delays for spares. Contact our team for the current delivery and service footprint near you.
Yes. We are happy to complete supplier pre-qualification documentation for council supplier panels, large civil contractor approved-supplier lists, and Government Electronic Tenders Service (GETS) registrations. We can provide GST registration, NZBN, public liability insurance certificate of currency, and answers to standard health & safety pre-qualification questions on request. Please contact our team to start the supplier onboarding process.
Lead time depends on the model, the configuration you specify, and our current production schedule. We sometimes have stock units available for shorter delivery windows. For an accurate build slot estimate based on your spec, please contact our team early when planning your purchase or fleet renewal so we can lock in a delivery window.
Yes. The AquaMaster range is built to be configured. Common customisations include pump and hose specification, remote on/off control (4000 and 6000), lighting, dust suppression nozzle layout, and livery / fleet branding so the unit matches your existing fleet standards. Tell us your spec when you enquire and we will quote accordingly.
Yes. We work with hire companies (e.g. operators with multiple branches across NZ) and large civil and roading contractors who buy in volume or roll units out in stages. Fleet quotes are tailored to order size, configuration and delivery schedule. Pricing is reviewed every six months against supplier costs and market benchmarks. Contact our team to discuss a fleet quote.
Submit an enquiry via the product page or call our team. For a tailored quote we will ask for your intended use, preferred configuration (pump options, hose length, remote control, lighting), delivery location and target delivery date. Quotes are issued on Master Machinery letterhead in NZD and include the line items your finance provider, council or board needs to sign off. Re-issued copies are available if your approval timeline runs long.
The AquaMaster 4000 fits any flat deck or tipper truck with at least 5,000 kg payload capacity. The AquaMaster 6000 needs a truck with at least 7,000 kg payload capacity. Both are designed to be tied down quickly and shifted between trucks. The AquaMaster 6000 has integrated forklift slots so it can be loaded and unloaded safely without slings or strops. For laden weights and CoF / RUC implications, check your truck's certificate of loading.
Yes. We arrange delivery of AquaMaster water carts across the North and South Islands, including Auckland, Waikato, Bay of Plenty, Hawke's Bay, Wellington, Nelson / Tasman, Canterbury, Otago and Southland. Delivery is quoted separately based on delivery address and whether the unit is being shipped to a yard, depot or directly to a job site. Customers can also collect from our facility or arrange their own freight if preferred.
Yes. Under the Health and Safety at Work Act (HSWA) and WorkSafe NZ guidance, NZ contractors are expected to control airborne dust on civil, roading and demolition sites - including respirable crystalline silica from cutting, grinding and earthworks. The AquaMaster's flood jet nozzle (up to 120 L/min) and washdown hose (up to 60 L/min) deliver controlled water application to keep dust down across road maintenance, compaction, demolition and earthworks. See our Insights article Dust Suppression vs. Dust Control for more.
No. The AquaMaster range is designed for industrial and civil applications - dust suppression, washdown, compaction, drain and culvert cleaning, surface cleaning, tree watering and similar uses. It is not certified for the carriage of potable water for human consumption (which in NZ falls under Taumata Arowai - the Water Services Authority - and requires a separate certified water carrier). If your project specifies potable water, please contact a Taumata Arowai-registered bulk water carrier.
Each new AquaMaster is supplied with a Master Machinery warranty covering build and components, plus the original manufacturer warranties on the Honda GX200 and GX690 engines. Full warranty terms (duration, coverage, exclusions and claims process) are issued in writing with the quote and the machine handover pack. Please request a copy of the warranty schedule when asking for your quote.
Yes. We support AquaMaster owners from within New Zealand with after-sales service, genuine spare parts and operator advice. Service intervals follow the operator manual and the Honda engine service schedule. We can advise on common wear items - hoses, nozzles, filters, fittings - to hold as fleet stock so machines are not held off jobs waiting for parts. Contact our team for parts orders and service support.
We can provide specification sheets, the operator manual, safe-use instructions, the warranty schedule, public liability insurance certificate of currency, GST and NZBN details, and a formal quote on company letterhead to support council, board or governance sign-off. For infrastructure and utility customers we can also respond to standard pre-qualification questions used in council and government tenders. Tell our team what documentation pack your approval process needs when you enquire.
Yes. The AquaMaster is widely used to manage dust on civil, roading and earthworks sites across NZ where regional councils (e.g. Auckland Council, Otago Regional Council, Environment Canterbury) set air quality and nuisance dust rules under the Resource Management Act and regional air plans. The combination of a high-flow flood jet nozzle and washdown hose lets operators apply enough water to suppress dust without over-watering the site. Specific consent and discharge requirements depend on your regional council - check your local rules.
Yes. Many of our customers - particularly SMEs and owner-operators - finance an AquaMaster purchase through their preferred asset finance lender or equipment lease provider in NZ (such as their bank, UDC, Heartland or specialist asset finance brokers). Master Machinery does not lend directly, but we supply the documentation your finance provider needs - formal quote, machine specification, serial number and compliance plate - to assess and approve the deal. Tell our team if you are financing so we can prepare the paperwork.
All AquaMaster prices we list and quote are in New Zealand dollars (NZD) and exclude GST unless otherwise stated. GST is added on the formal tax invoice at the prevailing NZ rate (currently 15%). Delivery, optional extras and any specialised configuration are quoted as separate line items so you can see the total cost clearly before committing.
Standard payment terms are a deposit on order to secure the build slot, with the balance due prior to delivery. For approved fleet customers and trade accounts we can discuss alternative arrangements. Bank transfer (direct credit) is the preferred payment method, and full GST tax invoices are issued for every transaction so you can claim GST and depreciation correctly with Inland Revenue.
It depends on usage. NZ daily and weekly hire rates for towable water carts add up quickly, so contractors using a water cart on multiple jobs typically reach a payback point within a relatively short time versus ongoing hire. Owning also gives you full control over availability, configuration and downtime. For Hire or Buy a Water Cart in NZ? for a worked example, and our team can model the numbers against your expected usage.
We consider trade-ins on a case-by-case basis where it makes sense for both parties - typically where the trade-in is in saleable condition. If you have a unit you want to trade against a new AquaMaster, send our team a description, hours of use and photos along with your enquiry, and we will respond on whether we can offer a trade-in price.
AquaMaster water carts are typically purchased as business plant and equipment, and most NZ businesses depreciate them over the asset's useful life under Inland Revenue's general depreciation rates for similar plant. Depreciation treatment depends on your specific tax position. Master Machinery does not provide tax advice, and we recommend confirming the correct depreciation rate, asset class and treatment with your accountant or tax advisor before purchase.
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Key Contacts

Jeremy
Business Development
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