In a food trailer or food truck, water is often the “silent killer” of the operation. When it is well sorted, nobody even notices. When it isn’t – suddenly you are dealing with hand washing that doesn’t work, a full waste water tank, weak pressure or hygiene issues at an event.
In this article, you will find a practical overview of:
- which water and waste water solutions are used in practice,
- how to set up water refilling and waste water draining,
- how to look after the system so that it is hygienic and reliable,
- and what to keep in mind when designing it for your type of concept.
1) How the water system in a food trailer or food truck typically works
Most mobile operations are not permanently connected to the water mains. That is why a combination is used:
- clean water tank,
- waste water tank,
- pump (for pressure),
- and, as needed, water heating.
This system is especially practical at events: you can operate without permanent infrastructure and still maintain hygiene.
2) Our standard (Gastronova) – a proven set-up for most concepts
To make the system work in practice and not be “on the edge”, we usually design the water system as follows:
- 2 sinks (depending on the concept and hygiene)
- instantaneous water heater or small 6L boiler (depending on the type of operation)
- pump with a water filter
- 2 × 40 L tanks:
- 1× tank for clean water
- 1× tank for waste water
Such a set-up is versatile, easy to service and sufficient for many concepts, provided you have a refilling and draining routine in place.
3) Filling with water: from outside into the tank or directly via a hose
To make refilling water practical and hygienic, our system is designed so that filling is always done from outside:
- either you fill the tank for clean water,
- or you have the option of a direct hose connection (when water is available on site).
This is especially important at events – you don’t want to deal with buckets and improvisation, but a quick refill without disrupting service.
Tip from practice: use a hose intended for drinking water and store it separately from “technical” hoses (to minimise odours and contamination).
4) Water heating: instantaneous heater vs. 6L boiler
Hot water is often key for hygiene and staff comfort. The most common solutions in a food trailer or food truck are:
Instantaneous water heater
- advantage: hot water “on demand”, without waiting for a tank to heat up
- suitable: when water is used often and briefly (hands, a quick rinse)
Small 6L boiler
- advantage: stable water temperature, simple operation
- suitable: when you want hot water ready even under fluctuating conditions
Safety tip: with a boiler, always make sure it is filled with water before switching it on.
5) Waste water: draining via a floor valve (from outside) or a permanent connection
Waste water comes from hand washing, rinsing and sanitation. The key is to have a clear and quick way of draining it.
In our trailers, draining is designed so that:
- draining is via a valve in the floor and is done from outside,
- and, if needed, the system can also be set up for a direct permanent connection (when you have a fixed location with a drain).
The advantage of an external valve: you drain the tank without touching the interior or dismantling cabinets.
6) How much water does a food trailer or food truck really need?
The most important thing is not to look only at tank capacity, but at the reality of the concept:
- bar / drinks concept: water is used for hand washing, rinsing, sanitation
- street food and hot kitchen: higher consumption (utensils, work surfaces, hygiene)
- coffee bar: depends on whether you use disposables or wash a lot of dishes
Practical recommendation: set up a simple routine:
- when you refill clean water (e.g. before the event + mid-day),
- when you drain waste water (e.g. after the event or when full),
- who is responsible and where the “service point” is.
7) Maintenance and an “anti-odour” routine
The most common cause of odour is not the water itself – but a neglected tank, hoses and residue in the drain.
I recommend:
- regular flushing of the system (especially after events),
- ongoing cleaning of filters,
- not leaving water standing unnecessarily long,
- fully draining and winterising the system before winter.
Summary and final recommendation (Gastronova)
If you want your food trailer or food truck to run stress-free, water and waste water must be designed as carefully as the electrics:
- clarify your concept and the intensity of operation,
- choose the right water heating method (instantaneous vs 6L boiler),
- set up a refilling and draining routine (an external valve is a game-changer),
- and have a simple maintenance routine so that the system doesn’t smell and works reliably.
If you’d like to see related topics:
- Hygiene: https://gastronova.eu/sluzby/hygiena/
- Catering equipment and accessories: https://gastronova.eu/kategoria-produktu/prislusenstvo-hlavne/gastro-vybavenie/
- Concepts: https://gastronova.eu/koncepty/
- Tailor-made catering concept (Streetfood Service): https://gastronova.eu/sluzby/gastro-koncept-na-mieru/
- Financing: https://gastronova.eu/sluzby/financovanie/
FAQ – Water and waste water in a food trailer or food truck
1) What is the standard water system in a food trailer or food truck?
Most often it is a system of clean water tank + waste water tank + pump (pressure) + water heating. The advantage is that you can operate without permanent connections while still maintaining hygiene.
2) How many litres of water do I need in a food trailer or food truck?
It depends on the concept, the number of staff and whether you wash dishes or rely more on disposables. As a standard, the set-up often used is a 2× 40 L tank (clean + waste), while with higher volumes the refilling/draining routine during the day is what matters most.
3) How does filling with water work in a food trailer or food truck?
It is practical and hygienic to have filling from outside – either into the clean water tank or via the option of a direct hose connection, when water is available on site.
4) How is waste water drained from a food trailer or food truck?
The most practical option is draining via a valve in the floor operated from outside. At a fixed location, the system can also have a permanent direct connection to the drain.
5) Is an instantaneous water heater or a 6L boiler better?
- Instantaneous water heater is great when you want hot water “on demand” and use it often and briefly (hands, a quick rinse).
- A 6L boiler makes sense when you want a stable temperature and a simple reserve of hot water.
6) Why does the water or waste water in my system smell?
The most common reasons are standing water, clogged hoses, a dirty filter or residue in the drain. A simple routine helps: regular flushing, cleaning the filters and not leaving water standing unnecessarily long (especially between events).
7) Can I drain waste water anywhere?
No. Waste water should only be drained at designated points (collection stations, approved outlets, back-of-house facilities). Do not drain it onto car parks, into storm drains or into nature.
8) What is the minimum I should have for hygiene?
The minimum for most concepts: a separate hand-wash basin + a sink for dishes/utensils.
For concepts with ingredient preparation (vegetables / meat): we recommend also allowing for a separate solution for washing food, or a clear time separation with sanitation between tasks – to minimise the risk of cross-contamination.