Hotel Water Tank Cleaning Schedule: Occupancy Seasons, Vacant Rooms and Showers

A hotel packs into one building what is normally spread across several: bedrooms, kitchens, laundries, pools and sometimes health clubs. And a guest will not tolerate losing water even for an hour. These features make hotel water tank cleaning an exercise in operational planning more than a cleaning job.

Here we focus on what matters to hotels and serviced apartments: scheduling by season, working without disturbing guests, and the vacant-room problem few people talk about. The basic cleaning and disinfection steps are explained on our tank cleaning and disinfection service page.

What makes hotel tanks different?

The WHO guidance on water safety in buildings treats hotels among buildings with complex water systems. The WHO fact sheet on legionellosis states that infection spreads by breathing in droplets of contaminated water, and that sources include hot and cold water systems and whirlpool spas. A shower in a hotel room is exactly a source of droplets of that kind.

When should hotel tanks be cleaned across the Saudi seasons?

Occupancy seasons in the Kingdom differ from city to city, and that decides the best timing. The rule: clean several weeks before the high season, not at its peak and not straight after it.

• Hotels in Makkah and Madinah: peaks fall in Ramadan and the Hajj season, so clean well before them, leaving enough time to fix whatever is found.
• Summer resort hotels such as Abha and Taif: the peak is summer, so spring is the best time to clean.
• Hotels in Riyadh, Jeddah and business cities: occupancy follows exhibitions and events, so pick a week without major events.
• Small serviced apartments: more flexibility, and cleaning can take place mid-week when occupancy is lower.

Within a single day, the lowest-demand hours are usually after midnight and before breakfast and laundry start-up. That window is enough to clean one compartment of a divided tank, and the other compartment is cleaned the following night.

If cleaning uncovers a cracked tank or a damaged lid, a gap before the season lets you repair it without pressure. Cleaning in the last week before the peak leaves the hotel with two bad options: postponing the repair, or closing a tank compartment just when it is needed.

How do you clean hotel tanks without disturbing guests?

1. 1

   Review the network diagram with the hotel engineer

   Identify the tanks and compartments, which sections each feeds, and whether an alternative route exists during the work.

2. 2

   Choose the lowest-occupancy nights

   By checking the reservation system, and informing reception, housekeeping and the kitchen in advance.

3. 3

   Clean one compartment each night

   The compartment is isolated while the other stays in service, then cleaned, disinfected, rinsed and returned to service before morning.

4. 4

   Monitor pressure and temperature

   Water pressure on the upper floors is watched during the work so guests do not notice a weak shower.

5. 5

   Flush vacant rooms afterwards

   Every tap and shower in unoccupied rooms is opened for a few minutes to push old water out of the pipes.

6. 6

   Record it in the maintenance log

   Reports for each compartment are kept with date and photos, ready for any audit.

Vacant rooms: the weakest link in hotel water systems

A tank can be perfectly clean, yet the guest still receives water that has sat for weeks in the room's pipes. Rooms that stay closed in low season, or floors closed for renovation, hold water that is not renewed. The WHO recommends flushing unused taps weekly to reduce stagnation.

The European technical guidelines on preventing Legionella infection, published by the European Centre for Disease Prevention and Control in 2017, are aimed at those investigating travel-associated infections, and cover investigation and remedial work in hotels and other accommodation. That is why international hotel chains take care to document everything that concerns their water systems.

Kitchen, laundry and central water heaters

A hotel kitchen starts breakfast preparation in the early hours, and the laundry runs large loads in the morning. So the cleaned compartment must be back in service well before then, and the kitchen supply line should be flushed first. Large central water heaters collect sediment at the bottom, and engineering is well advised to coordinate draining and inspecting them in the same week the tanks are cleaned, so their sediment does not pass into clean water.

Who manages hotel tanks and who carries out the work?

In large hotels the engineering department manages tanks, pumps and heaters, and contracts a specialist provider to do the cleaning. In small serviced apartments the owner or manager may handle everything. In both cases one person must be responsible for the schedule and the log.

If the hotel runs a restaurant open to the public, food-establishment requirements apply to its kitchen as well, and you will find the details in our guide to restaurant tank cleaning and municipality requirements. Rooftop tanks exposed to the sun in mid-sized hotel buildings benefit from tank insulation to keep cold water cooler. A hotel can request an inspection through Azl and set up a night-time schedule that suits its occupancy.