Water tank disinfection in Al Faysaliyah (near Hawtat Sudayr)

Yes, because many sediment deposits and bacteria do not change the colour or taste of the water at first. A ground tank under the floor can have a small unnoticed external seep, and a rooftop tank faces the extreme summer heat, which speeds up algae growth on the inner walls. The water looking clear does not mean the tank floor is free of sediment.

Washing removes visible sediment and the dirt clinging to the walls and floor of the tank. Disinfection is the step that follows, targeting what washing alone leaves behind. That is why many homeowners ask for drinking-water tank disinfection alongside the wash, and we go through the details with you when you call.

A faint chlorine smell in water from the mains supply is normal, but if the smell is strong or persists after storage it may come from a previous disinfection that was not fully flushed, or from something leaching from the tank walls. Chlorine tank disinfection is a common method, and doing it correctly requires a precise dose and a thorough flush afterwards.

You do not need to empty it yourself beforehand. When you call we tell you what to have ready, and usually it is enough to give easy access to the tank opening and to reduce the pump feed from the mains if you can. Anything to do with draining is agreed in advance according to the type and size of your tank.

There is no single answer for every situation, because the frequency depends on the water source, the condition of the tank, its position and how much it is exposed to light and heat. A rooftop tank facing a harsh summer needs closer attention than an insulated ground tank. If you notice any change in the taste or smell of your water, that is enough reason to ask for a check.

The most repeated mistake is adding the disinfectant without measuring it against the tank's volume, either too much so a chlorine smell stays in the water, or too little so the disinfection is incomplete. The second common mistake is skipping a full flush after the contact time is up, which leaves the water unusable for a while after finishing.

In many cases the faint smell you had stopped noticing disappears, the water runs clear when it sits still, and the fine deposits that sometimes appeared at the bottom of a vessel are gone. How noticeable the difference is depends on how much had built up before the disinfection, and you usually notice it with the first use after the tank refills.

The odd smell in a tank often comes from accumulated deposits and dust. Disinfection removes these deposits and the factors causing the smell, so water returns to having a clean taste and smell.

The steps after disinfection and when you can use the water depend on the disinfection method and tank condition. We'll explain the details when we come to disinfect the tank.