The right gear for drinking water
Pumps to clear sludge, scrubbing to remove biofilm, and disinfectant meant for potable storage.

Al Mazloom is one of four historic quarters inside the old walled city, with tightly packed heritage stone and timber buildings in the roshan style, narrow winding lanes and a dense ancient urban fabric. Tanks here are old and shared among several flats, and the pipework is older than the tank itself. A site inspection will not tell you what is inside the tank until you open it, and the sediment builds up thick and dark. What you see from outside does not match what sits at the bottom.
The shared tank in Al Mazloom may be older than the building itself or fitted into a narrow space between adjoining roofs. For the method itself, see how we approach water tank cleaning.
Pipes in these old quarters are rarely replaced because they run deep inside walls and are difficult to extract. Rust and lime scale deposit on the inside, so water passes through a layer of corrosion before entering the tank. Sediment begins in the pipework, not just the tank, and by the time water sits in the tank it has already carried particles.
Old buildings have flats from ground to third or fourth floor, and water rises through narrow vertical pipes. Upper floors pull water with more force and stir sediment from the bottom, while ground floor flats draw water darker and muddier than those above, the worst in the cycle.
Old tanks on the roofs of historic quarters may sit under wooden covers or have no seal at all. Humidity, dust, leaves and small animals enter the tank easily from above, and the tank atmosphere stays damp and contaminated even between water uses.
Al Mazloom lies in the north east of Al Balad, home to heritage stone and timber buildings in the roshan style, with Al Shafii Mosque and Souk Al Jami nearby, a very dense and very old urban fabric.
Tank inspection in Al Mazloom reveals thick black sediment and sometimes internal rust, with walls covered in a sticky layer of algae and mineral scale.
Draining old water from an Al Mazloom tank produces very dark black water, and the smell is often unpleasant from deep sediment accumulated over many years.
Sediment vacuumed from the floor of this old quarter's tank removes a large volume of thick black sludge and suspended matter built up across decades.
Manual scrubbing of walls and floor in such an old tank requires considerable effort to remove thick layers and deeply rooted algae and biofilm.
Disinfecting interior surfaces in an Al Mazloom tank kills bacteria and fungi accumulated over years inside the old tank and ancient pipework.
Final rinse and lid check in Al Mazloom ensures the tank is sealed against small animals and dust entering from deteriorating roofs in this very old quarter.
The supply into the tank is shut and the tank is drained completely.
The sludge on the floor is scooped and pumped out first.
The biofilm on the walls is physically scrubbed off.
With the walls and floor clean, a disinfectant made for drinking-water storage is applied and given time to act on every surface.
The disinfectant and any loosened residue are rinsed down and pumped out, so the first tank of water after us is not carrying it.
We check the cover seal and inlet before refilling, so dust and insects stay out, then start the refill while you watch it run clear.
Historic district: close-set buildings, narrow lanes and ageing services
Historic in Al Mazloom means the tank, pipes and roofs are all very old, so sediment is thick, rust is deep and contamination has accumulated over decades. Cleaning takes longer and may require follow-up monitoring.
Pumps to clear sludge, scrubbing to remove biofilm, and disinfectant meant for potable storage.
We send a team, not one person, so a tank is drained, cleaned, disinfected and refilled in a single visit rather than left open for days.
We look at the lid seal and inlet, because a tank that got dirty fast usually has a way in.
Nothing is closed until the tank is refilling and you have seen the water run clean.
Photographs from real jobs carried out by the crew.












The commitment is simple enough to actually keep: we do not leave until the tank is disinfected, refilling, and you have seen it for yourself.
Central Jeddah is the old heart of the city: Al Balad with its coral stone houses, and the dense apartment quarters around it with shops beneath the flats. Floors here are often terrazzo or older ceramic tile, worn smooth and easily stained by cooking grease that drifts up from the street. Older kitchens and bathrooms carry heavy scale on taps and around drains, and pipework in the older blocks leaves rust marks in basins. Rugs and curtains take on the fine black dust of the main roads, so they need washing more often than elsewhere.
We provide these in Al Mazloom too, and more than one can share a single visit.