In case we require a sump for public water supply, it can be positioned slightly lower than the setback ground level, to regain the site space for a green patch, vehicle parking, outdoor seats or such other possibilities.
It is strange to see how we tend to classify design and construction decisions as important or ignorable and then act upon them accordingly. Those felt to be less important issues suffer for no fault of theirs, water sumps being part of this list of the ignored.
If we ask building owners how much time and attention they have paid towards the water sumps, the majority would be surprised and then may say how minimum it has been.
In most projects, the team would discuss the location of the sump without going over the options, specifications and the budgeting which if discussed could be judiciously resolved. Building owners simply go with the project team who, more often than not, advise larger sumps to avoid possible future complaints, of course at the cost of the owners.
Surprisingly, one reason for the sump size to get reduced is lack of space in the setback to build a larger one! It is a fact that 24 hours supply with good pressure eliminates the need for a sump for individual houses and surprisingly, per person per day need for water would be the same irrespective of water coming directly or through the sump.
In case we require a sump for public water supply, it can be positioned slightly lower than the setback ground level, to regain the site space for green patch, vehicle parking, outdoor seats or such other possibilities. Only the manhole cover, required to get into the sump for maintenance, needs to be at the normal ground level.
To enable stepping down, no mild steel members should be inserted, though the plastic frame steps can be tried. However, using a ladder to get down instead of inserting any kind of step members eliminates wall joints, hence reduces the danger of seepage. With new kinds of mechanised tank cleaning systems now being introduced in large cities, the need to get into the tank is slowly being eliminated.
Unless the soil condition demands so, there is no need for a RCC tank, which today has become a mindless routine practice among many builders. With lesser consumption of money and material, normal brick tank with mesh plastering does the same performance. If the inside is painted with anti-fungal paints or paints specially prepared for water tanks, maintenance jobs also reduce drastically.
Most of us are familiar with the morning sound of water pump, called the monoblock pump. Nowadays it is being replaced by the submersible pump, a three-times costlier option with more silent operation. Technically the monoblock option continues to be a good one considering its pricing and long life, if the muffing sound is not unbearable. In the event of minor repair, it is also easy to check them out.
However, as time changes, our practices also change. Let us accept the new in case of technical advantage, but question if it harms the nature to benefit only the few.