Here’s how instant water heaters can be installed, the right way!

Published on : June 23, 2023

Instant water heaters have gained popularity majorly due to its multi-purpose use. In cities like Mumbai, instant water heaters are mainly used in bathroom applications due to its compact size and ability to deliver hot water in quick time. On the other hand, in cities like Delhi, Bangalore and Hyderabad they are used for kitchen applications as well.

A.O. Smith has launched premium Instant water Heaters to fulfil the customers’ requirements, be it for bathing or for kitchen usage. The advantages of A.O. Smith Water Heaters are multifold, here are a few.

Get instant hot water – Say goodbye to the days where you had to wait for minutes to get hot water. With an O. Smith Instant Water Heater, get hot water on demand.

Longer life – A. O. Smith Instant water heaters are built to last. The advanced Blue Diamond® glass-lined tank technology used in its design ensures that they have a longer lifespan than traditional water heaters.

Designed for high-rise buildings – With 8 Bar Pressure rating, O. Smith Instant water heaters are designed for high-rise buildings.

Stronger construction quality – The quality of O. Smith Instant water heaters with 2mm thickness is best in class. They are built to withstand high water pressure and resist corrosion, making them highly durable.

5 years tank warranty – A. O. Smith Instant water heaters come with a 5-year tank warranty, providing you with peace of mind and assurance of hot water anytime you need.

Here’s a step-by-step guide to install your brand-new instant water heater, the right way:

Pre-Installation Preparation

Before you begin installing an A. O. Smith instant water heater, you need to gather the following tools and materials:

  • Instant water heater: A. O. Smith FastOn, MiniBot, or EWS series
  • Appropriate-sized connection pipes. These are available in standard lengths of 1.5, 2 & 3 Ft. With MiniBot you get a standard pipe set included with the product at no extra cost.
  • Teflon tape
  • Drilling Machine and appropriate drill bit
  • Screwdriver
  • Adjustable wrench
  • Safety equipment (such as gloves and goggles)

Installation Process

Before you begin installing, turn off your home’s main water supply. This will prevent any leaks during the installation process.

Choose an appropriate location to install the water heater. Ensure that the location has easy access to water lines and electrical supplies. Additionally, ensure that the location has proper ventilation and is away from any flammable materials/areas

Step 1: Mounting the Water Heater: 

  • Use the Mounting Template provided to mark holes.
  • Use a driller to drill 2 holes at least 35mm deep in the wall, and make sure the two holes are aligned.
  • Insert the expansion anchor into the hole and ensure that you maintain at least 20 mm between the concrete wall and mounting screw head.
  • Fix the water heater steadily onto the mounting screw through the mounting slot.

Step 2: Connect the Water Supply:

  • Start by connecting the multi-function safety valve to the inlet pipe and connecting the cold-water pipe to the inlet pipe as well.
  • Following this, link the hot water pipe to the outlet pipe.
  • Then, use Teflon tape around these pipes to prevent leaks.

Step 3: Fill the Water Tank:

  • Begin this step by opening the outlet faucet for trapped air to escape.
  • Fill the water heater tank completely before switching on the water heater.
  • At this stage, ensure that the multi-function safety valve is connected.
  • Lastly, connect to the power supply, and your instant water heater is ready for use!


Upgrading to an A. O. Smith Instant water heater is a smart choice that can save you money in the long run. The installation process is straightforward and can be completed in just a few hours. With proper installation and maintenance, your instant water heater will provide you hot water on demand for years to come.

Here is a video of the entire installation process, to help you navigate the process of installing your instant geyser.

Call an A. O. Smith service technician on toll-free number(give number) for technical support & assistance in installing the instant water heater. Check out our range of instant water heaters here!



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