How do I connect a hot water tank?

The choice of the storage heater is directly related to its characteristics, the conditions of the future location and the connection.

The installation of the device includes the installation, integration into the water supply system, connection to the electricity network and arrangement of the entire structure with a safety valve. Compliance with all the rules results in a qualitative end result.

Choice of water heater and space for installation

When selecting a DHW cylinder, the most important distinguishing parameters must be taken into account:


A properly selected performance parameter allows all users to regularly use hot water in sufficient quantity.


This option applies to electric storage models. The presence of high performance features accelerates the process of heating water, but can be an obstacle when connected. The electrical wiring space has its own indications of current strength. Exceeding the permissible load on the power line will damage the last or permanent tripping of the protection automation.


The different volume of the heating tank is directly related to the dimensions of the whole appliance. If you choose a device, you should know in advance where to install it and compare the parameters of the room zone with the dimensions of the boiler.

Installation method

It could be:

  • horizontal;
  • vertical;
  • fixed to the wall;
  • outdoors

The choice of any type is determined by the installation possibilities and the preferences of the owner.

Total mass

Most hot water tanks are wall-mounted. When making your choice, it is worth calculating the total mass of the appliance and the water it contains.

When installing, you should always take into account the strength properties of the material from which the walls are made and calculate their resistance to the load fixing boiler.

Choose a place for the installation of the heating tank:

Ensure convenient connection and subsequent maintenance.

Choose a place for the installation that allows the device to be placed as conveniently as possible for others.

Consider the comfort of the boiler to gain access to the power control and on/off devices of the appliance.

You should always consider the possibility of an emergency escape of liquid and place the appliance in a location where the consequences of such an accident are minimal and easily removable.

Preparing the Installation

Before you begin any installation or installation work, familiarize yourself with the instructions provided with the unit and ensure that all conditions are met.

Next: should:

  • Check the availability and compliance of all fasteners;
  • Prepare the necessary tools;
  • Check the energy efficiency of the wiring in the installation area;
  • Prepare the necessary pipes, fittings, valves
  • Connection steps

For floor installation, the unit is placed in the correct position.

In order to perform wall mounting, you must first create a marker to accurately identify the location where the fasteners will be installed.

The following steps should be performed one after the other:

Drill holes in the wall.

Install anchors with hooks in them. Such fixings are of different types:

  • expanding;
  • wedge-shaped;
  • Bush;
  • Hang the heater on the fasteners

The following actions apply to all types of water heaters:

Switch off the cold water supply to the part of the system where the installation of the pipe for the cold water supply of the boiler is carried out.

Decentralised hot water supply

In a multi-party house, a decentralised hot water supply is advantageous as the boilers are installed where they are needed and can be adjusted in size. For example, larger boilers are needed in the kitchen and bathroom than in a guest toilet, where hot water is heated only for the sink.

Solar storage boiler as an alternative to the hot water storage tank

A cheaper way to operate a boiler is solar energy. This variant is particularly worthwhile because such solar storage tanks have higher storage volumes than the “normal” devices.

In contrast to conventional boilers, they are divided into two areas: At the bottom of the storage tank is the cold water, which is heated by spirals and rises upwards due to its lower density in the boiler. From there it is passed on to the point of use. Due to the high thermal insulation, hardly any heat is lost, even if it is stored for several days.

Solar storage boilers work with two heat exchangers. The first is installed in the lower area of the storage tank and gives off heat to the storage tank when the temperature fluctuates slightly. The second is mounted in the upper area and serves for auxiliary heating when the solar heat is not sufficient to cover demand in bad weather or in winter. This exchanger is usually connected to the central heating system.

Above all, these local hot water tanks enable exact cost accounting and the short pipe runs reduce heat loss. Find out what is the right water heater for your home through subscribing at Water Tech Advice on YouTube channel.