An Overview of a Hot and cold water supply systems

In the hot-water supply system, cold water is drawn from the ground, and then heated by an electric resistance heater or a gas boiler. The hot water is sent to a fixture faucet when you wish to use it. The cold-water supply system, on the other hand, involves supplying water from a source of cold water (ground/river) to your various plumbing fixtures via gravity or under pressure.

The hot and cold water supply system combines both systems aforementioned so that there’s an uninterrupted supply of both hot and cold water in your plumbing fixtures at all times. For installation of hot and cold supply systems in your building, chrelectmep limited is one company you cannot overlook. They have the technical know-how or expertise when it comes to services like the installation of hot and cold water supply systems.

Now that we have seen what each type of supply entails, it is time we look at how they are classified further:

Components of a cold water supply system

The cold water supply system has the following components:

  • Cold water tank
  • Rising main
  • Water meter
  • Stop valve
  • Water mains
  • Cold water storage tank

Water meter

To measure the amount of water used, a water meter is installed at the beginning of the supply pipe. The water meter works on the principle of displacement or velocity giving a reading in meters per hour. It is made of a cast iron or cast steel body with an inner mechanism that can be removed with little difficulty for servicing. Water meters are generally classified as either positive displacement meters, which are more precise and intended for measuring large flow rates, or velocity type meters, which use impeller blades to measure flow rate and are suited for smaller flows such as those found in residential homes. Modern domestic water meter designs fall into one of three categories: single-jet (velocity), multi-jet (displacement), and oval gear type (displacement).

Stop valve

The stop valve is usually located next to the water meter. It is a brass valve that can be turned to shut off the water supply. This typically takes the form of a gate valve (shown below) or a ball valve. The stop valve is sometimes referred to as a stopcock, and it allows for simple water isolation for installations such as taps, showers, and toilets. Stop valves are generally installed in areas where there isn’t already another type of isolation method. For example, if your house has copper pipes instead of plastic pipes, you may have an isolation valve fitted onto each tap as well as having an overall stopcock fitted before the rising main from the meter.

Rising main

Water is a serious business. It’s vital to your health, and it gets turned on and off in your house multiple times a day (or, at least, it should). If there’s one thing that can go wrong with any water system—and there are many—it’s a rising main. Essentially, this is where the water pressure from your house rises above the threshold of the pipes’ capacity. Every pipe immediately starts pouring water into every other pipe until all of them overflow or back up into the street. In turn, this can cause problems with your toilet flushing, sprinklers flowing erratically in your yard and garden, and even just dripping water on people waiting for the bus!

Luckily for you, we’re here to help explain what a rising main is made of and how you can prevent these problems from happening in your home.

Hot and cold water supply system

  • Hot Water Supply

The hot water supply is located on the leftmost side of the picture. The tank you see on top of the boiler is known as a header tank, with a pump inside it. This pump moves the water around to where it’s needed in the house.

Hot water is supplied from the boiler to radiators, which are found in each room. When you turn your thermostat up or down, you control how hot you want your house to be overall—but that thermostat doesn’t actually tell individual radiators whether or not to heat up. Instead, each radiator has its own valve that can be turned all the way open or closed completely.

 Most people adjust them based on how far away from a window they are; for example, if your radiator is near a window and gets too warm even when fully closed, insulate it with bubble wrap for more efficiency! If a radiator is near an outside wall and isn’t getting hot enough, try opening its valve more so that it heats up faster and better!

  • Cold Water Supply

The cold water system can be found on right side of this picture. You’ll notice there’s no boiler here—just pipes leading into your home from an external faucet or hose connection nearby (positioned at a 90 degree angle). These pipes feed straight into any heater unit without having first been heated by another source like steam pressure from above!

Component of a hot water supply system

Here is a list of the common components you will find in a hot water supply system:

  • Hot water cylinder – this is where the hot water for household uses is stored. Its size depends on the number and types of fixtures installed in your house.
  • Boiler – used to heat up water, as needed, and send it to the cylinder. Some boiler systems are also designed to produce and store hot water even without relying on cylinder storage; these are called combination boilers.
  • Pumps – moves the heated water from the boiler through pipes inside your home, into radiators and hot taps.
  • Controls – controls when heating begins and stops, depending on whether there’s demand for hot air or not. The controls may be manual (timer-operated), semi-automatic (thermostat), or fully automatic (weather compensator).
  • Storage tanks – allow you to use an additional source of heating for your hot water needs, mainly renewable energy sources such as solar power or heat pumps. These storage tanks are quite large because they need enough space to hold all the heated water from your primary heating source (usually an oil-fired boiler). The tank insulates its contents so that they retain their warmth longer than if they were simply stored in cylinders. These storage tanks can be found in homes that have more than one bathroom; hence they require multiple showers running at any given time during peak usage hours in a day.


A hot and cold water system is one in which warm water from a boiler is pumped to radiators around the house and cold water flows from the mains.

In these systems, the water that flows to outlets in your home is cold; it’s heated by a radiator system. Your boiler heats water and pumps it through the radiator pipes to warm the air in each room. A pump forces cold water from the mains up into your boiler where it gets heated by a gas burner.

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