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Water Tank Installations

Many homes have a complex water system that is usually integrated with a boiler, central heating and shower. The entire system is dependant on hot and cold water tanks situated in the loft and airing cupboard. If your home is more than fifty years old, the cold water tank could be constructed of compressed asbestos or galvanised iron. Although such tanks are long-lasting, many years of unavoidable deterioration could be tainting your water supply with debris and rust, leading to a metallic aftertaste in your drinking water. Old, brittle lids crack with age, allowing vermin to access the water. Opting for a new, hygienic water tank installation in Southampton is fast and efficient with No1PHD. Call us today and we’ll provide expert advice and a free quote.

Signs of a Faulty Water Tank

There are several warning signs that your water tanks need attention from our No1PHD plumbing engineers:

  • Puddles of water around the hot water tank
  • Water dripping through the ceiling from a cold water tank
  • Low water pressure
  • Hissing noises
  • Hot water supply is unheated
  • Discoloured water
  • Debris in the water supply

Different Types of Water Tank

Older homes, equipped with a standard central heating system, usually rely on three main water tanks:

Cold Water Tank

A cold water tank is usually installed in the loft cavity and frequently only supplies water to the bathroom taps, leaving the kitchen tap to take water directly from the mains supply. However, in some residential homes in Southampton, the cold water storage tank also supplies the kitchen and the deterioration of the tank can seriously affect your drinking water quality. Today’s cold water tanks are manufactured from food grade plastic such as polyethylene and polypropylene. Some cold water tanks have exterior shells of fibreglass and are lined with polypropylene. Both versions are highly durable, hygienic and safe.


Cold Water Header or Expansion Tank

This cold water tank is smaller than the one designed for drinking water storage and is used to supply the central heating system. When the water expands during heating, the header tank accommodates the excess. When opting for a loft conversion, valuable space can be saved by a new combination boiler installation which dispenses with the need for a header tank.


Hot Water Tank

A hot water tank is traditionally installed in an airing cupboard. Cylindrical in design, it is usually manufactured from copper, stainless steel or carbon steel with a lining of vitreous glass to prevent it corroding. Hot water problems can include a faulty relief valve which affects the buildup of internal pressure. Increasing high pressure can lead to the tank splitting and flooding your home with scalding hot water or it can actually explode. Ageing hot water tanks can often develop weaknesses in welded seams. The size of the tank frequently depends on the number of bathrooms and showers a home might have.

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Absolutely blown away by the service we received. Took all the stress out of losing our heating and hot water. Highly recommended!

5 star review

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Mr Wells

2 weeks ago

Couldn’t have asked for a faster resolution to our drainage conundrum. Nothing was too much for these guys who were brilliant throughout.

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Miss Carey

1 month ago

Professional Water Tank Installation in Southampton

Your home’s system of water tanks is highly intricate and requires professional repair and installation. Hot water tanks in particular need to be routinely maintained to ensure the pressure gauge is working accurately. Our experienced plumbing engineers are highly qualified in all aspects of cold water tank installation and maintenance in Southampton. Call us now on 01425 208031 or email us at, for a free quote.

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5 stars
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After noticing that the house was unusually cold, we found that the heating wasn’t coming on and that our hot water had also failed. We called the team at No 1 PHD who dispatched an engineer to investigate. After discovering that the culprit was a faulty boiler part, they ordered in a new part and got it fitted as quickly as possible. The guys were great, and we couldn’t be happier.

Mr Lincoln

5 stars
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For days, we’ve noticed a foul smell coming from outside and a gurgling sound coming from one of the drains. Whenever it would rain, the area around it would flood slightly and take ages to drain. We tried buying drain unblockers, but none seemed effective. Eventually, we turned to No 1 PHD and were left wondering why we didn’t do this sooner.

Mrs Griffin

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