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Southampton Hot Water Cylinder Installations

If you think hot water cylinders are old style heating, think again. Over 11-million UK households still have a water cylinder, and with so many homeowners switching to renewable energy, hot water cylinders are making a comeback. Our Southampton based heating engineers can survey your current heating system, discuss what you want to achieve, and suggest the best cylinder to realise your aims.

Reasons for choosing – or moving – a hot water cylinder

Many homes don’t have the luxury of choosing whether to use gas or electricity for their heating. In these situations, our heating engineers can suggest measures like upgrading your cylinder to a modern, pre-lagged model. They can suggest the size of cylinder needed, make sure your immersion heater is working correctly, check and upgrade thermostats, and ensure your water is heated on the cheapest tariff. But what about those with gas heating, why would they want a hot water cylinder?

Upping the pressure

Although combi-boilers are designed to do away with the need for a hot water tank, they are not necessarily suitable for larger families with high water needs, such as bathroom and en-suite showers working together. With a combi, the more outlets opened, the greater the drop in water pressure. These properties are better suited to a vented or unvented heating system, which incorporates a hot water cylinder.

Vented and unvented systems

Both vented and unvented hot water systems use a hot water tank, and the water can be heated either from the gas boiler, or an immersion heater. The difference being that the vented system feeds the cylinder by gravity from a cold water tank in the loft. The unvented system feeds the tank directly from the mains. However, there may come a time when you want to change from a vented system to an unvented system, to get rid of the cold water tank in the loft.

In this situation you can keep your existing water cylinder, although our heating engineer will need to alter the feed and install an expansion unit. If your existing water cylinder doesn’t have an immersion heater, consider asking on of our Southampton plumbing and heating engineers to install one. That way you have a back-up hot water system should your boiler fail or gas supply have to be shut off.

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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

Moving your water cylinder

Many people assume their water cylinder has to stay where it is. Usually in the airing cupboard in the bathroom, but it doesn’t. For instance if you’re considering a bathroom upgrade or extension, and need the space taken up by the cylinder cupboard, have a chat with your No1 PHD heating engineer. If you have a large bedroom next to the bathroom, the cylinder can be moved and installed inside the wardrobe. If necessary, it can even be moved downstairs to your integral garage. Preferably inside a purpose built cupboard to minimise heat loss.

Renewable energy

Finally, renewable energy is becoming increasingly popular amongst homeowners in the Southampton area, using solar power to provide their electricity needs. If you’re contemplating lowering your carbon footprint, contact No1 PHD’s Southampton engineers to discuss the installation of a hot water cylinder, or how your existing cylinder can be converted to operate from solar energy. By installing a solar power diverter into the system, any excess energy your solar panels generate is diverted to the immersion heater, effectively keeping your water hot for no extra cost.

Contact Us

For all your questions and queries regarding the repair, installation or moving of your hot water cylinder, please contact No1 PHD Southampton, on 01425 208031 or email us at,

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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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