No Call Out Charge

Free Estimates

Multiple Payment Options

Trained Professionals

Satisfaction Guaranteed

Fast and Friendly Service


Hot Water Cylinder Installations in Portsmouth

Most people in the UK need hot water for bathing and other uses at home. While some homeowners and landlords have a central heating installation on their properties, others prefer hot water tanks. Hot water cylinders heat and store hot water that goes to your bathroom and taps. They get cold water in and heat it with an immersion heater so that hot water rises to the top. In most tanks, the cold water tap is at the bottom while the hot water tap is at the top. The immersion heater is at the bottom of the tank. No1PHD will help convert your house into a dream home by installing a top of the range hot water cylinder for you.

Different types of hot water cylinders

No1PHD installs both vented and unvented cylinders for clients in Portsmouth. As the name suggests, unvented cylinders do not have vent pipes to release excess water, unlike vented tanks. The main difference between vented and unvented cylinders is that unvented cylinders have much more pressure than their vented counterparts. They have safety mechanisms such as expansion vessels, twin thermostats, and pressure relieve valves to facilitate the expansion of water at high pressures.

The other difference is that unvented cylinders can get cold water directly from the mains while vented cylinders get it from a storage tank placed in the loft to boost its pressure. The tank acts as the expansion mechanism for the heated water. The fact that unvented cylinders take cold water from the mains means that the hot water going to your shower and tap has the same pressure as that in the mains.

Both types of cylinders have their pros and cons. Unvented cylinders take less space because they do not require storage tanks. On the other hand, vented cylinders supply you with hot water even when there is no mains supply because there will be water in the storage tank.

The Installation

If you are installing hot water cylinders on your property for the first time, you will need to buy the cylinders as well as a lot of pipes and valves to connect it to the different outlets such as taps and bathrooms. However, if it is a replacement, you will only need to buy the cylinder and a few other parts that need replacement and modification. A much better way would be for you to enlist our services from the start so that we can measure the pipework, make adjustments to the property, and recommend the best cylinder brand in that’s sized to the requirements. The total cost will depend on the type, size, and the brand you choose.

Trustpilot Starred Logo

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

blue quotation marks
Ellipse 1
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.

blue quotation marks
Ellipse 1
Miss Carey

1 month ago

Why hire us?

Whether you are replacing your old vented cylinder with an unvented one or just want a hot water system in your home, apartment or even commercial premises, we will install it for you. Our plumbers have G3 plumbing certifications and permits to operate in Portsmouth. They are experts in installing both types of hot water cylinders. No1PHD has a reputation for delivering quality plumbing services and understands the warranty requirements for different types of cylinders. We will ensure that the installation and the heating comply with the warranty for the best results.

Contact us

Call No1PHD on 08006906777 for further consultations on the type of hot water cylinder you want to install on your property. Our plumbers are experienced and friendly professionals who know all the boroughs in Portsmouth and will arrive at your home or commercial premises with a smile.

24 hour callout

emergency service


5 stars
white quotation marks

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
white quotation marks

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

Got a problem?

map marker