Do I need a water tank

Do you need a water tank in the loft with a combi boiler?

Asked by Luke on 19th Aug 2025
Expert Trade Answers
"No you do not need a water tank in your loft for a combination boiler"
Answered on 19th Aug 2025 - Member since Jun 2024 - report
"Hi Luke, no you wouldn't require tanks in the loft with a combi boiler."
Answered on 19th Aug 2025 - Member since Aug 2025 - report
"No you don’t need any water storage tanks if you have a combi boiler installed"
Answered on 19th Aug 2025 - Member since Aug 2023 - report
"No you don’t need a water tank any longer with a combi boiler as it is fed directly from you’re mains water supply."
Answered on 19th Aug 2025 - Member since Jun 2025 - report
"Hi, no header tank required in the loft for your heating or hot water, with a combination boiler the boiler is mains water fead and the heating side is a completely sealed system. Hopes this helps. Thanks Steve."
Answered on 19th Aug 2025 - Member since Jul 2025 - report
"No you won’t, it comes straight off of the mains, so a water tank is no longer needed"
Answered on 19th Aug 2025 - Member since Sep 2024 - report
"No you don't need a water tank with a combi boiler it's instant hot water"
Answered on 19th Aug 2025 - Member since Nov 2024 - report
"Hi Luke. No water storage tanks are required in your property for a combi boiler to function. It runs directly from your mains water supply."
Answered on 19th Aug 2025 - Member since Oct 2024 - report
"No you dont require a water tank in the loft with a combi boiler"
Answered on 19th Aug 2025 - Member since Oct 2024 - report
"No, if the combi has a pressure vessel it will heat the system instantaneously. but you can find that if someone runs a tap elsewhere it can fluctuate depending on the boiler. If the boiler does not contain a pressure vessel you will need to install one on the system for the heating side."
Answered on 19th Aug 2025 - Member since Jul 2025 - report
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