Replacing a hot water system is not always a straight swap, and location is the reason.
Units need clearances around them, both for safe operation and so they can be serviced. Gas units additionally need adequate ventilation and correct flue arrangements, and those requirements differ between indoor and outdoor installations. Heat pumps need airflow and generate noise, which affects where they can reasonably sit relative to windows and neighbouring properties.
Every storage system also needs somewhere for its relief valve to discharge safely. That discharge has to go where hot water leaving under pressure will not scald anyone or damage anything, and where it is visible enough that a fault is noticed.
Changing from one type to another is where the constraints bite. A like for like replacement in an existing position is usually straightforward. Changing fuel source, moving the unit, or switching to a heat pump can bring in new pipework, electrical or gas work, and different clearance requirements.
Working this out before ordering a unit avoids discovering it on installation day.
If a hot water system is leaking, making unusual noises, or delivering water hot enough to scald, switch it off at the isolation point if you can do so safely and call a licensed plumber. Tempering valves and pressure relief valves are not do it yourself items, and a failed relief valve can be dangerous.
If you can smell gas, do not switch anything on or off. Turn off the gas at the meter if it is safe to reach, open doors and windows, leave the property, then call us or the gas emergency line. Gas work must be carried out by a licensed gas fitter, so please do not attempt a repair yourself.
