Regarding power shower replacement ~ Please read

Power showers should have isolation valves already fitted just before connections to the power shower - Sometimes they are visible above the shower on the wall, in the loft directly above the power shower or behind the shower in a cupboard. The reason there should be isolation valves is to allow replacement of your old power shower without the need to drain down the tank and hot water cylinder. We have to charge £99 extra if we have to drain down the system and fit isolation valves if it is discovered when we arrive that no isolation valves have previously been fitted. Draining down the system takes time and opens up the possibility of air locks in the system when refilling. If your original power shower was fitted by a professional then there will be isolation valves in place.

Regarding power shower replacement ~ Please read

Power showers should have isolation valves already fitted just before connections to the power shower - Sometimes they are visible above the shower on the wall, in the loft directly above the power shower or behind the shower in a cupboard. The reason there should be isolation valves is to allow replacement of your old power shower without the need to drain down the tank and hot water cylinder. We have to charge £99 extra if we have to drain down the system and fit isolation valves if it is discovered when we arrive that no isolation valves have previously been fitted. Draining down the system takes time and opens up the possibility of air locks in the system when refilling. If your original power shower was fitted by a professional then there will be isolation valves in place.