Problems living with stored water

We bought a house last year with water storage. Like you, we were a bit apprehensive. 

It turns out that the house has a normal mains water supply. It also has an underground tank (served from the mains water) to store water for use in the event of a drop in mains pressure, or mains water supply interruption. 

A pump is installed, with a pressure switch. If the pressure of the water entering the house drops below the set point, the pump kicks in. There is a 3-stage filter to clean up the water (supposedly to make it drinkable, but we prefer bottled water).

The house had been unoccupied for a couple of years when we took possession. The filters looked decidedly dodgy, so we had the cartridges replaced (about a hundred Euros). We have since worked out that these cartridges can be bought quite cheaply in DIY stores.  

In winter, there is no need for the pump (it is turned off). In summer, the pump kicked in to keep up with high demand (eg. if the shower and tap on at the same time, or the automatic garden watering etc). 

I can't guess what kind of water storage your house will have, but it might be as simple as ours.

Thank you Kelvin your answer has helped alleviate some of my fears. 

All the best P

If you haven't got a mains water supply or sewerage, you'll have a septic tank which will need emptying periodically, and might not comply with current standards. Worse, the property might have a simple soak-away, which is illegal, and might cause problems in the future. Water brought in by tanker might be artesian water, and full of minerals, so possibly not suitable for drinking.

I'm not trying to put you off the property, but make sure you're fully aware of the situation before you commit yourself.