1). Water Stopcock.You should know the location of and check the operation of this particular valve i.e. on and off and if it is sluggish either way or will not turn then call the water supply company. Bounds Green Plumbers are a professional service.2). Main Internal Stopcock.Usually under the sink, again check operation of both open and close positions and make sure water flow is good. If any problems occur it should be replaced.3). Pipes.Visually inspect all accessible copper pies and if there is green verdigris and dots of dampness they should be replaced.4). Taps.Do they drip? If there are stains down the bath or sinks, new washers should probably be replaced.5). Toilets.Remove the lid of the WC cistern. Operate the flush and observe the system empty and fill. Any problems or juddery movement or odd noises means the need for adjustment and overhaul.6). Inspection Covers.Open any inspection covers on your property and inspect for crumbling concrete, debris or sludge in the gullies, holes and traps. These should be clean.7). Cesspits and Septic tanks. If you have one, check for unpleasant smells or soft ground surrounding the covers.8). Drains.Again visually inspect all drainage looking for damage. If they are pottery you should consider plastic replacements.9). Cold Water Storage Tank.This should have close fitting lid. Get help to run off some water and watch the re fill operation and cut off. Check level is lower than overflow. Any drips from valves etc need replacing.10). Floors.Check all floors behind toilets, under sinks, in the hot water cylinder cupboard in fact anywhere water is running over and look for rusty and or wet patches. Any problems always consult an expert like a Bounds Green Plumber .