WE ARE BUILDING A VILLA IN SPAIN AND WE HAVE NO MAINS WATER. WE WILL USE 4 X 1000 LITRE CUBES AND HAVE OUR WATER DELIVERED. wE HAVE A PRESURIZATION UNIT TO INSTALL AND WE WOULD LIKE TO KNOW HOW BEST TO DO THIS. WE HAVE 4 ON-SUITES EACH COMPRISSING OF A SHOWER, TOILET AND HAND BASIN. OUR KITCHEN...