APPARATUS TO PRESSURISE MAINS WATER SUPPLY

摘要

The invention relates to apparatus for pressurising mains water supply to a water delivery pipe system comprising: a) a water inlet (2) for connection to a mains water supply; b) a water outlet (3) for connection to a water delivery pipe system; c) a first non return valve (4) and a pressure limiting valve (5) in series between the water inlet (2) and water outlet (3); and d) a loop (10) for pressurising the water comprising: i) a loop (10A) inlet connected between the water inlet (2) and first non return valve (4); ii) a loop outlet (10A) connected between the first non return valve (4) and the pressure limiting valve (5); iii) a second non return valve (11) connected in series to a pump (12), and an expansion vessel (15); in use water at mains pressure enters the water inlet ("), the water is pressurised by the pump (12) and a positive pressure develops across the pressure limiting valve (5) and the pressurised water is delivered to the water outlet (3) at a pressure which exceeds the mains water supply pressure.