Washing machine, comprising: - a tank mounted inside a frame fitted with dampers, - several ballast reservoirs arranged to contain water and provided on the exterior wall of the tank, - said tank being moulded from a synthetic material and the ballast reservoirs, empty fabricated, being molded with the tank to form a monoblock assembly, - the capacity of said reservoirs being equal to the maximum level or quantity of rinsing water contained in the bottom part of the tank for this opération, - a water supply circuit of the tank, in order to supply said reservoirs serially supplied by an opening with water, via at least an overflow opening, via at least an opening, by gravity, and at least an opening enabling, via means to return the water of the tank to said reservoirs or means to empty the tank and discharge wastewater to a sanitary installation, - the tank being surely or possibly supplied by mains waters and/or by the ballast reservoirs fed by the tank via the at least one opening and the return means, or indirectly through a product container or like, via the overflow opening or the opening by gravity characterized in that said machine comprises bridges molded with the exterior wall of the tank and arranged to wrap up solid ballast materials as concrete or aggregates and in that the ballast reservoirs arranged at the top of the tank are provided with filling and emptying means and with a compression chamber to act as electrical contacts of a pressurestat, automatically showing the programming and controlling the heights or quantities of water in reservoirs at the top of the tank and the programming of at least one water supply of the tank by gravity. - a tank mounted inside a frame fitted with dampers, - several ballast reservoirs arranged to contain water and provided on the exterior wall of the tank, - said tank being moulded from a synthetic material and the ballast reservoirs, empty fabricated, being molded with the tank to form a monoblock assembly, - the capacity of said reservoirs being equal to the maximum level or quantity of rinsing water contained in the bottom part of the tank for this opération, - a water supply circuit of the tank, in order to supply said reservoirs serially supplied by an opening with water, via at least an overflow opening, via at least an opening, by gravity, and at least an opening enabling, via means to return the water of the tank to said reservoirs or means to empty the tank and discharge wastewater to a sanitary installation, - the tank being surely or possibly supplied by mains waters and/or by the ballast reservoirs fed by the tank via the at least one opening and the return means, or indirectly through a product container or like, via the overflow opening or the opening by gravity characterized in that said machine comprises bridges molded with the exterior wall of the tank and arranged to wrap up solid ballast materials as concrete or aggregates and in that the ballast reservoirs arranged at the top of the tank are provided with filling and emptying means and with a compression chamber to act as electrical contacts of a pressurestat, automatically showing the programming and controlling the heights or quantities of water in reservoirs at the top of the tank and the programming of at least one water supply of the tank by gravity.