Water heater, in particular a storage water heater, comprising at least: - at least one storage tank adapted to contain the volume of water to be heated. - a containment housing, adapted to incorporate and protect said at least one tank, comprising a shell closed above by an upper cap and below by a lower cap, - a layer of insulating material, injected at the liquid state in the plenum comprised between the outer surface of said at least one tank and the inner surface of said housing and capable of expanding and stiffening in a solid state, - gripping means for the handling of said water heater, characterised in that said gripping means are integrated with said upper cap by means of reciprocal coupling means (24, 25, 34, 44), characterized in that said gripping means comprise: - a pair of handles, each of which is: - located above said upper cap, - provided with coupling means (24, 25) with reciprocal coupling means obtained in said upper cap; - a pair of counter-handles, each of which is: - located below said upper cap, - provided with coupling means with said reciprocal coupling means obtained in said upper cap; - constraint means for said reciprocal coupling means (24, 25, 34, 44) of said upper cap and of said pairs of handles and counter-handles; said pair of counter-handles being incorporated in said insulating material following its transition from the liquid to the solid state. - at least one storage tank adapted to contain the volume of water to be heated. - a containment housing, adapted to incorporate and protect said at least one tank, comprising a shell closed above by an upper cap and below by a lower cap, - a layer of insulating material, injected at the liquid state in the plenum comprised between the outer surface of said at least one tank and the inner surface of said housing and capable of expanding and stiffening in a solid state, - gripping means for the handling of said water heater, said gripping means are integrated with said upper cap by means of reciprocal coupling means (24, 25, 34, 44), characterized in that said gripping means comprise: - a pair of handles, each of which is: - located above said upper cap, - provided with coupling means (24, 25) with reciprocal coupling means obtained in said upper cap; - a pair of counter-handles, each of which is: - located below said upper cap, - provided with coupling means with said reciprocal coupling means obtained in said upper cap; - constraint means for said reciprocal coupling means (24, 25, 34, 44) of said upper cap and of said pairs of handles and counter-handles; - a pair of handles, each of which is: - located above said upper cap, - provided with coupling means (24, 25) with reciprocal coupling means obtained in said upper cap; - located above said upper cap, - provided with coupling means (24, 25) with reciprocal coupling means obtained in said upper cap; - a pair of counter-handles, each of which is: - located below said upper cap, - provided with coupling means with said reciprocal coupling means obtained in said upper cap; - located below said upper cap, - provided with coupling means with said reciprocal coupling means obtained in said upper cap; - constraint means for said reciprocal coupling means (24, 25, 34, 44) of said upper cap and of said pairs of handles and counter-handles; said pair of counter-handles being incorporated in said insulating material following its transition from the liquid to the solid state.