Abstract: Installation for biodiesel production includes a support structure (5); a tough body or filling (6); a set of vessels fitted or formed in the filling of the support structure (5) or tough body (6); a reactor circuit which includes the supply of the reagents from at least one pumping device through a first set of heat exchangers (2), a second set of heat exchangers (3) and/or a set of reaction units (4); and a heat-insulating filler (7) fitted between items (2, 3, 4) constituting the reactor and the vessels formed in the structural filling of the structure. A pumping device with a piston is placed inside the recipient from which the product to be pumped is taken.