Proton pump that utilizes the energy of pyrophosphate hydrolysis as the driving force for proton movement across the membrane. Generates a proton motive force. diphosphate + H(+)(in) + H2O = 2 H(+)(out) + 2 phosphate Optimum temperature is 80 degrees Celsius. Homodimer. Belongs to the H(+)-translocating pyrophosphatase (TC 3.A.10) family. K(+)-insensitive subfamily.