Septic Tank Emptying Langford, Stevenage - Welcome to the Langford Septic Tank Emptying Directory listing recommended septic tank emptying companies in Langford. It lists those who offer septic tank emptying services and septic tank emptying in Langford, Stevenage. Do you have a Langford business? If so, why not advertise it on the Langford Business Directory - IT'S FREE.