Shortly after 0730 hrs. a Mutual Aid Request was placed for TANKER 5 to respond on the WATER SUPPLY TASK FORCE ALARM for a HOUSE ON FIRE in Laytonsville. TANKER 5 responded quickly and supplied units on the scene with three loads of water before being placed in service. Also on the Alarm was Lisbon ENGINE Co. 41 who filled the tanker from an in-ground cistern tank near the incident. COMPANY 5 responded on additional incidents while the Tanker was gone.