ROLLY FIRE WATER TANKROLLY Tanker Abbey ROLLY Tanker Abbey The Rolly Abbey Water Tanker or Slurry Tanker is a barrel trailer with twin axles. The tanker can be filled with tap water and then pumped out with the water sprayer. The water can also be drained from the tanker using a water spreader at the rear of the tank. Twin axle tanker with fully operational and removable hose pump. Open and close gate valve at rear of tanker. Suitable for all sizes of Rolly Pedal Tractors