Posiflo Water Pumps 12v 7ltr 16psi. Of all the appliances in your Caravan, Motorhome, RV or Boat, the water pump is one of the most important. Fresh, pure portable water at the turn of a tap, just like home, is essential for your holiday and the Posiflo range delivers unique advantages. Fresh, pure portable water at the turn of a tap, just like home, is essential for your holiday and the Posiflo range delivers unique advantages in Reliability, Design, Engineering, Performance and Quality. Warrenty included as new item, delivered in 1 - 4 days.