as above any pump like taht will do you, if you buy a decent pump like that one you wont go far wrong and they are well up for the job 65 or 100 psi in my experience both will work through 100 meters of microbore, my advice would be keep the backpack as well strapped to a sack barrow or however you are currently using it, trust me i bet you will use it at least once everyday :-) my pump is a flowjet 65 psi and its the only pump i have ever had, never had a problem with it and i spill water over it everday lol