I have built my own spray rig to water some stock and tanks and a garden. It is a 330 gallon tank and has a spout at the bottom that i am going to connect a multi purpose pump to. My question is what size pump would i need? I have been looking at Atwoods and Tractor Supply and have seen some 2.1 GPM and a 5 GPM pumps i just don't know which would best suit me. i am planning on having the tank on the trailor and running water hose to a sprinkler or two. I would like to know how man sprinklers are possible on this type of system and still keep good pressure. Thanks for any answers.
It all depends on the size hose you will be using. Anything under a 1 inch will not work well. The pumps you listed are not going to do the job. I can pee more than 5 gals in a minute...lol You need to look into pool pumps and a 3/4hp might do. You will have to reduse from 1 1/2 in to the one inch. Just don't use under one inch. Good luck!
Like the last person, what you've looked at won't do much. Just think of a 5 gal bucket and how fast do you want to fill it up. Also you want pressure behind this water if you want to water with it, so look at the psi on a pump as well as the GMP to determine what will work best for you. I'd say 40psi should be enough pressure to run hoses and sprinklers and remember that the smaller the hose at the end gives the highest pressures. Hope this helps you out some. I'll admit, I'm thinking of this as knowledge of water pressures more than GMP, but I think I've explained something good about your question. Good LUCK
