SPRINKLER TALK FORUM - You Got Questions, We've Got Answers

sizing up the pipe will never make less psi. put a psi gauge on different sized pipes from the same water supply and it will read the same. try using a different sprayer. try actually increasing the pressure as well. 25 psi is incredibly weak and the seal may not be sealing properly. anyway, your last reply is backwards.

lush96 stated "psi will always remain the same" - you ought to clarify that you are talking about static psi.....

lush96, i never stated that "sizing the pipe down will increase the flow", of course it will decrease it, not sure where you read that, it will however increase the velocity!

I think Tom just got FPS (feet per second) mixed up with GPM... easy mistake

so according to tom, if you were working with a 2 inch main......sizing the pipe down to as small as you can get it will increase flow. hmmmmmmmmmmmmm. makes me wonder why big pipe is used with big mains such as in commercial applications. hey tom, try sizing the pipe down on a 2 inch main and i will keep mine 2 inch. I GUARANTEE you that i will be able to put more heads on a zone. try another profession.

just do the tests i said, and you will see that i am right. charts and the like never compare to real life experience. psi will always remain the same. velocity and flow are 2 totally different things. AGAIN.......do the five gallon bucket test i said above. this guy needs more hands on experience and common sense. i am right.....he is wrong. next

lush96 stated, " sizing up the pipe NEVER slows the flow down. it increases it "

Not too sure what you mean by that statement. Look in a catalog with friction loss charts........... sizing up pipe always decreases the velocity and psi loss for a given gpm.

sizing up the pipe NEVER slows the flow down. it increases it. but the flow is only as strong as the water supply size. if you have half inch supply and size up or down you are still getting half inch flow. this is the source. when using small pipe the stream of water shooting out furthur does not in any way mean there is more flow. flow is measured in gallons per minute. do this test to prove the validity of this. using the same water supply, time how long it takes to fill up a bucket with half inch hose. now time it with a bigger size. the bigger size will ALWAYS win. more flow. as far as psi.......sizing up the pipe will never make less psi. put a psi gauge on different sized pipes from the same water supply and it will read the same. try using a different sprayer. try actually increasing the pressure as well. 25 psi is incredibly weak and the seal may not be sealing properly. anyway, your last reply is backwards.

size up the pipe it will slow down the flow and make less psi-

1/4 Tubing? You need a 10 or 15 psi regulator. 25 is to much pressure for 1/4 micro tube.

More sprayers? I am not sure.