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

hey guys,

Im trying to rehab an old system I inherited....and Im replacing a bunch of valves, and fixing a bunch of leaks. I wanted to gauge my PSI and flow rate, just to know what to expect in terms of performance when I fix everything back to where its supposed to be. My wife picked up a water pressure gauge for me at home depot, but damnit, its a cheapass orbit meter. The first time I hook it up, it fills with water...sigh....and I got readings varying from 80 to 96, all within 30 min, but the average was about 90 psi. So...dont know what to estimate for psi.

I went to the water meter, and haha...cant get it open, and the size of the meter isn't stamped on the box. Should I dynamite it open, or just estimate that its 5/8"? So.....also cant tell what size pipe is supplying the house, cuz I cant get in the meter. Theres no pipe visibly going into the house....the first pipe visible is coming out of the wall to the water softener in the garage, and its about 2 3/4-or 3 inches around...so this is a 3/4" copper line???

The Topper is when I tried to test he GPM. It took 35 seconds to fill a 5 gal. bucket. But, theres some kind of metal collar around the outside of the faucets outside the house. Stuck my finger in there, and theres a rubber nipple extending down from the faucet??? and the water is pretty aerated...so I dont know what the hell that is, and if thats restricting the flow, and giving me the horrible GPM estimate that Im getting which is like 8.5 GPM.



Frack...I couldnt have failed more miserably at this if I tried. Im going to start drinking heavily again.

HELP!

Quoted from "veidtmeister"

But, theres some kind of metal collar around the outside of the faucets outside the house. Stuck my finger in there, and theres a rubber nipple extending down from the faucet??? and the water is pretty aerated...so I dont know what the hell that is, and if thats restricting the flow, and giving me the horrible GPM estimate that Im getting which is like 8.5 GPM.

ok..so its a hose bib vacuum breaker....does that reduce flow rate??

I should probably mention, I live in Texas, and were in a HISTORICAL drought...but my pressure is good, so i dont get why Im only getting 8.5 GPM. Wonder if Im going to have enlarge the supply line to the house?

sorry, jumped the gun a little..



Ok...got the meter cover off, and its a "Badger 25", which from reading on the web means that the Water Meter is a 5/8" meter..like smallest there is..right?

Uncovered the pipe, and it looks like steel or galvanized pipe, and is 3 1/4" in circumference, so its...what....3/4" pipe, supply to the house!!

Crap! These are like the minimums of both....

My house is 3000 sq. ft, w/ 2 1/2 baths, dishwasher, laundry, water softener, and a sprinkler system....and I have the absolute crappiest supply........great................no wonder Im getting 8.5 GPM.



Whats the chance of getting the water co. to install a larger meter? And what the hell do I do about the supply line to the house? Anything after the meter is my responsibility, right? Can I just call out a plumber and have them do it? I have no clue.



And if so...how big is "too big"...ie...what would y'all suggest to prevent too much scrubbing and water hammer etc...(although, I probably shouldnt worry about that at this point)

Im not 100% sure its galvanized, it was dusk, and it was covered with dirt. Could it be steel? I'll check tomorrow. But how would one know its restricted, except to cut it out and replace it? And what size/type of supply line would you replace it with...on a 5/8" water meter? I am pretty sure about the pressure readings, but I'll try it at different times, and on different days. As far as the line I took the pressure readings from, they are just typical outside faucets? Not sure what size, guess I can check that tomorrow...but if they are 1/2", how would that affect the overall issue? Sorry for so many questions, Im a newb at this, learning as I go. Im looking at the diagram of my system, and the "mainline" that runs through the yard is 1 1/4", which then branches out to 3/4, and finally down to 1/2" pvc....

Im amazed that a 3/4" supply line coming from the main can supply all of these lines....although...its not doing that great of a job....so...yeah....

I guess im just surpised its standard, when everything I seem to read online says that a 1" supply line is the current minimum, and all of the "do it yourself" sprinkler system design websites show systems running at like 15 GPM, and if you have less than 7 GPM, they dont offer their service, and say to "call them for other options"...

Can I realistically run a system on 8.5 GPM??