On Sunday, August 3, 2014 2:18:02 PM UTC-5, Michael Wilson wrote:
On Sunday, August 3, 2014 2:05:25 PM UTC-5, dpb wrote:

On 08/03/2014 1:18 PM, Michael Wilson wrote:



...







I'm out of my element here. I see a pressure gauge from the line



running from the tank to the house. And when the pressure switch



kicks in at 52. I guess I'm looking at the wrong gauge. The pressure



tank was delivered with 35psi. If I just leave it, will I be ok?



Thanks.







Not if that pressure indicator is at all accurate, no.







If the system is empty/open, does the gauge then read zero or is it way



out of whack, maybe? Take it off and be sure it does zero out. Also be



sure the feed tubing to it is clean of rust, etc., so it it gets a fair



view of actual pressure.







Here's at least a reasonably-arranged installation if not pretty--the



well feed would be from the rear, the outlet to the house on this side.







http://inspectapedia.com/water/Two_Harbors_2011_0420_DJFs.jpg







It needs to be pretty close proximity to the tank; if it's too far away



you're reading pressure wherever it is in the system which depending on



pipe sizing, etc., can be quite a bit different.







The bladder/diaphragm in the pressure tank is precisely size to the size



of the tank and the pressure differential between on and off and that 2



psi difference between it's dead pressure and the cut-in pressure. It



moves from fully up to fully extended where it is just at the top of the



outlet when reaching the cut-in pressure--too high and you don't get



much of the tank volume, too low and the bladder will actually extend to



the point it'll cut off the outlet by stretching too far.







You do need to get this right and if you don't have the skill set to get



it set up correctly, spend the bucks and get somebody out to do it



correctly--you'll save money in the long run by not screwing up



something more expensive to fix.







http://www.sprinklers4irrigation.com/en-us/pg_75.html







At least a minimum description.







Unlike Harry K, I'd say the 30-50 is by _far_ the most prevalent setting



I've ever encountered; we run 20-40 here on the farm and have been



content for 50+ years; run the house plus all the animal waterers (up to



1500 head worth) plus the lawn/garden (altho use the traveling



sprinklers rather than impulse sprinkler heads) and never have pressure



issues.







But, I wouldn't quibble with either altho I personally think 60 is too



high for household internal use for the aforementioned reasons.







--



Thanks for the help! The tank is off and the pressure gauge that is visible still reads 52. The switch is set for on at 40 and off at 60. Should I inflate the new tank to 40? Should I change out the gauge?



Much appreciated help on a Sunday afternoon!

Also, is there a standard size for the fitting of the PVC into the tank itself? It's a Flotec FP7120. I can't find anything in the owner's manual or on the mfg web page. Thanks.