Ask Experts Questions for FREE Help !
Ask
    nhsherr's Avatar
    nhsherr Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Jun 29, 2011, 10:44 AM
    What's the standard water pressure in an 86-gal pressure tank?
    Well water; 86-gallon pressure tank (installed in 2009); using a Rinnai tankless water heater.
    massplumber2008's Avatar
    massplumber2008 Posts: 12,832, Reputation: 1212
    Senior Plumbing Expert
    		  
    #2

    Jun 29, 2011, 11:04 AM

    Hi Nhsherr...

    Standard water pressure is between 40-60 PSI, but every system is different.

    To determine your pressure go out to a home supply store and purchase a hose bib pressure gauge (see image) and use it on an outside faucet.

    You'll have an exact answer after that, OK?

    Back to you...

    Mark
    Attached Images
      
    mygirlsdad77's Avatar
    mygirlsdad77 Posts: 5,713, Reputation: 339
    Plumbing Expert
    		  
    #3

    Jun 29, 2011, 05:23 PM

    Just to clear this up, are you asking about water pressure, or the precharge pressure in the pressure tank? If you are asking about precharge (air pressure) in the tank, it is the same for any size tank on a well system. Air pressure in the tank should be set at 2 psi below pump cut in. Make sure to measure the pressure with pump off and all water pressure drained from the system. So, if your pump cuts in at 40, you should set the precharge of the tank at 38. Hope this helps, and if I misread your question, just let me know and I will try to help further.
Not your question? Ask your question View similar questions
 

Question Tools Search this Question
Search this Question:

Advanced Search

Add your answer here.


Check out some similar questions!

How long does it take to regain pressure in water pressure tank. [ 1 Answers ]

How long should it take for my pressure tank to regain pressure from 30 psi to 50 psi. We just replaced the pressure switch, which went bad and killed the main breaker in my home, but I'm concerned because it seems to take a long time to re-up to max pressure. ( roughly 2 minutes ). I seem to...

New shallow well pump new huge pressure tank but water pressure is terrible [ 11 Answers ]

When I had a smaller pump (shallow well) and small tank my water pressure was great. When I had to replace everything the person installing the system put a bigger pump and a huge pressure tank. It is the size of a 50 gal water heater. I replaced everything. Ever since then my water pressure is...

Having problems with a 19 gal flotec pressure tank [ 12 Answers ]

I installed a Flotec Pressure Tank in my resident cause the previous tank corroded and start leaking, so I went to Home Depot bought it, installed it. Went by the instruction but the pump that feeds water to the tank won't shut off. I set the PSI at 18 all the way to 25 and I'm still having the...

Does the pressure from the hot water tank effect the pressure of the cold water? [ 2 Answers ]

We have very low water pressure at our kitchen sink from both the cold and hot water faucets, but no problem with the water pressure to the bathroom or washer. The cold water tank is closest to the kitchen and the hot water heater is near the bathroom and washer. Someone told my roommate that there...

30 gal well pressure tank not keeping a charge. [ 1 Answers ]

House is at 9000 elev. In Colorado. Tenant says he can do something to make the pressure tank keep a charge for about month at a time. Tank is orig to house built 1995. 1. I have an estimate for replacing everything, but wonder can I just replace the full fitting kit and see if the tank works...

View more questions Search