Ask Experts Questions for FREE Help !
Ask
    BIG-D's Avatar
    BIG-D Posts: 5, Reputation: 1
    New Member
    		  
    #1

    Sep 17, 2009, 04:24 PM
    FORMULA for getting elevations
    A waste pipe is graded at 2.5 persent. It begins a 29 foot run at an elevation of 81.5 feet and ends at a waste holding tank. What will the elevation of the pipe be at the holding tank? Dose anyone have a formula for this qustion? Please help!
    BIG-D
    ballengerb1's Avatar
    ballengerb1 Posts: 27,378, Reputation: 2280
    Home Repair & Remodeling Expert
    		  
    #2

    Sep 17, 2009, 05:51 PM

    Depending on the size of the waste pipe it should drop 1/4" per foot so about 7.25" unless 4" pipe or larger. I am not sure what you mean by "graded at 2.5 persent" can you explain that a bit more
    mygirlsdad77's Avatar
    mygirlsdad77 Posts: 5,713, Reputation: 339
    Plumbing Expert
    		  
    #3

    Sep 17, 2009, 06:24 PM

    As Bob explained, you need 1/4 inch drop per foot for three inch or smaller piping. IF you have four inch or larger pipe, it can be graded at 1/8 inch per foot.

    Formula for three inch or smaller pipe.

    length of run=29 feet.
    required sloap=1/4 inch per foot, or .25 percent.

    29x.25=7.25.

    7.25 is the drop from point A to point B(holding tank)

    So, Point A is 81.5 feet.

    Point B=A(81.5 feet) -7.25 feet.

    B-A = 74.25 feet.

    74.25 feet would be the logical elevation of your inlet to septic or holding tank. Hope this helps. I know it hurt my brain.

    Now, tell us what your up to and maybe we can give you some better answers.
    BIG-D's Avatar
    BIG-D Posts: 5, Reputation: 1
    New Member
    		  
    #4

    Sep 18, 2009, 03:59 PM

    Thank you for the help, It was a question I had from trade school, I was not putting in the pipe or tank.
    mygirlsdad77's Avatar
    mygirlsdad77 Posts: 5,713, Reputation: 339
    Plumbing Expert
    		  
    #5

    Sep 18, 2009, 05:21 PM

    Okay.
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!

Balance the formula with equations,formula,balancing and form [ 2 Answers ]

When silver nitrate solution combine with calcium chloride solution,white precipitate of silver nitrate was formed in calcium nitrate solution

Anti-siphon valves at different elevations [ 5 Answers ]

(this has been moved by me from another thread here) If you have 2 valves in different places at different elevations, is it true that each valve only needs to be higher than the highest sprinkler that it services? I would like to split the supply line and service 2 different areas. Its...

How to put this in a formula [ 1 Answers ]

This is what I have so far: 0.2*W + 0.6*J = 0.44*x Wilson High School has 400 students, of whom 20% are African American. The school board plans to merge Wilson High with Jefferson High. This one school will then have a student population that is 44% African American. If Jefferson currently has...

Do I use the P=2l+2w with another formula [ 1 Answers ]

An indoor physical-fitness room consists of a rectangular region with a semicircle on each end . The perimeter of the room is to be a 200-meter running track. What measurements will produce a maximum area of the rectangle?

View more questions Search