The volume of the pipe is 0.2078 gallon per foot of length.
I have no idea how much water might be in it.
There need no be any water at all! The capacity of the pipe is 8.11 litres approx.
6.5 gallons, if it is full of water. (if this is a trick question, and the pipe is empty or full of dirt or something, then not 6.5 gallons)
The radius is half of the 4 inch diameter. Therefore, the radius is 2 inches.
Pipe with a Nominal Bore of 4 inch (100mm) Outside Diameter 114.3mm
2 1/4 inch is 9/4 inch long pieces, so if pipe is 36 in long then 36/divided by 9/4 is 36 times 4/9 = 16 pieces
The volume of water in a 4-inch diameter, 1-foot section of pipe is 0.6528 gallons of water.
100
The volume of the pipe is (pi) x (radius)2 x (length)= (pi) x (2)2 x (120)= 1,507.964 cubic inches = 6.528 gallons (rounded). I have no way of knowing how much water may be in it.
A standard water line PVC pipe typically has a width (diameter) of either 1/2 inch, 3/4 inch, 1 inch, or 1.5 inches.
The volume of this pipe is 261.8 cubic feet.
By calculating the areas of circles with diameters 6 and 4 and comparing those: pi3^2=pi9 pi2^2=pi4 pi9/pi4=9/4=2.25 So the 6 inch pipe holds 2.25 times as much as the 4 inch pipe.
111 gallons of water.
There need no be any water at all! The capacity of the pipe is 8.11 litres approx.
The recommended diameter for a 2-inch drainage pipe to effectively manage water flow is typically around 4 inches.
6.5 US gallons of water.
That's 3/4" pipe, not 3.4" prehaps it would deliver more pressure through the 1/2 inch pipe than 3/4 inch. 3/4" pipe will be less restrictive over the course of the run. Otherwise, no. 1/2" Copper Pipe will do fine, since it has a smoother bore, less restrictive, no lime and rust build-up. The only reason for you to use 3/4" pipe is if you want more volume. The pressure remains the same.
The size of sprinkler pipe you should use for your irrigation system depends on the water flow and pressure needed. Generally, a 1-inch pipe is recommended for larger systems or areas with high water demand, while a 3/4-inch pipe is suitable for smaller systems or areas with lower water demand. It is important to consider factors such as water pressure, flow rate, and the number of sprinkler heads when choosing the pipe size for your irrigation system.