Hi i got a main pipe bringing in water

You can convert pipe size to gallons per minute of flow by calculating the cross-sectional area of the pipe and making some reasonable assumptions about pipe volume and the rate of flow. Pipe sizing is measured by the internal diameter of the pipe, not the overall outside diameter. Once determined, the overall volume can be calculated. Pipe flow is described in gallons per minute. Shorter lengths of pipe will have a greater flow than a longer length of the same diameter. This is caused by internal resistance of the pipe itself. By the same reasoning a larger diameter pipe will have a greater flow or GPM than a smaller pipe at the same pressure or flow rate. Pressure is described as pounds per square inch. The square-inch measurement is determined by the area of the pipe. The pounds are the amount of force that is placed on the liquid to push it through the enclosed space.With that background, you can estimate the flow based on the pipe size.
Find the cross-section area of the pipe. Area is equal to pi times the radius squared or a = 3.14 x r2. A two-inch diameter pipe would have a cross-section area of 3.14 x 12 or 3.14 square inches.
Understand that water has a certain pressure associated with the height of that water. One pound of water pressure, or 1 PSI, is equal to 2.31 feet of elevation in height. In other words, a 1-inch column or pipe of water that is 2.31 feet high will have a pressure of 1 PSI. The overall height -- not volume -- of the pipe corresponds to the pressure. A 6-inch diameter pipe that is 2.31 feet high will only have 1 PSI.
Find the volume of the 2-inch diameter pipe in Step 1 that has a length of 10 feet. Ten feet is equal to 120 inches. Multiply 3.14 square inches, the cross sectional area, times the length. The volume of the pipe is equal to 376.8 cubic inches of volume.
Convert cubic inches into cubic feet. One cubic foot equals 1,728 cubic inches. Divide 376.8 cubic inches by 1,728 cubic inches per cubic foot and the answer is .218 cubic feet. This means that the 2-inch diameter pipe that is 10 feet long has an internal volume of .218 cubic feet.
Calculate the amount of water that can be contained in the section of pipe at any given time. One cubic foot of water is equal to 7.48 gallons. Multiply 7.48 gallons by .218 cubic feet and the amount of water in the pipe is equal to 1.63 gallons.
Find the GPM if the flow of water is one foot per second. Multiply the one-foot per second flow by 60 seconds per minute and the flow is now 60 feet per minute. In other words the water will flow through the 10-foot pipe six full volumes for every minute. Since the piping contains 1.63 gallons per 10 feet of pipe, multiply 1.63 by six and the final GPM is equal to 9.78 GPM of water flow from the 2-inch diameter pipe.

A total of 63 linear inches is 5 ft 3 in, or 5.25 linear ft.
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0.23 gallons. Figured out by assuming the pipe is .75 inches inside diameter. To get the volume, calculate the area of the cross-section with the formula Pi times the radius squared. Which is 0.375 squared times Pi = 0.441786. Multiply that times 12 inches per foot times 10 feet = 53 cubic inches. One gallon = 231 cubic inches.

look up inside diameter of your 2' pipe
area inside a circle = 3.1415 (pi) x radius squared
for example if inside diameter of pipe is 1.75", then radius is half or .875
radius squared is .7656 x 3.1415 = 2.4 square inches

160 feet pipe = 1920 inches
2.4 square inches x 1920 = 4618 cubic inches

Then convert cubic inches into gallons:
http://www.metric-conversions.org/volume/cubic-inches-to-gallons.htm

If water is hot, then that can affect final calculation

Gene

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

1) I believe you can immediately elbow the PVC pipe.
There is a limit for how many elbows can be used between blower and termination, and limit is determined by diameter of PVC pipe.

2) Copy following link for venting resources and typical Rheem and Richmond power vent manuals, and diameter-elbow pdf from Bradford White.
http://waterheatertimer.org/How-to-troubleshoot-gas-water-heater.html#venting

3) Richmond is Rheem. Product manual will show specifications for venting.
Product warranty is voided if installation does not follow specifications shown in manual.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

I don't know the answer to this ... your pool service company can advise you. To my way of thinking, you are asking a lot of a 3/4 horse. I have a 1 1/2 horse lifting water in a two inch pipe about 4 feet to my water feature with no reservoir.

Since you have a two inch pipe, why not run a bigger motor? I have two HP on all my filtered lines which are 2" suction and 2" discharge.

Are you absolutely sure you have suction? ... and no air leaks on the suction side?

sounds like it has a blockage may check inlet also

If the outlet of the discharge hose/pipe is

submerged you must have a 1/8" hole in the discharge
hose/pipe to prevent airlock. This hole must be open to air.

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/joseph_f4ed739f62995525

(1.5ft)^2 * Pi * 30 ft * 62.4 lbs/cu-ft = 13232.4 pounds plus the weight of the pipe which will vary depending on the material of the pipe.

You can find the weight of the pipe if you know the brand and material as most manufacturers will list the weight per foot in their catalog.
30 feet has about 11.94 cubic feet of whatever material the pipe is made of.

See this link:

http://www.consumerreports.org/cro/appliances/heating-cooling-and-air/water-heaters/tankless-water-heaters/overview/tankless-water-heaters-ov.htm

Then think about it

Norm, I expect you will find a one inch or three quarter inch pvc line running from the meter or pump to your house. If you dig fie feet fore and aft of the affected area you should have enough flexibility in the lines to make the repairs. Yoou will probably nee two to three slip by slip couplings and a tee and elbow of the appropriate size and a short length of pipe. It really depends on where the break is but more then likely it has occurred just behind the hub of the tee. You can possibly gain enough flexion in the lines to reduce parts cost but remember putting something in a state of stress already will greatly increase the possibility for future failure in the area again. Below is a picture of what I think you will find aand how I the repair will look.