The converse is also true. If the OP intends to lay the pipe himself and he can stand to push a shovel for however many hours it takes, then the only cash costs are the materials.
You realize you have to be below the frost line. In my state that averages 58". And you talk about doing this with a shovel for 650 feet? OP what is the frost line where you are living? I think most of us would rent a trencher if we don’t hire it out.
Gentlemen,
Yes, I will use a trench shovel.
I only intend gravity to get water to my tank.
My only unknown is laminar friction loss from 650’ of pipe. If 1" is fine to merely get it there, that is fine.
What’s a “frost line” … hahahaha … but okay, point taken … I guess the ground freezing here where I live is an every 25 years or so, that one time was only about an inch … but I’ve lived in Iowa, everything gets buried four feet …
And yeah … a simple shovel is a scary thing … and 650’ is damn near an entire furlong … so rent the trencher and pay for the added pipe diameter … in Northern Minnesota, LSLGuy’s advice is good advice …
You keep asking without providing the needed data to answer the question. In order to calculate friction loss we need to know at what rate you need water to come out. It’s impossible to calculate friction loss without gallons per minute.
At 5gpm the 1 inch can handle 5gpm across 650ft w/10feet of head. If you want more than 5gpm you’ll need larger pipe.
When it comes to materials HDPE is my preferred. 1inch HDPE is relatively cheap. When you go up in size with HDPE it’s more of an exponential price increase. You’ll see HDPE in IPS and in CTS. CTS is copper tubing size, it’s both more restrictive(volume) and more expensive. You’re going to have an issue as it’s not sold in 700ft lengths. It’s sold in increments of 100ft till 600ft then it jumps to 1000ft. So 1 joint(a 600ft and a 100ft) or handle difficult large coil and have 350ft of extra. If you go larger than 1" it becomes even harder to handle. I stock 600ft coils of 1 1/4 250psi, we refer to them as man killers.
PVC is cheap and not all that difficult to deal with. It has a more linear price progression so if you want larger diameter it may be a better option for you.
Personally in a non-freezing climate where you are only burying it a foot of so I’d go with 2" bell end PVC.
Looking at your question, I think you should do some more research before proceeding. Here are some considerations :
- Pipe diameter:
For a 1 inch DR 9 Pipe, I get a flow of around 7.5 GPM. Someone else did the calc for steel pipe which has higher friction. This gives a velocity of 3 ft/s which is well below the max recommended 5 ft/s.
If you go with a higher diameter pipe, your fluid velocity is lower - and although you will get more flow, you will get higher silt deposit in the pipe too. You do not describe the water quality and what kind of inlet filtration you are having, so I’d say 1 inch sounds good.
Also, hope your run is smoothly downhill; if not - you will run into air pockets issues. The air pockets issue is more probable with higher dia piping. I hope you are considering a valve and at least one air vent in the pipe to get rid of the pockets.
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You’d need sediment removing sections every some feet (or where the gradient changes to flat) to remove sediments . This can be a 2 inch pipe segment, with a removable plug on one end and two tees - one for the incoming and one for the outgoing and the 2 inch section will be vertical. The size of this segment will depend on how much sediments are there in the water.
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Please also think about diversion valves every hundred feet or so - that allows you to clean the pipe. Effectively think about having the ability to run water independently in every 100ft or so of pipe - so you can clean one section at a time, if things clog up.
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Your choice of HDPE is good. Its freeze resistant and you can join them when wet.
Good luck
Also - invest more on the holding tank. Have a storage capacity for a week to a few weeks.
I know beans about this stuff. Care to expand on this explanation a bit?
I’m not seeing how a single vertical section and two tees go together in an otherwise straight line of 1" diameter pipe. Is “2 inch” referring to diameter or to length?
I am not a good drawing person but I tried something. See if this makes sense :
Also - the sediment catcher will go on the horizontal runs of the pipe like shown on the picture :
You may need bigger than 2 inch pipe depending on the sediments in the water and the drop leg may need to be bigger depending on frequency of cleanup.
Perfect explanation. Thank you. Obvious once you see it. Not so much beforehand.
Thank you, all, Gentlemen.