On Mon, 8 Nov 2010 06:57:41 -0700 Craig <diese...@pisquared.net> wrote:
> I have seen well points like Mitch posted in Grainger's catalog. > Interesting concept if you can use it. It says it's for water tables of > 25' or less. I just realized why the well point Mitch posted is for water tables of 25' or less! If you use a single down-pipe, you can get water only by sucking on the top end of the pipe. Atmospheric pressure limits that to 32' (if you try it any deeper, all you will get at the top end of the pipe is a partial vacuum and water vapor). The limit of 25' is to allow for pipe pressure losses. For wells with water tables more than 25' down, you have two choices: 1. You use a two down-pipe arrangement with a pump that pumps water down one pipe and uses that to "blow" water up the second. IIRC, they are called injector setups. They have a maximum depth, but I don't recall what it is. 2. You put the pump at the bottom of the down-pipe. This is useful to essentially unlimited depths. This was what we used on our 523' well, what some friends used on their 1100' well, and what the town of Calhan, Colorado, used on their 1800' well. Craig _______________________________________ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
