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Hidropur
Honduras
799 Posts |
 Posted - 03/28/2005 : 16:21:41
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Hi Woodie,
You need to determine the following to select the ideal pump:
1) Static Head in feet (How many feet from the pump to the highest point of discharge)
2) Dynamic head (How many feet to the farthest and highest point of discharge, plus the the pressure drop created by the friction of the water against the pipe walls and pipe fittings, plus enough backpressure to insure proper discharge flow at the taps (usually 20 PSI backpressure at the farthest point))
3) Flow capacity (How many open fixtures at the same time added up given each individual fixture's max flow). You said bedrooms, not bathrooms. What about jacuzzi, pool, etc.
With these parameters you go to the pump distributor (if you're doing this for the first time make sure it's a knowledgeable person willing to sit with you and walk you through the selection process)and pick a submersible with an "efficiency curve" that will allow you the best performance. The grafical convergence of #2 and #3 within a certain electrical efficiency will determine the "ideal*" pump head, and HP's needed to drive it. This in turn will determine your wire size vis-a-vis distance and voltage. If you have 230 3-PH you'll save on your electric bill. You'll need special waterproof electrical tape. Ask the salesperson. Do get a 120 Gal. blader or diaphragm pressure tank for best performance.
You'll need:
1) A quality 1" check valve installed downstream from the pressure tank into the house.
2) A pressure switch with settings recommended by the pump seller (20/40; 30/50; or 40/60).
3) Lightning arrestor, control box, relay switches, low level electrodes, etc.
Hope this helps,
David Maradiaga
* There can be several "ideal" choices given many variables.
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jet pump to submersable
