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Pumps, Wells, Tanks, Controls / Re: CSV pressure question

« on: March 21, 2013, 07:08:56 PM »

So, my well pump draws 8.40 Amps at 245 Volts.  It's a dual pole, I tested voltage at the switch when it was running to get an accurate read, and yes it is on a dual pole breaker so high voltage single phase pump.  The pump gives me 7.5 GPM, I tested by running water till pump turned on then closing water.  Timing how long it took for the pump to turn off (56 seconds), then drew water till it turned back on (got 7 gallons).  So 7 / 56 x 60 = 7.5 GPM.

btw, at 8.4 amps and 245 volts I get a wattage draw of 2058, which gives me a 2-3/4 HP pump (746 watts/hp).  Not sure if they sell fractional water pumps like that?  Might be an under worked 3 hp?

The pipe that comes out of the wall into the basement has no markings on it.  But it is hard plastic, black, 1" internal diameter, 1-1/8" external diameter.

Have no idea on the exact well depth and water level.  I didn't receive that information when I purchased the home and don't know how to find out without pulling the well pump out and measuring, which I'm not about to do.

2

Pumps, Wells, Tanks, Controls / CSV pressure question

« on: March 19, 2013, 09:11:40 PM »

Hello, someone recommend CSV to me as something I might possibly want to install on my plumbing system.  But I had a question, that's not really answered on the site that I could find or a glimpse at the current topics.

Say I install a CSV valve, by my understanding is restricts flow rate to what you are using at a minimum of 1 GPM.

Now say I want to water my garden, and I open the valve to let out exactly 1 GPM.  My well pump has a pumping speed of 7.5 GPM, but is limited by the CSV to 1 GPM.  Will it not build pressure on the pre-CSV side of the pump?  The pump is a submersible and is very deep, so has a flexible hose.  Does the CSV have a built in pressure relief?  What if I run my hose for an hour, what is the maximum possible pressure that the CSV will allow to build up on the well side?  I don't know the pressure rating of the hoses underground, but I assume they max at 125 psi.  What is the risk of over-pressure, and what if any counter measures are built in the CSV?

Please note, I'm not a plumber, but have a working knowledge of plumbing.  I purchased the house with the pump already installed, so have no idea of the brand or model since I could not find any documentation for it in the house.  And I'm not about to pull 400+ feet of hose out of the ground to check the model on the pump unless it breaks down first.  If I knew the model I could figure out the pumps max pressure at the depth it is, but I can't for all I know it could put out 125 psi or more.