Connecting Water Pumps

are these pumps to run simultaneously, if yes, check the deep well pump supply. If capacity at delivery condition of the 2 pumps(check the h-q diagram) equals the deep well pump, you're good, otherwise, just make sure these two pumps don't run at the same time.

the pumps don't run at the same time,anyway thanks rmq21,is there any device or mechanisms that will be connected to the suction pipe of each pump so that the pressure tank of the idle water pump won't be destroy by the vacuum caused by other pump that is working.

hi rambo,

..all you need is a few properly placed non-return/one-way valves(i.e.: into the pressure tanks). Perhaps if you could provide a sketch on the intended arrangement...

We run a hatchery with a 450 ft deep well. Well casing is 8 inch. We run (2) 5 hp 600volt deep well pumps, 4 inch diameter in the same casing. They are set at about 250 ft with 20 ft difference in depth. Flow is 80 gal / min each 24/7/365 days per year. Each pump has its own foot valve. There is minimum 35 ft of water above highest pump to prevent cavitation. Both run into a common disribution tank and then gravity feed to the rest of the process.

Extreme care must be taken when pulling pumps that you don't jar one and drop it the rest of the way down the hole. (Yes, we did that. Quite a trick to fish out a pump 450 ft down the hole!)

Only problem with 24/7 operation is the aquifier slowly plugs up, and every few years we have to surge the well. A day or two of muddy water and all is back to normal.

I had a well project at a recreation camp. The users were adding more hookups at the camp. The State mandates a set gpm per hookup. I wondered if I could put in a bigger pump (5 to 7-1/2). I was told the aquifier would "easily" handle the increase. The well was about the same debth as yours. I found out the hard way that more isn't better as the well sanded up real fast from the increased flow. The aquifier may have the capacity but it sure couldn't handle that sort of flow from one well. I now have two happy wells with two more on the drawing board for future increase requirements.

I have heard that intermittent drawing is better than continuous. Pump like mad into a reservoir, then let the pumps stop.

Others have suggested on an intermittent schedule to actually let a surge of water back into the well to move the particles around.

Personally I hesitate at back flowing the well due to risk of contamination.

Does anyone actually have experience with these techniques? Sometimes I think people blow seven types of smoke.

Nah

One pump, one tank, one well, two cheap meters and split the cost accordingly.

At the hatchery redundancy is of prime concern. We can (barely) survive on one pump. The fish will at least live. Lose all water and they are all dead in 1 hour. Before redundancy and deisel gen sets etc we have lost the entire years production in one hour. 300,000 fish down the toilet.

Guest here seems to have hit upon it: you're trying to bill two tenants by having two pumps and two reserve tanks--and wiring the controller so that both pumps can't run simultaneously--so that the cone of depression of one pump doesn't starve the other pump, and vice versa? And you don't want one tentant to "rob" service quality from the other, and vice versa? So that neither tenant will have cause to whine about the other? Or perhaps you merely want to increase flow to accommodate the second user group?

Seems here that this would be do-able, and that the two pumps could even share common air injection [others please chime in on this aspect]--provided that the mininum water table significantly exceeded any potential cone of depression by either pump, or both in combination. But the question would be, would you really want to do it this way; to incur the large expense, and potentially even greater, more prohibitive risk of doing it this way: the prospect, for example, of needing to also drill the well even deeper, if not now, then later. It would seem that metering or some other approach--including replacing with a larger pump--would be much to be preferred and entail much less risk. Or drilling a second well might be the better way to go in terms of long term service quality and lessened (long-term) expense and risk. Just an alternative opinion.

A newer alternative energy well pump is the grundfos sqflex series they are an ac/dc pump that will run off 100-300 volts dc and 90-240 volts ac. I have installed these pumps and have some running off of roughly 900 watts dc that are pumping 30 gpm. A great acheivement in well pumping

If you are connecting the two individual pumps in parallel (piping) on their discharge piping side, to double the volume to a single pipe that goes onwards to one or two houses, the pump curves, (characteristics of pumping) must be identical if they are submersible centrifugal pumps. If you are connecting two pumps electrically in parallel, this is OK if the circuit size can deal with the amperage requirements of both pumps plus a safety margin for deterioration that may reduce voltage to both pumps if one pump starts to deteriorate.

George

hello friend,

it is possible to connect a two water pumps to a single source deep well water supply, but more care is taken for pump at lower depth as it should not run dry.

i think it is more suitable to have one larger capacity pump. as it will ensure less care and the life of borewell will also sustains higer. you can also have less cost of running and less cost of installation as less delivery pipe will be used, single control panel etc.

moreover simply attaching one non return valves and 'x' numbers of flyvalve you can have 'x' number of supply lines. if any another inquiry regarding deep pump mail me to seerex154@yahoo.co.in

thanks to all of you freinds,i have learned a lot from you,for now we change the design we make to have a one larger capacity pump as advise by seerex154,maybe i will contact you on other days,regards to everybody,once again thank you very much.