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Posted by Ook on June 4, 2007, 6:29 pm
Jackson wrote:
>>> lovele...@bellsouth.net wrote:
>>>> I have a Sears Craftsman Shallow Well Pump that I would like to use,
>>>> but have no experience in installing. Is there a diagram I could look
>>>> at to see how it is piped?
>>> I used to have a nice diagram, but I can't find it right now. However,
>>> installation is very easy. The input goes into the well (doh) AND you
>>> (optionally) need a one way valve somewhere in the line. They make "foot
>>> valves", which is nothing more then a one way valve that goes at the end
>>> of the pipe going into the well, so it is at the bottom of the well, and
>>> they usually have a screen to keep rocks out of the pump (I ruined one
>>> pump because I took the screen off and stuck the inlet pipe into the
>>> muck at the very bottom of the well). You can get these at most any
>>> hardware store for about a $20 bill. Another way is to not put a foot
>>> valve at the bottom, but use a one way valve somewhere in the inlet
>>> line. Doing it this way makes it easier to prime. Note that a foot valve
>>> or one way valve is NOT required. It is there to keep water from
>>> draining out of the inlet pipe. Without it, you have to prime the pump
>>> before each use, which is a pain.
>>>
>>> The outlet goes to a water tank. I'm not sure if this is just a 25
>>> gallon tank, or if there is anything special about them, someone else
>>> here will have to answer that. It's just a big accumulator, without
>>> which you would probably break the pump or bust pipes or otherwise find
>>> operation of the pump to be extremely erratic, depending on the pump. I
>>> think it would go into hydrostatic lock and break the pump and/or your
>>> pipes. Somewhere between the outlet of the pump and the water tank is
>>> the water pipe you take the water out of.
>>>
>>> Here is mine:
>>>
>>> http://zootal.no-ip.info/stuff/2006/2006%20June%20Garden%202/DSCF3474...
>>>
>>> The front of the pump, where it goes out and down into the ground is the
>>> inlet. The outlet is on the top, and it goes to two faucets, the tank on
>>> the right, and back into the ground to feed faucets around the house and
>>> in the garden.
>> Minor nit pick. The 'one-way valve' (check valve is the technical
>> term)
>> has to be placed so it will _always_ be under the water. Simplest
>> plumbing is to just use a foot valve.
>>
>> Harry K
>>
>
> I respectfully disagree with that - the foot valve goes under water, but the
> check valve (if also used) should be close to the bladder tank.
>
>
I used to run mine without a foot valve, and with a one way valve on the
surface near the top of the well about 50 feet away from the pump and
tank. It worked fine. The only reason I switched to the foot valve was
the foot valve had a screen on it. I once stuck the pickup tube into the
muck at the bottom and sucked up a bunch of gravel and ruined the
impeller in the pump - doh!
Does it really matter where the check valve is, so long it's somewhere
in the inlet side? For that matter, if it were on the outlet of the
pump, it would still stop water from discharging back through the pump
when the pump cycles off, I bet it would work there also.
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