I suspect he does also and either it or the screen around it (if it
has one) is partly clogged. If he has a self-primng pump, it would
work on his system without a footvalve. Sounds like the maximum draw
distance would only be about 20', well within self-priming range.
On Apr 25, 12:48 pm, firstname.lastname@example.org wrote:
A foot valve is a check valve, yes. But what the others asre talking
about are clearly _not_ footvalves. If they meant a footvalve they
would use the proper term.
I see this all the time here, the instant a pump problem is mentioned
the swarm of "check valve" shows up - a clear indication that the
posters are probably not knowledgable about pump systems.
When the specs say the limit is "25 feet of head", does that mean the
actual depth of the water level in the pipe cannot be more than 25
feet below the pump?
Reason I ask is my water level is 2 feet below the basement floor, but
the actual well casing is at least more than 30 feet down. I stuck an
electrical snake down the casing, and it reached 30 feet until the end
of the snake, so its probably even deeper.
No, the "head" is how far it will pump vertically, above the pump. That
doesn't mean that your pump can't lift water from 25 feet down (though that
would be about the limit for any pump). "Shallow well" or "jet" pumps are
designed to lift water from wells lower than the pump. "Deep well" pumps are
put down in the well and can lift higher.
The level of the well casing doesn't matter, only the level of the water. Of
course the level will go down when the pump is operating and further in dry
Yes, measured from pump to the top of the water. Matter of physics,
water can be sucked up a pipe only by air pressure pushign down on
it. Theoretically atmospheric air pressure at around 14 psi would
allow 'sucking' up to 34 ft but restrictions to flow, etc cut that
down to the accepted figure of 25-26 ft.
Even at 2ft, without a check valve your pump must be self priming.
After thinking over the problem I can ony think of 3 items that may be
1. Malfunctioning foot valve
2. Pump worn out - probably not as it appears it pumps out the prime
3. Well not producing enought water to maintain flow - probably not
in your case. If the well has 20 ft of water in the cased portion it
would take more than a very short period to pump it 'dry'.
Looks like footvalve to me.
Question: What is the 'cased size' of the well? Wide enough to put a
new suction ipe in alongside the one already there? If so, that is
what I would do if it is physically possible.
On Apr 25, 12:51 pm, email@example.com wrote:
And the point is that adding another, useless, unneccessary one at the
top causes _more_ restriction. One is all that is needed in the
system and one in workign order is absolutely necessary. Of course if
the pump is self-priming and within about 26 ft fromt he static water
level the footvalve can be eliminated.
There is an exception. In the case of a submerged pump (they contain
a checkvalve internally) where that valve is leaking back, one can
'shadetree' a fix by inserting a checkvalve up top prior to the
pressure tank. Keeps the sytem from draining back when the pump
The reason that doesn't work on suction pumps is that the intake pipe
must be kept full of water to maintain prime. Unless, of course,
the pump is self priming and is no more that about 26ft above the
static water level.
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