Can someone explain the different pumping systems, tanks tankless etc...
I have a cottage with a shallow well probably 30 feet. It currently has a
1/2hp jet pump and ~25 gallon tank. The tank is full of rust which in turn
is coating the UV sterilizer bulb. I am going to replace everything. I
noticed That jet pumps are sometimes call convertible, what does that mean?
Some wells I have seen have 2 pipes in them, what system is this? I would
like to go with a fibreglass tank and my local well driller says a 6 gallon
size is plenty, why was there a ~25 gallon one put there originally? What
about bladders, do all tanks have them? Some jet pumps are stainless steel,
is that the entire pump housing or just the shaft. I have some apartment
buildings and the domestic hot water system has to have a bronze circulating
pump so why is drinking water from a well allowed to be pumped through a
rusted cast iron jet pump? Also I see some pumps listed as not needing a
tank, why is this. When are submersible pumps needed? Thanks for clearing up
some of this for me.
I imagine that means that if you have a very shallow well, you can use a
single pipe, and if the well is deeper it can use 2 pipes. For example my
parent's cottage had an artisian well (flowing like a spring), so all it
needed was a single pipe jet pump to build pressure. Since it was always
flowing we did not have to worry about purifying it, although, it was very
You can only lift water about 30' with a total vacuum, so if the water
level is that far down, you cannot simply suck it out of the ground (you
would have to push it out with submersible or 2 pipe jet).
Some iron is good for you (needed for red blood). If a pump is stainless
steel, I would think that includes all the parts exposed to the water (not
necessarily external parts). A jet pump needs to be primed if totally out
of water (or if drained for winter). A submersible pump does not need to
be primed, since it is underwater.
I would be skeptical of a tankless pump (where would thermal expansion
from the hot water heater go), and even a 6 gal tank sounds rather small
(pump would cycle on/off 4 times more often than 25 gal). A bladder makes
sure that the tank does not lose its air charge even if shut down or
system is drained (at least until the bladder wears out).
David Efflandt - All spam ignored http://www.de-srv.com /
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