"jim" wrote in message
...
On 11 Feb, 20:26, "Sumgod" wrote:
"jim" wrote in message
...
On 11 Feb, 14:58, "Sumgod" wrote:
Hiya! Any info or experiences you can share greatly appreciated.
Situation: Water supply comes from a well (old brick 'tank' approx two
metres deep and one and a half across built over a spring). In the
house
is
a Grundfoss pump, uv light and sediment filter. These and the pipe
work
to
the well were installed 3 years ago, replacing old iron pipe work. The
water
has been tested and the supply is fine.
The problem (if there is one) is that the Pentek sediment filter gets
clogged up after a couple of weeks (supposed to last 12). It turns an
orangy
brown (iron oxide?). I've also found and netted filaments of the same
colour
from out of the well.
Currently the pipe in the well has a foot valve and strainer on it.
I've been wondering whether I can provide 'extra' filtration in the
well
itself. Cleaning would be easier (no draining down, etc) and the life
of
the
sediment filters would be prolonged.
I've considered replacing the foot valve with a floating filter (see
link
below), but since I'm ignorant about the properties of iron oxide (is
it
evenly distributed in water or does it settle out?) I'm unsure whether
this
would have a positive effect.
Finally (and apologies for the long post), does anyone know suppliers
of
Pentek filters? I've Googled but to no avail. Currently I have t get
them
from the hooray-henry who installed the system (sub-contract to a
building
firm) and would rather escape his expensive clutches if possible!
Many thanks - Tony
Pentek:http://www.pentekfiltration.com/en-u...Cartridges/ECP...
Floating suction filters:http://www.wisy.de/eng/eng/saf.htm
hi tony - we have had similar (tho lesser) issues with our spring
supply and iron - presumably if i understand it correctly - your foot
valve and strainer sits on the bottom of this brick "tank"? and so
sucks up sediments etc and sends to your cartridge filter which bungs
up prematurely? - if so could you somehow raise the foot valve somehow
to clear it of the sediment IOW allow the sediment somewhere to
collect *below* the suction level of the pump?
few bricks and a paving slab?
next prob would be how to dispense of accumulated tank sediments when
they build up - but there's ways and means! welcome to private water
supplies!!!
for filters - google WESTDALE FILTERS or try looking for filters on
Ebay - I think what you use is common enough (is it 10inch?) it's just
a matter of finding someone who talks and prices sensibly - NB I
wouldn't worry about the pentek brand as long as you get ones that fit
your housing(s) and offer suitable filtration.
hope it helps
jim
Jim, thanks for info and advice. I'll certainly give Westdale a look. And
you're right it is a 10" one.
As for clogging up the foot valve, that's what I'm not sure about. I
could
shorten the pipe so it wasn't so near the bottom. Or get one of those
floating filters. On the other hand if the sediment is evenly distrubuted
thoughout the water, neither of these things would make a difference.
Thanks again Jim!
given enough time the sediment should drop to the bottom - is your
supply very "agitated" - i.e. always stirring sediments up in the
"tank"? if so then you could do with somehow removing or lessening the
amount of agitation to allow the iron to drop - in our case it is rust
and is formed when dissolved iron in the water reacts with oxygen at/
near the surface to turn to iron oxides - so what you could look to do
also is encouraging air to mix with your supply and so try to get the
sediment to form, then try to calm things down in your "tank" (if they
are very agitated currently - gushing stream? etc) so that the
sediemnt has time to drop, then take your water via foot valve etc
from well above the sediment layer. periodically you will have to
empty/wash the tank of the sediments that build up - you will know
it's time cos your in house filter will clog too quickly than normal.
not sure what you mean by cloigging the foot valve? - my advice was to
raise the foot valve above the accumulating sediments so that when
your pump pumps it doesn't just suck the sediemnt through and clog
your 10" cartridge filter....
How far off the bottom of the tank does the foot valve sit now?
jim
Hiya Jim,
Thanks for your time and help.
The spring fills the tank to overflowing (via piped overflow) imperceptibly.
No agitation.
As I said the foot valve etc was installed 3 yrs ago. It's only recently
that the sediment has become a problem in terms of shortening the usage time
of the filters. Taking your point about air and iron oxides reacting, I'm
wondering if the 3 yrs is about the time for the oxide to build up in the
water around the footvalve (about 9" from the bottom). In which case, as you
say, raising the valve will help.
Sorry about using the word clogging! I did mean to indicate the vale sucking
up the sediment.
Thanks again Jim!