On Fri, 13 Jun 2008 20:19:26 -0700, wrote:

On Jun 13, 11:10�pm, dnoyeB wrote:
On Fri, 13 Jun 2008 15:31:48 +0000, Reno wrote:
dnoyeB wrote in
:

Clay is so fine it won't settle fast enough to stay out of pumps and
pipes. �I installed my sump pipes with as much slope towards the
outlet as possible so they empty faster after each pump cycle. If you
could raise up the pipe inside the house and as far from the outlet
as possible you could get a bit of flushing action that may help.

Unless you have a very small capacity pump or a lot of bends (more
than two or three) then bigger pump won't help.

You could try to install some geotextile fabric around the inside of
the sump to see if it helps. You need as much filter flow area as you
can get to minimize plugging of the fabric. Make an inside sump pail
about an inch or two smaller than the sump out of some sort of screen
material - plastic is best to avoid galvanic action with pump steel.
Tightly wrap fabric around screen, drop screen into sump and pump
into screen. You must use the � felt type fabric, NOT the woven type.

If you really want to try a cheap and quick fix - wrap the pump with
some heavy plastic window screen material, the type recommended for
cat and dog resistance and then wrap the screen with the fabric.
Shape is like a big sack to get most flow area. Tie it up around the
discharge pipe. Then just pull the wrapped up pump once in a while to
check for clay buildup on fabric and rinse if needed.

The fabris has a very high flow capacity when it is clean but you may
get flooding of basement if it plugs up with clay so you need to
monitor it and either replace or clean when required. If pipe is left
plugged then there is a risk of flooding from the existing setup as
well. Either way maintenance is required. Pump would overheat and
burnout if flow was restricted either on inlet side or outlet side.
Inlet restriction is worse for pumps.

Most risk of plugging is with highest inflows to sump so check it
after major storms plus on a regular schedule.

There may be some good news in that the amount of clay may reduce
with time. The situation within the ground may stabilize and reduce
the amount of clay contribution. You should do all of the usual yard
drainage improvements to reduce the volume of water infiltrating to
the sump. That would speed up stabilization. You can expect clay to
re-appear after severe storms so check for plugging of filter after
all bad storms even after problem seems to have disappeared for a few
years.

As a possible idea - is there a potential source for the clay other
than the obvious drain tiles? There could be a leaky water line
causing the clay content. Is the sump pump running when it shouldn't
be? Or more often then it should? Is it running during periods of dry
weather when you wouldn't expect any water in the drain tiles? Is
there a check valve on the pump or in the discharge line near the
pump? If not the reverse flush from the line when the pump stops
could be flashing clay from the sump pit or surrounding material. Is
there a floor to the sump or is it sitting on bare soil? I've seen
several sumps made from just a piece of pipe standing upright.

The amount of clay deposition you describe seems huge - is yard
drainage really poor? Ground should slope well away from house in all
directions and all roof spouts directed well away.

I think there is just lots of water. �Small stream runs next to my
house. � Rainfall does not affect the frequency of the sump pump.

Also, I like to stir up the dirt in my pit and let it eject into the
backyard. �It may be better for me to just keep snaking it...- Hide
quoted text -

- Show quoted text -

I would go to larger exit drain lines, with gradual bends. like 2 22.5
degree bends rather than a 45......

you can buy 3 nch flexible PVC line, althiough its not a home depot
item.

a nice smooth joint and minimal bend line will not collect so much silt

I surely would if I could get to it. its 1.5" line all the way to outside
the house. Pump actually takes a 2" line. The drywall is up in the
baasement though so I cant get at it anymore...