On Friday, April 10, 2015 at 2:44:05 PM UTC-4, want safe water wrote:
If you open a spigot, whatever you have, that's as close as possible
to where the water comes into the house and fill a 5 gallon bucket,
then let it settle, is there sand in that? If there is sand there,
my next focus would be on testing at fire hydrants on either side
of your house. Has the water company done that? What about the
neighbors? Any sand there? If the sand is only in your house, then
it would seem most likely that the problem is with the pipe
between your house and the water main. It could be totally unrelated
to Sandy. What kind of pipe? If it's a 75 year old house, could be
steel pipe and it's shot by now.
The odd thing I guess is that sand is coming in. IDK if that's typical
or not. I have seen it happen with pool pumps when there is a crack in
an underground line. But there the pump cycles on and off and I would
guess that the sand migrates in when the pump is off. With constant
city water pressure, water would go out, but I would think it would
take a good size hole for sand to be able to come in. At some point,
if the leak is large enough, you'd probably see water in the yard.
Really your best source for this would probably be the water dept
folks. They must have lots of experience there. Besides saying it's
not their problem, what exactly do they say? And on what basis are
they saying it's not their problem? Did they come out, draw test water
at hydrants either side of your house?