"BobK207" wrote in message
oups.com...

Bob wrote:
due to heavy rains lately in Pacific Northwest I notice for first time
that
the junction between one of my downspouts and the 4 inch PVC pipe that
drains the rainwater away spouts water onto my lawn - it looks like a
natural spring!! The other downspout-4inch pvc pipes around the home
function perfectly well.

I suspect the underground pipe is clogged and am tempted to rent a hand
driven snake to unclog. Appreciate any thoughts anyone with similar
experience may have had.
thx
bob


Start the cleaning process from the discharge end.

Depending on how long the pipe is, a shop vac might be helpful in
removing the debris

Hand snake is gonna have a hard time with a clogged 4" line


Do oyu have good access to the discharge end? & good water pressure?

you could water water jet with with a length of 3/4" PVC & one of those
garden hose mini fire hose nozzles


As above.
Clean out what you can by hand and shop vac, etc.
Then use the hose - biggest diameter you can get your hands on.
Alternate with the hose wide open, or with a blaster nozzle ( File
of any sharp corners so it won't catch on things.) Slide the hose
in and out repeatedly, twisting it various ways, to thoroughly clean
out the muck. It will flood out of the pipe until you finally get through
or give up. On my house, I discovered that the drains went into a
concrete sistern with an outlet pipe to the back yard. I did the same
cleaning method to get that drain working.

Put some kind of screening into the gutters or downspouts to keep
leaves and needles from washing underground.

Bob