Structure this into your lease:
The water closets and waste pipes shall not be used for any purpose other
than those for which they were constructed, nor shall any sweepings,
rubbish, kitty litter, soiled kitty litter, or any other improper articles
be thrown into them. Any damage to the building caused by the misuse of such
equipment shall be paid by the Tenant.

And while your at it put this in too:
NO ANIMALS, FISH, BIRDS OR PETS OF ANY KIND SHALL BE PERMITTED IN THE
PREMISES WITHOUT THE LANDLORD'S PRIOR WRITTEN CONSENT. The granting of
consent to others shall in no way be deemed the granting of consent to the
Tenant, nor obligate the Landlord to grant consent to the Tenant.

Of course, with the no animals clause, you can get rid of the kitty litter
clause.
Do yourself a *big* favor. Get rid of the animals. Do one of the following:
have the tenant sign a new lease with the no pet clause, give the tenant a
notice stating you're not renewing or if a "tenant at will" (month to month)
give the tenant the required notice to vacate.

The tenant may think you're not nice, but, it's your property, and you,
ultimately will have to pay for any pet damage you find after the tenant
leaves.

Of course, their are various laws concerning everything I've stated above.
Consult a lawyer schooled in landord/tenant law before acting.

Bob

"Tom Rodman" ] wrote in message
l.net...
I'm a landlord now dealing with problems in a basement floor drain
(Palmer valve) - sewer gas smelling up basement - smell is musty, not
clear what it is but I could convince myself it's like cat/crap
cat/litter/.

This is an old single family (Milwaukee WI, 1903), converted into a duplex
from a single family. The upper unit has a good tenant with three cats.

Should I insist that the tenant refrain from flushing *any* of the cat
crap or
soiled cat litter down the toilet?

One plumber friend I talked with last night was shocked that cat litter
might be getting into the drain system. His concern was that the litter
might accumulate in the drain pipes, and might require an expensive
repair- cutting out the cast iron pipework to remove the eventual hard
blockage.

Comments?

--
regards,
Tom Rodman
pls run for my address:
perl -e 'print unpack("u", "1\:6UP\,\$\!T\F\]D\;6\%N\+F\-O\;0H\`");'