I have a basement wood burning stove. The basement wall is block, and the pipes from the stove make a 90 degree angel to basement wall then goes to a block chimney on the outside. The chimney was stainless steel lined. The clean out trap behind the stove on the block basement wall is not functional due to the stainless steel liner. The way i clean the ash is by removing the 90 degree pipe and reaching in to clean the ash after the stainless steel liner has been cleaned. The gap in the block chimney from the clean out of the stainless steel liner and the old clean out trap is a couple feet - that would have to be filled with cement. The stove is on the wall leading to the front of the house. I had to redo the front lawn due to bugs,tree roots, and very warm last summer. Anyways, since I removed the tree roots - water has been entering the chimney through the old clean out trap - during heavy rain. Happened twice this year. I do NOT want to mention a couple " four letters" every time - so what would be best route in solving this problem? In the trap I am not able to dig a hole and fill it with gravel. I thought of taking mixing cement and filling the area-but will that stop the water seeping in. Hoping water does not shoot out the 90 degree pipe. Also, do not want any free standing water behind the basement wall. Would buy a tree that absorbs alot of water for front lawn help? Any advice would be appreciated Thanks, one NOT wanting to say "four letters"