You should take the time to inspect the baffle in your septic tank whenever you have the tank pumped out and the cover is off. The baffle is the part of the tank that prevents sludge and solids in the tank from entering the leach field. Sludge and solids can clog up the pipes in the septic field and will result in expensive repairs to clean and/or replace the pipes. The baffle is typically a wall made out of concrete that sits in front of the outlet for the pipes going to the leach field. However, the baffle can be replaced using PVC pipes if it breaks or deteriorates. Here is how you can replace the baffle with PVC pipes.
Eliminate Old Baffle
You need to remove all of the old concrete that formed the original baffle. You can break the concrete up with a small sledgehammer. Remove all the pieces of the concrete from the tank and dispose of it by throwing it in the garbage.
Attach PVC Fitting
A small portion of the pipe running to the leach field will stick out into the area where the baffle is located. Measure the diameter of the pipe. You will need purchase a tapered fitting made with PVC that you will insert into the leach field pipe. The fitting only needs to be about 5 or six inches long. The fitting is hammered into the leach pipe. Do not hammer the PVC; instead, take a small piece of wood and place it over the end of the PVC fitting and hit the wood with the hammer. This will prevent you from damaging the edges of the fitting.
You need to cut a piece of PVC pipe bout three or four inches long and cement it into the end of the tapered fitting. Make sure you only use PVC cement when cementing PVC pipes and fittings together.
Construct New Baffle
You will make a new baffle by taking a sanitary tee that is the same diameter as the leach field pipe and attaching a length of PVC pipe to it. The pipe should be long enough to extend down to about an inch or two from the floor of the tank. Cement the baffle to the small piece of PVC pipe on the end of the tapered fitting. Make sure the PVC pipe connected to the sanitary tee is facing downward.
Install Effluent Filter
Place an effluent filter into the top opening of the sanitary tee. The filter will provide an extra layer of protection to prevent sludge and solids from getting into the leach field. The filter should be taken out and hosed off whenever the tank is emptied.
You can now close the cover on the tank and start using your septic system again.