Upon arrival customer stated the sewage ejection pump was not working and backing up in the bathroom in the basement. I informed the customer I would have to pull the pump In order to see what is going wrong. Gave customer estimate. Customer approved the estimate. I pulled pump and noticed it had a blockage in pump. I cleared the blockage and put the pump back in the pit and tested it and the pump still was not working. Informed the customer we would have to replace the pump. Gave customer estimate. Customer approved the estimate. I took the old pump and old check valve out. I installed a new pump with a new check valve. Tested system and system is working properly with no issues or leaks.