Performed annual safety and maintenance inspection. Inspected all visible plumbing in the home, tested all faucets, toilets and tubs/showers, tightened all under sink drain piping and tested for leaks. Drained and flushed hot water heaters, and Inspected, water piping and drain condition. The home has two hot water heaters that are Bradford White 40 gal propane and are 5 and 7 years old. Upon arrival customer had complained of inadequate hot water. The left water heater was not lit. Followed pilot lighting procedure and relit the pilot light. Water heater then fired up, however the water heater gas valve on both water heaters were showing an error code of weak pilot sensed. During drain and flush noticed the T&P relief valve on the right water heater was leaking during use. After drain and flush, refilled both water heaters and ensured they were both working. Water coming from fixtures were about 120 degrees. Customer stated that the toilet on the main level would sporadically flush