Arrived at the customers home. I spoke to the homeowner about two gate valves on her water treatment filter bypass system that she wanted to get replaced with ball valves. I provided her with an estimate to replace both shut off valves. She signed off on the estimate. I began by shutting water off at the main water shut off located in the same closet as the filter system. Next I laid a rug out where I would be working. Then I brought in my tools and materials. I disconnected the filter using the union on the left of the filter and the union on the right. After I had the filter disconnected I removed the two gate valves. Next I fabricated the new ball valves into the system. Soldered them in. Then slowly turned water back on to the filter. Followed by slowly turning the water back on to the house. Bled all air out of the water lines. Thoroughly tested for leaks. No leaks were found. While I was there the homeowner asked if she could have an estimate to replace her hot water heater. I pr