To present a slide show I downloaded the Chrome browser. to show the browser screen on the Chromecast receiver monitor/TV. For the slideshow I added the Chrome browser iSlide extension. I found that I could not use it directly to present a folder of photos on the laptop.
Installation of water heater requires a plumbing permit. I recently had a water heater installed and the contractor got a permit. When the inspector came, he asked why he was there. I replied that I was told a permit was required to replace a water heater, but he said he had never heard of such a thing.
The pilot light from your water heater is the flame that will ignite the fumes from any spilled flammable liquids. If your water heater is NOT a flammable vapor ignition resistance water heater, it must be raised to 18 inches if it is located in the garage where a car would be parked. In some of the cities on the Peninsula and in the Bay Area, you may install a flammable vapor ignition resistance water heater on the ground in a garage.