Plumbing in Nevada is scale and heat in the south, and scale plus freeze in the north. Southern water heaters die in garages that bake, and attic lines pinhole into ceilings in towns that almost never see rain, so the stain gets blamed on a roof that did not leak. Northern pipes in exterior walls and crawl spaces freeze on ordinary winter nights. Hard water does shared damage, whether the supply is the Colorado River or a mineral well. A garage heater and an attic line in the south can both flood a house that has not seen rain in months. Slab leaks show up as warm floors. Sewer roots show up where trees exist, which is not every lot.
Know the main shutoff. Say whether you have already used it. Separate supply leaks from drain stops, and separate domestic water from irrigation and pool fill. A slow tub is not a failed heater. Several fixtures backing up together are a branch or a building sewer. Ask whether the proposal is a cable, a camera, or a repair of the pipe itself. A cable does not mend a break. In the north, say if the leak started on a thaw, because a frozen pipe and a corroded pipe are different jobs.
On a heater, say gas or electric and tank or tankless if you know. Ask for a shutoff, a pan, a discharge line, and haul-away in the scope. Ask whether scale was the reason the old tank failed. Wells and septic fields are common outside the cities. Say so. Manufactured homes use different fittings than block houses. A rural shutoff may be far from the door. Mention that before someone plans the visit around a city meter.
If water is loose in the house, do not watch it. Southern attic lines and northern frozen lines both get worse while you wait. Call the number on this page.