Please choose the correct ending to complete the given sentence: Education and Communications: [header] How to replace a water valve [title] Identify your valve type. [step] There are 3 types of valve connections, and your project's level of difficulty depends on how the valve connects to the water supply line. A threaded valve screws directly onto the water supply line and is easy to replace.

Ending1: A valve with a flat face attaches to the water supply line and adapts to replace the valve from a distance. [title] Check for a pressure release pin or use the tools to tighten the valve into the right position. Ending2: In a compression connection, the valve screws into a hexagonal nut that fits around the supply line. The most difficult type to replace is a sweat valve, which is soldered onto the supply pipe. Ending3: A bent valve holds water while a screwed valve does not. [substeps] Welded valves tend to hold water better, but any differences will interfere with proper repairs. Ending4: Others operate exclusively on fixed valves ranging from 1/8 "-125 " measurements. However, you may be able to re-wire the valve if the valve is installed incorrectly or again issues with its screws.

Answer format: ending1/ending2/ending3/ending4