Surge protectors are probably a necessary item. I have used both TRC units and Progressive Industries and they both are reliable. Electrical spikes, high or low voltage can damage electronic equipment, motors or air conditioners. Several times they have interrupted power due to low volts or fluctuation.
They also delay restoring power for +- 3 minutes to prevent overloading the AC compressor. Also provide some protection from a nearby lightning strike. (nothing protects from a direct hit)
I presently have the Progressive LCHW30 unit in my Siesta. I have always used the hardwired models. This chart shows some of the functions.
Progressive Industries RV Surge and Electrical Protection industry lea
a 5/8 hose will carry more water and most RV showers are fairly anemic to start with.
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