The water pump has a sensor in it that shuts the pump off when the system reaches a certain pressure, usually 45 psi. Most city water supplies should approach or exceed this level of pressure. If the city water is turned on in your rig, the pump should never turn itself on.
The only way to get the pump to function is to remove the city water pressure, usually by turning it off at the spigot.
If the pressure in the campground is really low, the pump may well run whenever you turn on a faucet. Depending on circumstances, that might not be such a good thing as the pump may try to pressurize the entire campground system.
One thing to always check when setting up is the pressure at the campground spigot. If the pressure seems decent there, but you have low pressure in the trailer, there may be a problem like a kinked hose or a clogged sediment filter at the trailer's city water connection.
(If you think about all these things, you begin to understand why folks recommend that both the water pump and the city water be shut off when leaving the trailer for any appreciable length of time.)
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'11 Cougar 326MKS loaded with mods
'12 Ford F250 SuperCab 6.7 PowerStroke Diesel
Amateur Radio: KD2IAT (146.520) GMRS: WQPG808 (462.675 TPL 141.3)
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