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We mostly rely heavily on our RV’S water system, for personal hygiene, dishes and, in some cases, for washing clothes or drinking. Then, it takes a few minutes to pay attention to this vital system.

Pressure regulator

To protect the RV from excessive pressure damage, use the water pressure regulator when connected to an external water source. These are available on most RV dealers and supply stores online. Many of them can simply be attached to the water supply pipe that goes from campground tap to coach. Other larger regulators can be mounted permanently on the coach.

Prevent Freezing

To prevent damage caused by freezing weather to the RV water system, completely drain the system. You accomplish this by turning off the water pump and opening all taps for hot and cold water. Then open the low-pressure vent valves. Leave taps open to allow all water to drain. Do not forget to empty the boiler. This can be done by removing the water heater plug located at the bottom of the tank. Hold the plug inside the water heater so you do not lose it and re-install it before reactivating the unit.
Briefly run the water pump to remove the water to avoid freezing damage. Pour RV antifreeze into the toilet and all other drains (sink, sink and shower) to ensure that the “U” traps are without freezing. Unscrew the shower hose from the appliance to the tap and let it go empty. Check ice producers. Leave the system empty and dried to prevent accumulation of microorganisms in the water.
Some owners prefer to use compressed air to blow lines; Special adapter connects the water connection to the auxiliary air compressor.
Another way of protecting the water system from freezing is the use of a special RV antifreeze, which is intended for drinking water systems. It is attracted to the RV water pump and circulates through the system by opening the valve until a liquid with color comes out, indicating that it has reached that component.

Drainage of freshwater tanks

To empty the clean water tank, find the drain valve. This is usually outside, near the water tank. Open the valve and allow the water to drain until it is empty. If the tank does not have a drain valve or plug near the bottom, you must empty it with a faucet. If you do so, make sure that the water pump does not dry for more than a few seconds.
Cleaning the freshwater system

To clean the freshwater system, follow these steps:

Fill the water tank half full.

Add a one quarter cup of chlorine and 1 gallon of water for each 15-gallon tank capacity.
Open all the taps until the air has escaped the system and the solution filled the water system.
Let the RV sit for several hours.
Drain the water supply and fill it with fresh water.
Allow some fresh water to pass through all taps and pull out the system again.
If you find out that the water still smells unpleasant or does not taste good, add a box of baking soda mixed with water in the system. It will make the water fresh.
When you are getting ready for the RV season, pressurize the fresh water system from the pump and close all valves, let the pump stop when it reaches full cutting pressure. Pay attention to the pump that will come shortly after. If it often comes with all valves disconnected, there is a pressure drop. Check the system for this and repair it if necessary.

Final Thoughts

Most trailers and motor vehicles come with special instructions on water maintenance and freezing preparation. Always follow the factory recommendations when available. This generic procedure is intended for a general guide for experienced DIY experts, and if different from factory data, follow these procedures.

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