I was going to use air until I read something saying they recommended RV Antifreeze because it keeps the faucet rubber seals soft and compliant. But the air will let them dry out.
Sounds plauseable so I used the antifreeze last winter.
Perhaps if your RV is in storage for longer than 6 mo or a year the Antifreeze will be better? Or over time (5 years +) the accumulated effects of the air will dry out seals?
I dont know - Dont cost much or take much time either way.
You will still need RV antifreeze for the P traps (sink and shower drains) and the holding tanks. Even if empyy I think its good ideal to put a little in both tanks.
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2017 Axis / 25.4: Big Foot Levelers, Aims 1200 Watt inverter, Ceramic Window Tint, Full River AGM 6V batteries, Front Hellwig Sway bar / Rear Track Arm, Safe T Plus Steering Stabilizer, PD 4655 converter, Hard Wired Surge Guard, WEboost + WiFi Ranger, LED Headlights/Driving lights, TPMS, Surge tank, Tornado flush, Viair Compressor
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