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rich85704's avatar
rich85704
Explorer
Dec 24, 2015

Winter in warm-ish climates

I live in southern Arizona. My rig lives in a storage lot here in Tucson, and I'm thinking about some trips in the next month or so. I'm wondering about winterizing. I know how to winterize the rig, draining it and refilling with anti-freeze. It's a pain, but do-able. I did it last year, mostly to teach myself how.

Like most rigs, I suspect, most of my pipes run inside the vehicle. Some are exposed in the undercarriage, and some run up inside an external wall.. Winter low temps here in Tucson are generally well above freezing, although there are occasional nights when it gets down into the high 20s. A few years back, lows were in the teens for a couple of nights running, and the plumbers had a field day!

I'd like to consider winter trips into places like southern New Mexico, where low temps are routinely in the mid-20s, like they are sometimes here in Tucson. I've already had a few nights like that, and there was no sign of water damage to the rig in storage from burst pipes.

So I'm inclined *not* to winterize the rig, mostly so I have water for washing and flushing. If we get a few VERY cold nights in the forecast, I can go spend a morning grumbling and flushing and winterizing.

Advice from old hands, particularly those who live or travel through places like this?

Thanks!

Rich
  • I'm with brirene. For the effort it takes to blow the lines and pour a few ounces of AF in the drains, it doesn't make sense to take a chance. I've camped a few nights where it dropped into the low 20s and had no problems, but it wasn't an extended period of time. A friend didn't winterize one year and it cost him a small fortune to re-plumb his trailer.
  • It very much depends on your motorhome and how it's plumbed and how things are connected up. I don't think there is any real standard for how things are designed. Some RVs are much more winter capable than others.

    On my Coachman Santara 315QB of the same vintage, the plumbing is all enclosed within the heated envelope of the vehicle, and there's a little furnace duct outlet in the bay where the gray and black tanks are. So long as the furnace is running and keeping the interior somewhat tolerably warm, there's no problem with camping out in consistently below freezing temperatures. I do suspect that really cold temperatures, say sustained temperatures below zero, might start to cause problems...but I don't really intend to camp under such conditions. It would be a drafty experience regardless.

    I would guess that you would not have any troubles with what you're proposing, doubly so if the plumbing is at all similar to my rig. However, I disclaim any responsibility for burst pipes etc. if my guess is inaccurate.

    As you probably already know, you can also winterize by draining and blowing the water out of the plumbing with an air compressor, which saves on antifreeze (some is still needed for the drain traps) and makes it less time consuming to dewinterize as there's no need to get the antifreeze out of the plumbing system before using it and no antifreeze aftertaste. People have their own preferences here.
  • In that situation I think I would just bliw out the lines, empty the wh, add some af to the drains, call it good. Heck, lot of folks in the north do only that. If you're getting an extended cold spell, go grumble and do it fully. Mho, ymmv.