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Old 06-21-2018, 08:54 PM   #1
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How often to use low point drains

When we first started out 3 years ago new to camping, I would open the low point drains at the end of each trip. For some reason which I no longer remember, I quit doing that and started only draining at the low point drains in the Fall when I winterize. So I'm thinking again. We typically go out for a week and then come home for 2 to 3 weeks and out again. I do let water run thru to flush the system when we reach the campsites. Is the 2 to 3 weeks with water just sitting in the pipes too long to go? Opinions please.
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Old 06-21-2018, 09:10 PM   #2
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I guess the argument could be made both ways. When you leave clean water in the system it stays "clean" and when you drain it you introduce moist air that can promote the growth of all kind of nasty stuff. Think of all the crap that can grow in FW tanks if they are not periodically sanitized. I talked to the parts guy once at a RV repair place, he said they get many calls after a wet spell in the summer from people having trouble with their water pump, but it usually is only the strainer on the pump that's clogged with gunk from the tank.
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Old 06-21-2018, 09:23 PM   #3
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The more I think about it, it can't be good confined like that especially in Summer heat. I think I'll go back to draining each time and sanitizing before each trip.
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Old 06-21-2018, 09:39 PM   #4
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If my TT is going to be in storage for more than 2 weeks, I drain the system. My reasoning is that the water in the system lacks chlorine because its been reduced, if not eliminated, by my water filter. The chlorine is what reduces the risk of nasty stuff growing in the stagnant water.
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Old 06-21-2018, 09:47 PM   #5
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Try this. Fill a glass with water from you system, cover it and let it sit in your RV until your next trip. Examine the contents of the glass and determine if you are OK using it,
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Old 06-21-2018, 10:21 PM   #6
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Thanks for the opinions. I am going back to draining.
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Old 06-22-2018, 12:35 PM   #7
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Wow, I'm glad I read this thread. We returned from a trip a few weeks ago and I still had water in the FW tank. This is a new motorhome I picked up in April so thought since it was "new" sanitizing could wait. Boy was I wrong! I went out this morning and drained the tank...the smell of sulfur was unbearable. I would never have checked otherwise and discovered it next week at the campground when we go out for another long trip. I am now sanitizing and may even do it twice to make sure it is clean. I am now a believer.....
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Old 06-22-2018, 01:17 PM   #8
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Thumbs up

Quote:
Originally Posted by Mikemdd View Post
Wow, I'm glad I read this thread. We returned from a trip a few weeks ago and I still had water in the FW tank. This is a new motorhome I picked up in April so thought since it was "new" sanitizing could wait. Boy was I wrong! I went out this morning and drained the tank...the smell of sulfur was unbearable. I would never have checked otherwise and discovered it next week at the campground when we go out for another long trip. I am now sanitizing and may even do it twice to make sure it is clean. I am now a believer.....
Glad someone else needed the opinion like me.
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Old 06-22-2018, 01:28 PM   #9
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It's so easy that I open the low point drains after every trip. Drain grey, black, fresh, and open the low point drains. All part of my after camping procedures. I have thought about why, but it only takes 30 seconds to unscrew those caps so why not? No big deal.
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Old 06-22-2018, 01:52 PM   #10
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If you are going to use the low point drains after each trip, it is advisable to put the water heater into bypass BEFORE opening the low point drains.

Often times the crud from the bottom of the water heater tank gets sucked into the plumbing when using the low point drains and some of that crud remains in the plumbing to be pushed into the toilet valve and faucets on repressurization. We've seen MANY reports of it here.

Of course this means to drain the water heater, you'll need to remove the anode/plug as well.
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