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Old 07-09-2016, 06:45 PM   #15
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I had the sulfur smell this week....My owners manual says 1/4 cup of bleach for every 15 gals. I have a 90 gal tank and added the required amount. Some camping friends do this routinely and leave it in there tanks, I worry about the damage bleach can do. How long should can this mixture stay in the hot water tank and plumbing?
I have found 4 to 5 hours to be adequate
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Old 07-09-2016, 07:16 PM   #16
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I have found 4 to 5 hours to be adequate
Will it harm anything if I just drain the tank and water heater and not flush tonight? Is it safe to wait and add more water when we leave on our next trip? The reason for these questions is I do not have access to water without using some hoses other than white for the distance to a water source at home?
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Old 07-09-2016, 07:20 PM   #17
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Will it harm anything if I just drain the tank and water heater and not flush tonight? Is it safe to wait and add more water when we leave on our next trip? The reason for these questions is I do not have access to water without using some hoses other than white for the distance to a water source at home?
Have you already put the bleach in the system? If yes then you need to flush. If you have just drained the existing water you can wait to sanitize.
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Old 07-09-2016, 07:22 PM   #18
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I know this is obvious, but make sure the water heater is off before you drain it.
They REALLY don't like to work when there is no water in the tank.
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Old 07-09-2016, 07:29 PM   #19
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I bleached before leaving the camp ground this morning and was not worried about leaving the mixture there until I started reading this. If it is not save for my RV h/w tank and plumbing to leave the chlorine residue in I'll need to be pulling out some black hoses and my filters this evening.
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Old 07-09-2016, 07:44 PM   #20
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I had the sulfur smell this week....My owners manual says 1/4 cup of bleach for every 15 gals. I have a 90 gal tank and added the required amount. Some camping friends do this routinely and leave it in there tanks, I worry about the damage bleach can do. How long should can this mixture stay in the hot water tank and plumbing?
The 1/4 cup per 15 gal (50 ppm) solution should stay in the tank for at least 4 hours. If you use 1/2 cup per 15 gal (100 ppm), then just one hour. This info comes from NFPA 1192 Standard on Recreational Vehicles and has been around for decades.

However, you could leave the bleach solution in your water holding tank (or, for that matter, the gray or black tanks too) forever. Diluted bleach breaks down into salt water fairly rapidly.

Finally, bleach will not harm your RV plumbing. Your RV holding tanks are make of ABS or polyethylene. Your RV plumbing is probably PEX, and those "seals" everyone talks about are probably made of Santoprene.

ABS, polyethylene, PEX, and Santoprene are all bleach resistant.
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Old 07-09-2016, 08:01 PM   #21
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The 1/4 cup per 15 gal (50 ppm) solution should stay in the tank for at least 4 hours. If you use 1/2 cup per 15 gal (100 ppm), then just one hour. This info comes from NFPA 1192 Standard on Recreational Vehicles and has been around for decades.

However, you could leave the bleach solution in your water holding tank (or, for that matter, the gray or black tanks too) forever. Diluted bleach breaks down into salt water fairly rapidly.

Finally, bleach will not harm your RV plumbing. Your RV holding tanks are make of ABS or polyethylene. Your RV plumbing is probably PEX, and those "seals" everyone talks about are probably made of Santoprene.

ABS, polyethylene, PEX, and Santoprene are all bleach resistant.
That is a relief to know it can stay in the system without causing damage. I have drained and will flush properly tomorrow.

Thank you for the replies,
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Old 07-09-2016, 08:37 PM   #22
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Quote:
Originally Posted by lenjen View Post
I had the sulfur smell this week....My owners manual says 1/4 cup of bleach for every 15 gals. I have a 90 gal tank and added the required amount. Some camping friends do this routinely and leave it in there tanks, I worry about the damage bleach can do. How long should can this mixture stay in the hot water tank and plumbing?
3 to 4 hours is recommended. It has worked well for me.
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Old 07-09-2016, 10:39 PM   #23
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Your stinky sacrificial anode needs replacing is my best guess.
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Old 07-10-2016, 08:17 PM   #24
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I own a few rental houses that have had the same problem over the years if the house is empty with the hot water heater is off for a month or two !! Even one house that had a year old water heater !! The easiest was to turn the water heater to the max high temp and run water though all the hot faucets every day for 15min. the smell usually is gone in less than a week !!!
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