Switching from bleach to peroxide injection

[Nightowl66]

It's a long story so I will skip that and get to the main question. I have sulfur water. I have bleach injected before my pressure tank, then into a 80 gal contact tank, carbon filter then softener. The carbon filter needs to be flushed before switching to peroxide. What I think will work is, draining both pressure and contact tank, turn off chlorine injection pump then fill back up and run the carbon filter thru a regen/backwash cycle to flush it out, then drain tanks again and fill back up with peroxide injected water.
I am just wondering if that will work and if flushing with sulfur water will be ok? During normal scheduled backwash it would be with chlorine or peroxide injected water. For years I did not have a contact tank and used peroxide. I was convinced to switch last fall and install the contact tank but have nothing but problems with bleach.
I was lied to by the salesman/manager who had me do the switch and he is no longer with the company. Even the tech doing the work tried to talk me out of it.

 

[Reach4]

I don't really know the answer to what you are asking. I did not even know that swapping carbon was needed.

When you put in new carbon, it is important to let it soak, and for the first long backwash, limit the rate with a valve initially. Read up on that. And when you do backwash, it will be much longer than a normal backwash, because there will be a bunch of fines you need to expel.

I did want to suggest that you have a sampling faucet before the carbon that lets you measure the residual H2O2 before the carbon. I think something around 4 ppm would be good -- certainly more than zero.

After you get things going, I would think a well and plumbing sanitizing would be a good idea. Well sanitizing is a nicer in hot weather, except that you are going without water in the house for an extended period.

 

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[Nightowl66]

I don't really know the answer to what you are asking. I did not even know that swapping carbon was needed.

When you put in new carbon, it is important to let it soak, and for the first long backwash, limit the rate with a valve initially. Read up on that. And when you do backwash, it will be much longer than a normal backwash, because there will be a bunch of fines you need to expel.

I did want to suggest that you have a sampling faucet before the carbon that lets you measure the residual H2O2 before the carbon. I think something around 4 ppm would be good -- certainly more than zero.

After you get things going, I would think a well and plumbing sanitizing would be a good idea. Well sanitizing is a nicer in hot weather, except that you are going without water in the house for an extended period.

I'm not swapping carbon. I just know that peroxide and bleach can't be mixed. When I switched from peroxide to bleach the company was going to take the filter back to the shop and flush, instead they re bedded at my house. I am just trying to find out if backwashing with straight sulfur well water will be OK.

 

[letusmaster]

Yeah, your plan should work fine. Flushing the system with sulfur water once (just to clean out the chlorine) won’t hurt anything long term, especially since you’re draining it again before switching to peroxide. I’d definitely run a couple full regen/backwash cycles on the carbon filter to make sure the chlorine’s out. Honestly, peroxide is way easier to manage than bleach in most systems, been using it for years without the headaches. Sounds like you’re on the right track getting back to what worked.