Re: sulfur smell hot water
Posted by Gary Slusser on January 25, 2004 at 12:50:03:
In response to Re: sulfur smell hot water
: We have sulfur water coming from our 400' deep well (so do all the neighbors) We use chlorine injection and 2 large storage tanks to neutralize the smell. Then the water goes through a carbon filter to remove excess chlorine, then a water softener. My problem is we still have a bit of a sulfur smell in our hot water. Occasionally the bleach runs out, and sulfur water goes into the pipes. I thought maybe sulfur bacteria go into our hot water tank and were living there. So we turned the tank temp up to 140 for 1 day, then drained the tank. Then I bypassed the carbon filter and let chlorinated water fill the tank and ran the water through all faucets on the hot and cold side. Then we waited about 8-9 hours then redrained the tank and turned the carbon filter back on and flushed all the lines. The hot water seemed much better for a few days, now it has a slight sulfur smell again. The carbon filter did its weekly backwash sometime during those few days.(I don't know if that has anything to do with it) Any ideas why we would have this chronic mild sulfur smell in our hot water? By the way we did remove the anode a long time ago, but hasn't seemed to make any difference. One other thing-after we drained and refilled hot water tank, black water came out of the faucets when they were first turned on. It quickly cleared up.
: Thanks in advance for any help.

Th odor and black sludge is caused by bacteria that aren't, or weren't killed by your chorination due you allowing the solution to run out and probably weaken substantially befre it ran out. That allowed the bacteria to colonize your carbon filter. When you put it back on line after running chlorinated water into the water heater, the bacteria in the bed recolonized the heater and the odor returned.

You need the carbon replaced, the retention tank, filter and softener sanitized before adding the new carbon. The heater has to be drained, flushed and sanitized at that time too. I suggest the retention tank be drained, flushed and sanitized too. And I don't know that you can do that with the solution feeder unless you over chlorinate with it and then drain the retention tank when you are ready to put it back in service.

Of course then you need the solution feeder set up and working correctly while the solution strength is correct or all this effort is not going to gain you anything. The only way to know it is workign correctly is water tests for free chlorine.

I suggest a water treatment dealer be brought in to do this.

Quality Water Asscoiates

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