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View Full Version : Black Specks - AGAIN



foxhome01
12-16-2008, 04:05 PM
I posted a few months ago about black specks we were seeing in our dishwasher, showers and tubs. Based on my research it seemed to have boiled down to either the expansion tank or the anode rod. We've since had both replaced. I even called our City Water and they said that they've had people over the years say the same thing and it was their expansion tank.

Sadly, they seems to be back. I've noticed them in the dishwasher again. Same thing that happened last time - we'd randomly see them and then all of a sudden they were all over the place.

I have no idea what else there is to do. Someone had suggested that perhaps it's the water itself and that maybe we'd need a filtration system. If that's the last option, is that honestly going to resolve our issue?

What's the average cost?

Any other recommendations?

99k
12-16-2008, 04:37 PM
The first step is to have a chemical analysis performed on your water by a professional lab. Expect to $65+. Otherwise you are just guessing at the problem

jimbo
12-16-2008, 04:41 PM
Do you have black nylon braided flex connectors on the water heater??

foxhome01
12-16-2008, 04:44 PM
Do you have black nylon braided flex connectors on the water heater??


How would I identify that? Not sure what this is.

srdenny
12-16-2008, 04:44 PM
Does your water utility use chloramine as it's primary disinfectant? If so, the black specks could be coming from rubber washers, rubber gaskets, or the rubber diaphragm on an expansion tank. Chloramine attacks rubber.

foxhome01
12-16-2008, 04:47 PM
The first step is to have a chemical analysis performed on your water by a professional lab. Expect to $65+. Otherwise you are just guessing at the problem

I am planning to have someone come to the house to take a sample and have it tested. When this was originally looked into the plumber took a sample and sent it out. They claimed high levels of iron in the water and suggested that it's reaction with the anode rod was likely the cause.

Redwood
12-16-2008, 07:10 PM
And when you replaced the anode rod you put in a nice new magnesium anode rod? :rolleyes:

foxhome01
12-16-2008, 09:24 PM
And when you replaced the anode rod you put in a nice new magnesium anode rod? :rolleyes:

yep, we did.

Redwood
12-17-2008, 03:34 PM
Well if the black flecks are Magnesium Sulfide which is caused by your water reacting with the Magnesium Anode, You need to install an Aluminum Anode to stop the chemical reaction.

foxhome01
12-17-2008, 05:23 PM
Well if the black flecks are Magnesium Sulfide which is caused by your water reacting with the Magnesium Anode, You need to install an Aluminum Anode to stop the chemical reaction.

I went and checked the receipt and it was in fact an aluminum anode. So, I have a brand new aluminum anode and an expansion tank. Neither have seemed to fix my problem.

Gary Slusser
12-18-2008, 06:41 PM
If you have any braided SS flex lines, they are black rubber hose.

IMO black specs have nothing to do with the anode rod or the type of anode rod.

Do you have any black slime in the toilet tanks at or below the water line?

Is there any odor in the water and if yes, what does it smell like?

burleymike
12-18-2008, 07:05 PM
The water from my shallow irrigation well is full of iron and copper. Every year I get one or two sprinkler heads that loose pressure. The inlet screen will be all clogged up with what looks like coffee grounds. If you crush them they look slightly orange.

A few years ago I filled the kiddie pool from this well. I dumped some shock in the pool and went to bed. The next morning the pool was orange. It was fun to clean up.

After adding a chelating agent I had to vacuum out a bunch of tiny ornage and green beads.

Probedude
12-18-2008, 08:14 PM
If you have any braided SS flex lines, they are black rubber hose.

Just for reference, mine are not black hose inside but instead white/cream colored - like teflon or vinyl.

Gary Slusser
12-19-2008, 11:46 AM
Then get a water test for manganese. Galvanized pipe or nipples can cause black specs too.

Gary Slusser
12-19-2008, 11:49 AM
The water from my shallow irrigation well is full of iron and copper. Every year I get one or two sprinkler heads that loose pressure. The inlet screen will be all clogged up with what looks like coffee grounds. If you crush them they look slightly orange.

A few years ago I filled the kiddie pool from this well. I dumped some shock in the pool and went to bed. The next morning the pool was orange. It was fun to clean up.

After adding a chelating agent I had to vacuum out a bunch of tiny ornage and green beads.
You should have the raw untreated water tested for iron and copper.