sediment from pipes or the tank


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Old 11-29-17, 02:13 PM
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sediment from pipes or the tank

Hi
Have Buderus 80g water heater / tank
If after a few days I draw a tub of water there is black sediment in the tub. Not a lot but enough to be annoying..
If I immediately draw another tub there is no sediment.

Does this indicate
1) sediment is in the pipes
2) sediment is in the first water from the tank
3) neither; something else

Thank you
 
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Old 11-29-17, 02:17 PM
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When you say tub, do you mean bathtub? Do you see the sediment anywhere else besides that one faucet?
 
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Old 11-29-17, 02:21 PM
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ah so, thanks

yes, bathtub

will wait a few days and then try other spots
 
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Old 12-01-17, 06:34 PM
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How old is the house? Do you have galvanized steel pipes?
 
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Old 12-02-17, 05:29 AM
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Do you know how old the water heater is? If not, post a pic of the data plate or list the serial number and manufacturer and we can tell you the age. Assuming the heater has some age on it, it's very possible the sediment is coming from the tank, but that's not certain yet. As Joe said, do you know what type of water piping you have? Are you on city or well water?

Also if you water heater is older, you may want to buy a new water heater as soon as possible. Even if you don't install it right away. 80 gallon electrics are no longer made and there is no substitute, at this time. If you have room you can throw two 40 gallons side by side (I would just do two 30 gallons in series to save room), but if you don't have the room for that you don't have a lot of options (not to mention the fact that then you have 2 water heaters to leak in x amount of years).

But you can still usually find some 80 gallons locally that some box stores have left in stock, if you wanted to buy one now.
Ruud/Rheem also make a very nice 65 gallon and 75 gallon Marathon water heater, which is all plastic and has a lifetime warranty. Unfortunately, they too are going away, so you'd have to move quick to find one of those as well.
 
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Old 12-30-17, 12:22 PM
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Hi
Am back.

Recall this house is empty and so water not used regularly.

As for queries/comments

How old is the house?
House 40-50 years old.

Do you have galvanized steel pipes?
Have copper pipes where visible.

Are you on city or well water?
well

Do you know how old the water heater is?
Buderus ST 301 S/N 300-1-94-005 M

Now on to the findings
Appears to be just the tub spout. Cannot really get sediment from other places.
So would seem the tub spout is the culprit.

Had a plumber out, he said
You probably have a galvanized “nipple” just ahead of the tub and it sheds sediment if not used regularly. Could replace the “nipple” but too much risk, too much work. Just draw some water regularly and the problem will go away.
 
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Old 03-06-18, 04:41 PM
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Hi
so did this test
ran hot water from bathroom lavatory: little to no sediment
ran hot water from shower in tub; little to no sediment
ran hot water from tub spout; lotsa sediment
ran hot water from hot water tank; first ˝ gal had some but 2nd half gal had none
so would appear a little sediment everywhere but only lots from the tub spout
which supports the "galvanized nipple" theory
 

Last edited by engrav; 03-06-18 at 06:02 PM.
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Old 03-07-18, 05:37 AM
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I would bet you have mineral deposits forming inside the water heater. Well water often contains higher levels of calcium and magnesium which precipitate out of the water in the heater. You are likely only seeing it in the tub because of it's higher flow rate and it's the only thing that doesn't have an aerator screen. Drawing only a gallon of water from a water heater's drain valve is not a definitive test and it it has been a year since it's been drained then much of the deposits have really stuck together on the bottom and will not come out the drain.
 
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Old 03-07-18, 08:35 AM
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Ok
probably time to then have plumber
1) check tub for "galvanized nipple" and
2) clean hot water tank
thanks
 
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Old 03-07-18, 12:18 PM
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but a puzzle
Our well water is hard. But that usually leaves a white filmy residue. This sediment is particulate and brown.
 
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Old 01-27-20, 04:53 PM
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I think solved. Have old Buderus ST 301 indirect fired hot water tank and sediment in hot water.
Question was where is sediment in hot water coming from?

Had plumber open tank. Peered down inside. Saw lotsa debris at the bottom even tho flushed annually.
Finally obtained user manual. Indicates that after draining there will be 3 gallons left in the tank. So simple flushing will not cut it. Supposed to remove port cover at the bottom of the tank and drain last 3 gallons and clean the bottom. That has not been done for over 8 years.

Plumber was leery of removing port cover with no new O rings, etc so did a wet vac and voila. Debris if not gone is markedly reduced.

Seems answer to the question is debris in the tank from poor annual hygiene.
 
 

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