Thank you to all the plumbing professionals who offer their advice and expertise
Welcome to Plbg.com

Over 545,000 Posts in over 160k Threads

Welcome to Plbg.com (aka: PlumbingForum.com) we are the most popular plumbing information sharing, advice, DIY and educational forum on the Web. Ask any toilet, sink, faucet, pump, water quality, and plumbing related questions. Please refrain from asking where to purchase a product, business, pricing, or legal questions, for contractor referrals, or any questions not related to plumbing. Keep all positive and no advertising. Our largest sponsor and best online plumbing supplier is: Buy plumbing supplies online 

Post New
Search
Log In
How to Show Images
Newest Subjects
 Black Soot/Sand in Bathtub Hot Water
Author: Grover (CA)

For awhile I have had black soot/sand coming out of the hot water side of the bathtub and bathtub only, all other faucets, kitchen, bath room sink etc all seem fine and it's only on the hot side. Has a gas hot water heater that is almost 10 years old, all water lines are copper and all interconnect under the house, is it the hot water heater or?

Thanks

Jamie

Post Reply

 Re: Black Soot/Sand in Bathtub Hot Water
Author: hj (AZ)

Rub your finger across the "soot", if it leaves a black trail it is magnesium sulfide usually caused by a reaction between the magnesium anode in the water heater and soft water.

Post Reply

 Re: Black Soot/Sand in Bathtub Hot Water
Author: Doug E. (CA)

would this mean you would replace the sacrificial anode made from a different metal? and why as she claims is it only coming from the shower and not all other fixtures?

Post Reply

 Re: Black Soot/Sand in Bathtub Hot Water
Author: Grover (CA)

It does leave a trail, almost grease like, how can I tell what it is, plus the water I believe is hard water and not soft as isn't most water srtaight from the supply source hard? Do I need to replace the water heater?

Post Reply

 Re: Black Soot/Sand in Bathtub Hot Water
Author: hj (AZ)

From that I assume you do not have a water softener. If not, then replacing the anode rod and draining the tank, MAY eliminate the problem but maybe not immediately.

Post Reply

 Re: Black Soot/Sand in Bathtub Hot Water
Author: smellslikemoney (AL)

She peobably is only noticing it in the shower because she runs a high volume of water at once,which really "stirs up" the water heater and the shower is probably white. So its happening everywhere she just doesn't see it. I'd change the water heater if its old and the anode is gone. I wouldn't throw good money at bad. It may correct the problem until the water heater craps out in 2 months,but then your re-doing that work when you replace the heater. Some heaters are easy to replace....others depending on site conditions can be a nightmare. get estmates on replaceing the water heater vs. replacing the anode rod.

Post Reply

 Re: Black Soot/Sand in Bathtub Hot Water
Author: Grover (CA)

The water heater is almost 11 years old so maybe it is time to replace it.

Post Reply

 Re: Black Soot/Sand in Bathtub Hot Water
Author: smellslikemoney (AL)

BINGO! check on a replacement cost

Post Reply

 Re: Black Soot/Sand in Bathtub Hot Water
Author: rk15 (CT)

Hey,
I have a 20 yr old therma flow steel tank, actually make it 23 yr old water heater and I did replace the anode about 5 yrs ago I believe, does this mean it is time for me to change the water heater too. just curious as you said if it is 10 yr old then probably needs chaging. I am asking this as the next time it requires repair or malfunction should I just look @ replacing instead of repairing.

Thaks in advance

Post Reply

 Re: Black Soot/Sand in Bathtub Hot Water
Author: smellslikemoney (AL)

Any appliance 23 years old I'd probably replace it. Energy costs if nothing else. However I did find a 29 yr old rheem electric 30 gal water heater a few months back. It was working perfctly. I replaced it anyway. IT had no saftey pan. i installed the saftey pan,expansion tank,and a new water heater. Thats the story!

Post Reply

 Re: Black Soot/Sand in Bathtub Hot Water
Author: dlh (TX)

10-15 years is the expected life of a tank water heater

yours is living on borrowed time. i have not seen many heaters older than yours

- - - - - - -

PLUMBERS "Protecting The Health Of The Nation"

Post Reply

 Re: Black Soot/Sand in Bathtub Hot Water
Author: smellslikemoney (AL)

Some "DAY AND NIGHT" brand water heaters lasted over 40 years!!!! check it out...ask some people!

Post Reply

 Re: Black Soot/Sand in Bathtub Hot Water
Author: rk15 (CT)

The plumber as well as the oil service guy who was here for the boiler cleaning when asked should I change the heater said leave it alone and address it when needed. I was all said to replace the boiler a AO SMith of the same era. In fact he disuaded me both last yr ad 5 yrs ago from changing both and said to change the target wall as well as the coil and the anode in the heater at that time. My thoughts were the same that although it would initially cost more but I would recover some money in energy savings with oil being so expensive

Post Reply

 Re: Black Soot/Sand in Bathtub Hot Water
Author: smellslikemoney (AL)

In whos best intrest would it be for you to keep the old one? Yours or the plumber/oil guy? If you installed a new one ...you would be seeing both of those guys less. never let anyone install equipment they dont service also.

Post Reply





Please note:
  • Inappropriate messages or blatant advertising will be deleted. We cannot be held responsible for bad or inadequate advice.
  • Plbg.com has no control over external content that may be linked to from messages posted here. Please follow external links with caution.
  • Plbg.com is strictly for the exchange of plumbing related advice and NOT to ask about pricing/costs, nor where to find a product (try Google), nor how to operate or promote a business, nor for ethics (law) and the like questions.
  • Plbg.com is also not a place to ask radiant heating (try HeatingHelp.com), electrical or even general construction type questions. We are exclusively for plumbing questions.

Search for plumbing parts on our sponsor's site:




Special thanks to our sponsor:
Buy plumbing supplies online


Copyright© 2015 Plbg.com. All Rights Reserved.