Question about Rheem 40 Gallon FVR NATGAS Low WATER HEATER 6YR 22V40SF

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White sediment in the hot water

I recently developed a problem with the pressure from the hot water line. Upon checking the faucet filters I discovered a white sediment and removed it, but more keeps coming out. Seems to only come from the hot water side. My neighbor said they had this sort of problem just before the tank started an enormous leak. He said something inside deteriorated.

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  • Anonymous Mar 24, 2014

    cascade 40 white sand leaked out pf the drain when opened

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Replace heater-have u ever drained heater?turn off water supply-drain heater .try this a couple times.if u replace heater put water filter on incoming water.

Posted on Jan 08, 2009

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What can cause Hot/Cold spikes on an RTG74-XN


Crossover, low hot water flow, low water pressure, sediment in water lines or heater, heat exchanger needs to be de-limed, water filter needs to be cleaned, water heater temperature set too high, incoming water temperature too high or too low depending on model, MUD or PUD districts with pressure spikes, dirty faucet aerators, loose wires, bad sensor, faulty PD-board, bad venting, dirty burner and combustion parts, etc.

Crossover
http://waterheatertimer.org/Crossover.html
Clean water filter monthly, de-lime tankless yearly
http://waterheatertimer.org/pdf/Tankless-maintenance.pdf
http://waterheatertimer.org/pdf/Rheem-De-lime-tankless.pdf
No error code:
http://waterheatertimer.org/pdf/No-Error-Code.pdf
Overcoming fluctuating temperatures:
http://waterheatertimer.org/pdf/Bosch_Overcoming_fluctuating_temps.pdf
Resources:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Sep 20, 2011 | Rheem Paloma PTG-74XN / RTG-74XN Natural...

1 Answer

Heater takes more than 1 minute to get water to kit faucet , then temp fluctuates


1) Guesses: Sounds like a bad single-handled faucet cartridge, or low water flow at faucet, or clogged water filter.
Replace faucet cartridge, clean the aerator, and/or clean sediment out of pipes below sink, and clean water filter at tankless unit each month.

2) For exact measure of problem:
Typical faucet can have 2 gallon per minute flow rate.
2 gpm flow rate means faucet fills 1 gallon container in 30 seconds. Test faucet using 1 gallon container and a cooking timer to get flow rate.
Clean aerator to improve flow rate. Compare kitchen flow rate with other faucets in home.
http://waterheatertimer.org/Low-hot-water-pressure.html

Most homes have 1/2" diameter pipe running to kitchen faucet.
100 feet of 1/2" diameter pipe holds 1.2 gallons of water. This assumes no sediment build-up inside pipes.
http://waterheatertimer.org/Water-heater-recirculation-system.html

Assuming only hot is turned on: If faucet is 100 feet away from water heater, and pipe diameter is unobstructed 1/2" diameter, and faucet has 2 gallon per minute water flow, then hot water should arrive in 36 seconds.
50 feet away, and hot water should arrive in 18 seconds.

If kitchen has single handled faucet, and the handle is raised in the middle, then equal amounts of hot and cold water are drawn at same time. This doubles amount of time for hot water to arrive.

If single handle faucet has a bad cartridge, then faucet can have crossover.
Crossover means that cold water can enter the faucet even if faucet is turned to hot.
Bad single-handled faucet cartridge can delay or stop the arrival of hot water.
http://waterheatertimer.org/Crossover.html

Tankless require maintenance including cleaning combustion parts yearly, de-lime heat exchanger frequently, and clean water filter each month.
http://waterheatertimer.org/pdf/Tankless-maintenance.pdf
http://waterheatertimer.org/pdf/Bosch_Overcoming_fluctuating_temps.pdf
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Add a comment for more help.

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Sep 15, 2011 | Rheem Direct Vent Natural Gas Tankless...

1 Answer

Hi, I have the 1600 NG tankless water heater. Everything works great, but I installed low flow hot faucets throughout the house and now the igniter will not click on. It works for the washing machine. ...


http://waterheatertimer.org/Troubleshoot-Bosch-Tankless-water-heater.html#flow
1) Tankless require minimum flow rate before burner will activate.
2) Sounds like the water pressure drops quickly when faucet turns on. This implies combination of problems including sediment build up inside lines, crossover at single-handled faucet, or sediment filter clogged or water softener clogged.
3) Low flow faucets can reduce needed flow rate.
4) Other problems can contribute: sensor failure, loose wires, PC board failure, high temperature setting, cold incoming water temperature during winter months.

Jul 20, 2011 | Bosch 1600H-NG Natural Gas AquaStar...

1 Answer

What is this white crustie stuff coming from my water lines, and hiow do I fix it?


It is usually calcium-carbonate and lime.
Once the stuff gets into water lines, it can clog elbows and pipes and cause low water pressure.
If pressure is good, then clean out faucet aerators, and install water softener/filter
Generally a water-softener and filter can solve future problems.
http://waterheatertimer.org/Low-hot-water-pressure.html

If you have tankless water heater, then delime the unit:
http://waterheatertimer.org/pdf/Rheem-De-lime-tankless.pdf

If you have tank-type water heater, then clean out the unit
http://waterheatertimer.org/Clean-sediment-out-of-water-heater.html

Jun 18, 2011 | Rheem Water Heaters

1 Answer

Our gas water heater (Rheem Optima Quick recovery 81 series) heats the water as evidenced by the steaming water we can release from the temperature and pressure relief valve but we get no hot water from...


Sounds like a plumbing problem.

Since no tap gets hot water, chances are good the problem lies in the hot water pipes between the water heater to the first Tee.
Look for sediment lodged in water heater hot water pipe.
Or sediment lodged in elbow or Tee.

Other problems can be in play.
Faulty check valve or mixing valve if these are installed.
Faulty recirculation system if this is installed.
Also crossover at single-handled faucet where the cartridge is bad and lets the cold water flow into hot water pipe whenever another faucet is turned on. If you are getting cold water out the hot tap, and you know the hot water heater has hot water, then crossover is suspect > in addition to sediment blockage at hot water heater.

Upvote the help.
And take advantage of fixya expert assistance live.
For a price, expert works with you while you work on timer or any do-it-yourself project.
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May 15, 2011 | Rheem Water Heaters

1 Answer

Hi no hot water..........water pressure in the shower is little bit low


Before calling service technician, open following link for Bosch troubleshooting resources:
http://waterheatertimer.org/Troubleshoot-Bosch-Tankless-water-heater.html

http://waterheatertimer.org/pdf/No-Error-Code.pdf

Problems can range from sediment in tank, to clog in plumbing elbow, to degraded joint where copper and galvanized pipe meet, to crossover in single-handle faucet, to leak in water line, to leak in TP valve, to bad check valve, to defective re-circulation pump system.

Apr 09, 2011 | Bosch & Tankless LP Hot Water Heater

1 Answer

My hot water is not very hot and the water presser for the hot tap is really bad.


You can increase the temperature of your water by adjusting the water heater setting. As for your water pressure, the following could be the problem:

1) you could have a partially blocked aerator (on the end of your faucet)
2) You could have partially blocked pipes (due to sediment accumulation)
3) You could have a partially blocked water filter
4) You could have a defective water contaiment tank (if you have your own well).

Please remember to rate this solution. Thanks!

Feb 12, 2011 | Water Heaters

1 Answer

I am losing water pressure, but only on the hot side. Cold pressure is fine, as you add hot the pressure fades, the hotter the less pressure. This is at all points in the house. The water heater was...


You have a clog in the hot water line.
If problem is at one faucet, then remove aerator and clean, then disassemble lines underneath sink.

If problem is at every faucet, then that moves search close to water heater.
Look at hot water line that exits water heater and trace that line to first Tee.
Look at cold water line that enters water heater and trace that line to Tee.
Clog is located between those 2 Tees.

Buy pressure tester that connects to hose thread.
geno_3245_251.jpg
Connect pressure gauge to hot water heater drain valve.
Then conduct same test you did at faucet.
See if pressure drops at tank.

If pressure drops, then clog is on cold side of tank, and probably hot side too.
If pressure does not drop, then clog is on hot side of tank.

Suspect 1 is any place two different metals join. For example galvanized pipe and copper.
Suspect 2 is supply pipes that exit top of tank. Take apart and look inside pipes for corrosion and sediment lining pipe walls.
Suspect 3 is elbow. Disassemble pipes and look for sediment and flakes of rust.
Suspect 4 is all suspects above, each having sediment and corrosion.

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For a price, expert speaks with you over phone while you work on water heater or any do-it-yourself project.
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Jan 19, 2011 | Rheem 50 Gallon FVR NATGAS Water Heater...

1 Answer

When you turn the faucet to hot the water basically shuts off


Check the aerator to see if its full of sediment.  Also check the shut off valve to see if the hot water supply line is opened all the way.

Nov 24, 2009 | Water Heaters

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