Question about Bosch AquaStar Indoor Natural Gas Tankless Water Heater with Vent Hood #125

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My water valve is leaking on the AQ125BNG does anybody know what the model number is for the water valve?

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  • Anonymous Apr 13, 2009

    yup, mine too!  what can we do?

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If it is leaking behind the handle take the nut off remove the handle and tighten the packing replace the knob and your done,, good luck

Posted on Jun 06, 2009

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I bought a AQ125BNG from my neighbor and when I read the instructions it says to use a gas pressure regulator on the AQ125B but I dont know if I need it on my AQ125BNG too is not that clear. I will ap


The NG at the end of the model # means natural gas. If you have a nat gas meter outside on your home, the regulator is already there. If you have propane gas for your home, then the control and the appliance needs to be converted to propane, if the conversion kits are available. Call the manufacturer if you have any doubts.

Sep 12, 2014 | Water Heaters

1 Answer

How do I re seal around the pressure release valve on a ge8s06aag water heater


The model number you have doesn't match anything and you don't say exactly where on the valve it is leaking so you are going to get my straightup advice. If the valve is leaking around the pin or lever it probably should be replaced for safety purposes. On the off chance that it got fiddled with by accident, or the tank is pretty old and has gotten corroded or you have mineral deposits, you can flush it.
Make sure the discharge pipe is properly connected and will discharge hot water outside safely, raise the lever on the release valve, by pulling the lever to the up position, make sure water is flowing out the discharge pipe and then re-close the valve by lowering the lever back to the flat position, flat side down. Be careful the lever may have gotten a little warm. If it is still leaking around the pin, it needs to be replaced. If the valve is leaking from the base where it attaches to the tank, the discharge pipe will have to be "sweated" off, the valve removed and re-doped which is not usually a job for a homeowner.

Sep 11, 2014 | Water Heaters

1 Answer

Installed a tankless gas hot water heater a few months ago, and ever since then when ever I turn on the hotwater, I get pockets of air coming out of the faucet. There are no leaks in the water lines, but...


1) Never, ever install tankless water heater, unless your wallet is 2" thick and you enjoy nuisance problems and recommended continual maintenance.
2) Add in-line air vent.
http://waterheatertimer.org/images/Air-vent-added-to-return-22.jpg
3) Look for check valve along the line. Look for mixing valve, pressure regulating valve, etc.
4) If you have recirculation system, remove cross-over check valve and see if problem is located there.
5) Contact Rheem. 800-432-8373 They will want model number, serial number, and name of installer. And might recommend contacting installer or plumber.
6) Increase water flow. Check water flow requirement of tankless (.5 gallons per minute activation) with actual flow at faucet.
7) Clean water filter at tankless unit.
http://waterheatertimer.org/pdf/Tankless-maintenance.pdf
8) Crossover at single-handled faucet.
http://waterheatertimer.org/Crossover.html
9) Fix all leaking faucets indoor and outdoor so no air is being sucked in.
10) Bad TP valve on water heater sucking in air each time water pressure pulls on the valve?

Additional resources: No information about air-in-line
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Sep 20, 2011 | Rheem Paloma PTG-74XP / RTG-74XP Liquid...

2 Answers

Vacuum valve leaking water


Question is unclear.
What is a vacuum valve?
You posted under electric water heater.
Water heaters are associated with TP or 'safety overflow' valve, water shut-off valve, tank drain valve, pressure-regulating valve, mixing valve and possibly a few other plumbing valves.
Vacuum valve implies that a compressor is creating pressure on one line while creating vacuum on another line. I don't know of a water heater that uses air compressor.
Open following link to help troubleshoot leaking water heater:
http://waterheatertimer.org/Leaking-water-heater.html

Jul 23, 2011 | Rheem 40 GAL ELEC TALL Water Heater 6YR SC...

1 Answer

Drain valve leaking. Gor replacement part. Cannot get old valve off . Does the whole valve come off , unscrew or pull off? serial number is RN1296A 18392. Will the new part fit the same New...


If valve is dripping, buy garden hose cap and screw onto valve.
Whole valve unscrews counterclockwise.
If valve is plastic, expect it to break off.
If valve is brass, use cheater bar on your pipe wrench.
I don't know that serial number or part number, but drain valves are standard 3/4" pipe thread.
http://waterheatertimer.org/How-to-replace-water-heater-drain-valve.html

Drain valve can be rusted in place and impossible to remove without draining tank and putting water heater on it's side.
Install new water heater so drain valve is accessible, and buy new water heater with brass valve instead of plastic.

Jun 15, 2011 | Rheem Water Heaters

1 Answer

G'day, model number 311170n0 is constantly leaking


If you are on city water and your inlet to your house has a back flow preventer this could be you problem.if so theres an expansion tank that can be installed on the cold water line,after you water warms up theres no room for expansion and the relief valve goes off at 150 psi

Jan 17, 2011 | Rheem Water Heaters

1 Answer

Hi, first of all, HAPPY HOLIDAYS! now...I was given a Bosch AQ125BNG in need of some repair but I want to convert it to LPG gas, can this be done? I am having a heck of a time even locating the LPG valve...


Happy Holidays to you too.
You will also need to change the
Burner
Nozzle
Pilot injector and the
Gas regulator in order for the unit to function properly. You might try running a ad on CraigsList. If you cannot find one for free, you may end up spending more money then the unit is worth. You could also put the word out with local plumbing companies that replace these heaters to look out for a used one. Some one out there has to have one those laying around.

Dec 19, 2010 | Bosch & Tankless LP Hot Water Heater

1 Answer

Pilot lighting


1) Open the door on the bottom of the tank to show the burner. 2) Turn the valve to "pilot" and depress. 3) Light the match, (best if you have a candle/grill lighter), and follow the skinny copper tube from the valve to the burner inside (this is called the thermocoupler). At the end of it, you will see the pilot. 4) Once pilot is lit, keep valve depressed for a minute (this warms the thermocoupler, thus sending a signal to the valve saying the pilot is lit). 5) Let go of the pilot button (usually red). 6) If pilot stays on, put the door(s) back on and turn the valve to "on". You will hear/see the gas ignite when complete. Good luck!

Dec 28, 2009 | Rheem 50 Gallon FVR NATGAS Water Heater...

1 Answer

Bosch AQ125BNG Burner goes out even though the


Often, this is the result of a restriction of exhaust gases. This type of hot water heater must be adequately vented, (per installation specs). I found this out after taking a number of cold showers. :^( Two years later, and still counting, no more problems. :^)

Jul 11, 2009 | Bosch Water Heaters

2 Answers

Bosch AQ125BNG gas water heater


First thing I would do is clean and rebuild the watervalve. The watervalve on this heater mandates everything. This watervalve has a maintenance schedule in the manual. She be rebuilt every 3 years. Also sounds like the diaphram in the watervalve may be damaged.

Dec 13, 2008 | Bosch AquaStar Indoor Natural Gas Tankless...

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