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Disconnected condensation drain on hot water heater.

I had my home inspected and it was determined that the "condensate drain line is disconnected from the nipple on the water heater flue pipe." What exactly am I looking for to attach the drain line/tube back to?

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  • Water Heaters Master
  • 5,245 Answers

Tankless or hybrid water heater?

Tankless gas must have special fitting between water heater and vent that has a condensate line fitting. Hot toxic vent gasses traveling up vent pipe cause acidic water vapor to form inside vent pipe that drips back down vent and drips onto heat exchanger and other parts eventually burning hole through expensive metal alloy heat exchanger, rendering tankless computer water heater useless after electric circuitry gets wet and shorts out.

Hybrid or heat pump type computer water heaters must have condensate drain connected to catch pan located just above storage tank and below compressor. Condensation can form on condenser coils and drip into catch pan where there is primary and secondary drain

Read product manual

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Posted on Apr 18, 2014


6 Suggested Answers

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

  • 185 Answers

SOURCE: I have a 40 gal

You will need an amp meter. I suspect that the lower heating element is out or the thermostat.

Most water heater have a upper and lower element. The bottom is the main work horse.

Take the lower access door off and you can get to the wires to use a clamp on Amp meter. You should get a reading of 10 + amp if it is working. You can check the thermostat with the volt meter also to make sure you are getting voltage to the element . You should have 220 volts across the two wire attached to the element. The elements are not to hard to change. You will need to shut the power Off and the Cold Water off. Drain the tank to get below the bottom element and you will need to get a special wrench to unscrew the old element out of the tank. Hope this Helps

Posted on Jan 02, 2011

Testimonial: "Thanks for the promt reply, I had the feeling it might be that but did not know how to find out. Thanks again"

  • 52 Answers

SOURCE: i have a 250SX aquastar bosch tankless hot water

The 250 MUST have the condensate line connected. EC comes from gas supply problems and CO2 levels not being adjusted. LP units require 3/4" smooth gas pipe or 1" corrugated pipe minimum size. The LP regulator needs to be turned up to about 13 inches of water column and with all the gas appliances on, measure no less than 11 inches of water column. The CO2 levels must be measured by a qualified gas technician with a calibrated (with in 6 months) CO2 analyzer.

Posted on Apr 11, 2010

  • 359 Answers

SOURCE: Water heater ground

run to breaker panel or drive a 8ft ground rod and connect to it the water line is no longer acceptable as the public utility's are using pvc for gas and water now and this is no longer a practice you could use the ground rod that is already installed on your service and use connector , but something you might do well to check is to make sure in the process of installing the plastic pipes the ground going to the panel was not also disrupted if so you will need to install 2 8ft ground rods at least 6 ft apart and daisey chain together with proper size ground wire . # 4 solid for 200 amp and # 6 solid for 100 amp service , I would make sure the panel ground is solid very important for safety ,, let me know if i can further assist

Posted on Feb 07, 2009

  • 39 Answers

SOURCE: I have a 50 gallon

The accumulation of condensation in the vent piping is more than likly the problem. I am guessing the vent piping is either 3-inch or 2-inch. You need to splice in a "T" fitting reduced down to 3/4-inch with a 3/4-inch tubing attached and run this to a sutible drain. This will drain the condensation elimiating the accumulation in the vent assembly. Install this "T" fitting about 3-feet down stream from the vent motor.These supples and fittings can be found at a Home Depot or Lowes store.

Posted on Jan 27, 2011

SOURCE: I have a Bosch AquaStar

Tankless should never be installed with plastic pipe, PVC or CPVC etc.

Before calling service technician, open following link for Bosch tankless troubleshooting resources, including Bosch contact information, typical manuals, error codes, tech support, parts, fuel-saver calculator, service bulletins, water heater forum, fixya links, disclaimers, and links for finding service technician.

Read manual cover to cover, make sure tankless receives yearly maintenance as outline in manual.

Add a comment with your experience so others with same-similar problem can benefit.

Also take advantage of fixya expert assistance live.
For a price, expert works with you while you work on water heater or any do-it-yourself project.
Fixya is always less expensive than a service call.

Posted on Apr 02, 2011

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Code 11. had hot water last night

Code 11 is for no ignition.
Here is what I find:

Check that the gas is turned on at the water heater, gas meter, or cylinder.
Ensure gas type and pressure is correct.
Ensure gas line, meter, and/or regulator is sized properly.
Bleed all air from gas lines.
Verify dip switches are set properly.
Ensure appliance is properly grounded.
Disconnect EZConnect™ or MSA controls to isolate the problem.
Ensure igniter is operational.
Check igniter wiring harness for damage.
Check gas solenoid valves for open or short circuits.
Remove burner cover and ensure all burners are properly seated.
Remove burner plate and inspect burner surface for condensation or debris.

IF it has been working fine and now it isn't, I would suspect an ignitor problem.

Nov 29, 2014 | Rinnai RL94iN Natural Gas Tankless Water...

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Hot Water Pressure from taps

Hard water deposits from the water heater in the supply lines to the faucets. Sounds like your water heater needs to be cleaned out -- not just drained of water. You need to get inside and clear out the deposits in the bottom of the tank. You also need to remove the hot water supply lines to your faucets and see of you can get the lines to run free from the deposits -AFTER you clean out the water heater. Remove the drain -put on a 3/4 in. ball valve for the drain and a hose bibb on that - you can hook up a 5/8 - or 3/4 inch hose to get the particles out of the drain of the water tank. You may have to blow back the water line, from the faucets, the hot water lines- to get the deposits out of the water lines. You also may have to blow out the faucets with the water line disconnected to clear the calcium out of the hot side of the faucet.

Feb 18, 2014 | Water Heaters

1 Answer

Burner time reset.

Are you sure you have an NR71? or is it an NRC model? only NRC models should be getting that code. Anyways, your house water treatment system has nothing to do with the neutralizer. The Neutralizer that it is telling you to replace is not there to treat the water going to your house. It is neutralizing the acidic condensate produced by the exhaust in your "condensing" unit. Without a new Neutralizer the condensate that drains out the bottom of the unit will be strong enough to kill plants and eat away very slowly at some items or metals underneath the skinny condensate drain. It's not a big deal unless you have the unit sitting above something you really care about and there's no condensate drain pipe attached. Either way, if you buy a new Neutralizer it comes with instructions on how to reset the timer so that you don't have to have the EC 92 bug you anymore.

Nov 14, 2013 | Noritz 7.1 Gpm Natural Ng Gas Tankless Hot...

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No condensate coming out of the condensate drain just blows out air

Call Rheem and they will recommend calling installer since tankless computers are non intended as do-it-yourself.
If condensate drain is blowing out 'air' do not forget this air is deadly poison CO gas and will kill you, first giving you a headache that goes away when you are out of house. Remove affected people from home and put into fresh air and lay on side, never on back or they will suffocate. Call 911 immediately and most will recover.
Copy following link for resources and required maintenance for tankless computers that heat water: scroll down to venting and manuals and review each to check how vent lines are set up, and that condensate line is set correctly. However this information is NOT guaranteed to match each model made by Rheem as they advance their product marketing strategy to exclude as much safety information as possible for do-it-yourselfers.
Condensate lines can clog over time. Clean line with compressed air, and soak in clorox, and swing around overhead to remove anything inside line. This line contains bacteria so do it in neighbor's yard.
Not all conditions produce vent condensate. Condensate might not form in vent line if weather is dry and the vent has good draft. But later when conditions change, condensate might begin flowing.
Condensate is caused from burning hydrocarbon fossil fuels in any gas appliance. But problem is bigger with tankless since these appliance consume so much fuel per heating event since tankless are required to heat water rapidly as water passes by in a pipe. This is why tankless require larger incoming gas line, and larger vent line made from specific materials for the vent.
Among the long list of poisonous by-products being vented outdoors into the air our planet breathes is acidic water vapor. If conditions are such that the vapor condenses before reaching outdoor, then the acidic water gathers in the vent line and rolls back toward the tankless computer, and goes down into the condensate drain and then down into your pluming drain where it can corrode pipes and add acid by-product to other environments.
If the acidic water is allowed to fall back into tankless heat exchanger instead of down condensate drain, then eventually it will chew a hole through the special nickle alloy heat exchanger (imagine the hole it will chew through household drain lines), and the surprise will not be evident for a few years until leak develops and the tankless exchanger must be replaced at great expense, plus repairs to shorted motherboard and electrical sensors.
Just don't install tankless computer water heater is best solution for myriad of problems, maintenance, and expense of owning a device that must immediately monitor incoming and outgoing water temperatures and flow rates, incoming gas flow rate and pressure, outgoing vent flow and pressure, interact with a remote control device, while monitoring burn rates and combustion temperature using a computer motherboard that is not protected from line interference or power surge, etc
Just install tank-type heater:

If you need further help, I’m available over the phone at

Aug 18, 2013 | Rheem RTGH-84DVP Condensing Tankless Water...

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What do I have to do to drain and disconnect GG40T6A model

1) Copy following link for installing new gas water heater, and use steps to move water heater, and then re-install.

2) Don't forget to tape plastic bag over disconnected gas connections to keep from getting dirty.
Dirt in the gas line, or on the threads can cause gas control valve to malfunction.

If you need further help, I’m available over the phone at

Mar 08, 2013 | Water Heaters

1 Answer

Where is the drain pan located?

Sometimes there is no condensate.
Sometimes the drain line is clogged.
Copy following links for GE Heat Pump water heater.
Expanded drawing of 2012 GE heat pump condensation drain reservoir
Clean the drain line by swinging over head.

If you need further help, I’m available over the phone at

Sep 11, 2012 | Water Heaters

1 Answer

I have a 50 gallon Richmond Power vent water heater. The burner would try to light but would not. I replaced the vacuum switch, but this did not solve the issue. The tygon tube that runs from the vacuum...

The accumulation of condensation in the vent piping is more than likly the problem. I am guessing the vent piping is either 3-inch or 2-inch. You need to splice in a "T" fitting reduced down to 3/4-inch with a 3/4-inch tubing attached and run this to a sutible drain. This will drain the condensation elimiating the accumulation in the vent assembly. Install this "T" fitting about 3-feet down stream from the vent motor.These supples and fittings can be found at a Home Depot or Lowes store.

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2 Answers

My reliance sta-kleen 502 is leaking. The water is dripping on top of the pilot light, extinguishing the flame . Please advise me with step by step instructions to diagnose and attempt fix this myself....

If you have a leaking water heater there is a serious problem.
Page shows how to limp along on a leaking water heater if your water heater needs replacement.

One of three things is causing the water:
1) Loose water connection on top of tank that is dripping down inside tank >> check pipes on top of tank.

2) The vent is clogged or not working correctly causing condensation inside flue pipe.
Condensation water is dripping back down inside tank.
Problem means possible CO poisoning if gas is not venting.
Look at vent pipe to see if joints are corroded.
Use long fireplace match > light match and put into draft hood at top of tank and see if smoke goes up.
Put hand at draft hood opening when water heater turns on to see if vent gas enters home.
Do same test when furnace turns on to see if furnace vent is pushing back into water heater.
Does water heater vent inside same pipe as furnace? You may need to set up separate vent for water heater if furnace gasses are pushing back into home.
Check furnace vent for obstructions.
Look at vent stack top of home to see if hood is in place.
Check if bird nest is built inside warm vent pipe.
Improper flue is top priority for getting fixed so vent gasses properly escape home.
You may have to call a plumber.
Professional plumbing forum:

3) Your water heater is rusted out.
A rusted tank has to be replaced.
It cannot be repaired.
However, before replacing tank, you do not want a tank failure where tank ruptures and water runs inside home until water is shut off.
This will cause major damage.
Protect yourself first.
Turn off water valve above tank.
Move gas knob to 'pilot' so burner is not heating water.
Open tub spout on hot side to relieve pressure on tank so it will not rupture.

Now you're protected.
Link above shows how to limp along on failed tank until you can replace heater.

You need a new gas water heater from Lowes or Home Depot
Look at label on side of you tank for gallons and btu's of your water heater.
Measure height to flue pipe so you get same height water heater, so pipes don't have to be changed.
You need a pipe wrench and teflon tape which will be wrapped on each pipe thread when pipes are reassembled.

Step1) Drain water heater using valve at bottom of tank.

2) Turn off gas valve going into heater.
When gas valve is perpendicular to gas line, then gas is off.
Dissemble gas line to water heater.

3) Disconnect flue pipe and support flue pipe with wire so it doesn't not fall down. Flue pipe joints should be held together at each joint with 3 screws.

4) Turn off water. Shut off valve is on COLD side.
Disconnect water pipes.

5) Move old water heater out of way.

6) Set new water heater in place. Put water heater in drip pan.

7) Connect water pipes >> cold goes to side marked cold.
Hot to hot.
Buy new flexible water connector pipes at home center for easy installation of water pipes.

8) Connect gas line exactly as it was connected before.
Home center sells flexible gas line connector for easy installation of gas line.
To test for gas leak after installation, mix liquid soap with water and put around gas line joints to see if there are bubbles.
Natural gas has less pressure than water lines, so gas pipes are easy to seal with ordinary wrench.

9) install TP pipe that runs to floor. Use old one off old heater.

10) Fill tank completely with water until water is coming out of tub spout.

11) Turn on gas, and light pilot as shown in manual.
New gas heater sometimes have small water leak when first fired up, so ignore a bit of water.

12) Save water heater manual like it is gold, and read everything in manual.

Dec 18, 2010 | Water Heaters

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