Question about Rheem EcoSense by 7.4 GPM Outdoor Tankless Water Heater Natural Gas

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What size recomended the gas pipe for rheem ecosense by 7.4GPM oytdoor tankless water heater

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1/2 inch if you are using steel pipe (which is the most hearty for outdoor installations).

Happy installation:)

Posted on Aug 22, 2010

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Posted on Jan 02, 2017

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I have a ecosense tankless water heater #rtg-74pvn-2 how far can i take the vent


Feb 2013
1) Rheem/EcoSense tankless product manual does not have specifications for length. Error 11 will let you know if venting is improper.
Often, tankless are installed outside because unobstructed venting is key for combustion of the amount of gas coming out of 3/4" gas line.
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

2) Copy following link for Bradford White venting: Exactly same as Rheem, but more installation detail. No maximum lengths given.
For lengths greater than 5 feet, a condensate trap must be installed. Acidic water from hydrocarbon combustion will damage metal, and destroy heat exchanger inside tankless if water drips back into unit.
http://hometips.me/Tls/Venting-Bradford-White-tankless-gas.pdf

3) Copy following link for tank-type power vent tables:
Generally, the longer distance requires larger vent diameter, and there is max number of elbows and/or air-flow restrictions.
http://hometips.me/Mar/Bradford-White-Power-Vent%20-tables.pdf

4) Otherwise call Rheem/EcoSense, and add comment saying what resources they offer.

Mar 06, 2013 | Water Heaters

1 Answer

What does error code 13 mean?


1) Copy following links for Rheem tankless error codes
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html
http://waterheatertimer.org/pdf/Tankless-Error-code-13.pdf

2) Maintain water heater as shown in product manual to avoid common error codes.

Dec 28, 2012 | Rheem EcoSense by 7.4 GPM Tankless Water...

1 Answer

Error code c7 and 12 on an ecosense natural gas water heater


Before calling service technician, copy following link for ecosense tankless troubleshooting resources.
C7 is communication failure with remote, and C12 is flame failure.
Multiple error codes could mean bad circuit board, loose wire, low gas pressure, or simple communication problem with remote control.
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Jul 24, 2012 | Rheem Paloma PTG-74PVN / RTG-74PVN...

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Have an Ecosense Tankless Water Heater with error code C7. It then flashes to 76 degrees and gives cold water. How do we remedy?


Before calling service technician, open following links for troubleshooting resources and typical manuals.
http://waterheatertimer.org/pdf/Rheem-error-code-C7-76.pdf
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Tankless water heaters require yearly maintenance.
Many causes for common error codes are covered in the yearly maintenance.

Jul 18, 2011 | Rheem EcoSense by 7.4 GPM Tankless Water...

1 Answer

Water and gas pipes size


if you go to rheems web sit it witll give you video instructions for install. but it will be 3/4 " gas and water in

Mar 14, 2011 | Rheem EcoSense by 7.4 GPM Tankless Water...

1 Answer

How can I tell how many BTU's my natural gas meter is rated to supply? I'm getting an error code 12 on my Rheem EcoSense 9.5 GPM 199,900 BTU Natural Gas Indoor Tankless Water Heater, so I'm guessing the...


The easiest way is to add up total of all gas appliances in house, using information from each appliance label.
Measure diameter of pipe at meter.
Call gas company and ask them if you need larger pipe and/or meter coming into house.

Following pdf has calculations for figuring:
http://www.gpta.net/Classes/Gas%20sizing/Gaspipe%20Sizing.pdf

Feb 03, 2011 | Rheem EcoSense by 7.4 GPM Tankless Water...

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10 minutes into my shower i get a spurt of cold water... whats wrong


check your gas pipe size and make sure it can keep up with the demand. also check your filter to make sure it's not clogging off with debris

Oct 01, 2009 | Rheem EcoSense by 4.2 GPM Tankless Water...

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