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        posted
        I have 2 40 gal HWTs hooked up in series. can anyone tell me how that works? If the 2nd one quits working must all cold water be drawn to get to the hot in the 1st tank in line?
         
        Posts: 4 | Registered: Mar 01, 2014Reply With QuoteReport This Post
        posted Hide Post
        With two tanks in series, the tank closest to the taps needs to be working, the tank closest to the supply could be turned off. Is the tank closest to the taps is off you'll need to run out 40 gallons of cold water before you get anything resembling hot water.


        General Disclaimer

        Any advice given here is general in nature and is not necessarily valid for your given area. If in doubt check with your local codes enforcement department for what is required when doing electrical, plumbing or structural work on your house. Permits may or may not be required in your area and home owners may not be able to DIY some tasks. I have no way of knowing if you have the skills needed to complete the tasks you are asking about, when in doubt seek professional assistance.

        My advice may be worth exactly what you pay me for it. :-) For the record I did not stay in a Holiday Inn Express last night.
         
        Posts: 726 | Location: Cary, NC | Registered: Aug 17, 2006Reply With QuoteReport This Post
        Picture of Frodo
        posted Hide Post
        http://www.inspectapedia.com/p...ter_Improvement9.htm

        good question,i perfer series
        the piping to get the highest efficency MUST be the same. plumbed as the drawing shown...if the piping is not the same, water will follow the path of least resistence,,efficency will drop

        This message has been edited. Last edited by: Frodo,


        https://www.youtube.com/*****?v=vn7bkncf1_E
         
        Posts: 3843 | Location: I live in southern mississippi | Registered: Jun 01, 2008Reply With QuoteReport This Post
        posted Hide Post
        Thnks so much Sparky617! The tank closest to the taps is inconsistent. Sometimes warm water - sometimes hot as thermostat is set at. I assume that is the thermostat??? & Can that be replaced on a gas heater?? it is a Envirotemp heater 12 yrs old.
         
        Posts: 4 | Registered: Mar 01, 2014Reply With QuoteReport This Post
        Picture of Frodo
        posted Hide Post
        check elememts and t-stats...
        with a meter. see if you getting power across them


        https://www.youtube.com/*****?v=vn7bkncf1_E
         
        Posts: 3843 | Location: I live in southern mississippi | Registered: Jun 01, 2008Reply With QuoteReport This Post
        posted Hide Post
        quote:
        Originally posted by Frodo:
        check elememts and t-stats...
        with a meter. see if you getting power across them


        Frodo,
        It is a gas water heater.

        roug,
        You're getting beyond my area of expertise. I'm not sure how to troubleshoot your issue and what if any user replaceable parts there are on a gas water heater. Have you tried searching on line for a manufacturers website with tips and troubleshooting?

        What are your water uses in the house that you need to 40 gallon gas water heaters? With 2 adults and 2 teens in my house our 50 gallon has never had a problem keeping up even with a jetted tub. You might want to just bypass the suspected faulty one and shut it down.


        General Disclaimer

        Any advice given here is general in nature and is not necessarily valid for your given area. If in doubt check with your local codes enforcement department for what is required when doing electrical, plumbing or structural work on your house. Permits may or may not be required in your area and home owners may not be able to DIY some tasks. I have no way of knowing if you have the skills needed to complete the tasks you are asking about, when in doubt seek professional assistance.

        My advice may be worth exactly what you pay me for it. :-) For the record I did not stay in a Holiday Inn Express last night.
         
        Posts: 726 | Location: Cary, NC | Registered: Aug 17, 2006Reply With QuoteReport This Post
        Picture of Frodo
        posted Hide Post
        quote:
        Originally posted by Sparky617:
        quote:
        Originally posted by Frodo:
        check elememts and t-stats...
        with a meter. see if you getting power across them


        Frodo,
        It is a gas water heater.

        opps!!!!! my bad. no tstat or elements,
        just a thermo coupling and gas valve

        roug,
        You're getting beyond my area of expertise. I'm not sure how to troubleshoot your issue and what if any user replaceable parts there are on a gas water heater. Have you tried searching on line for a manufacturers website with tips and troubleshooting?

        What are your water uses in the house that you need to 40 gallon gas water heaters? With 2 adults and 2 teens in my house our 50 gallon has never had a problem keeping up even with a jetted tub. You might want to just bypass the suspected faulty one and shut it down.



        for 2 water heaters in series to work efficently, you need to have the piping configured correctly, if not one tank becomes a holding tank while the other does all the grunt work
        the temp controls on both gas w/h need to be set the same,
        look at my link i provided in my first answer, it shows the piping to be the same to both heaters, this is due to water following the path of least resistance.
        some people think you can just pipe the 2 heaters any old way and they will work, this is not so, one will always lead,the other will lag, and just heat the same water in the tank over and over again, path of least resistance,
        t

        This message has been edited. Last edited by: Frodo,


        https://www.youtube.com/*****?v=vn7bkncf1_E
         
        Posts: 3843 | Location: I live in southern mississippi | Registered: Jun 01, 2008Reply With QuoteReport This Post
        posted Hide Post
        Frodo,
        For some reason your youtube links aren't links. I did go check out the link to the InspectAPedia page. Good information there. I can see the issues with parallel configuration if the piping isn't right. With series the first tank could be set at a lower temperature to take the ground chill off the water while the second tank, closest to the point of use, would be set to the temperature you want. If water demand is high the first tank could be set to a higher temperature so the second tank doesn't have to bring the temperature up much. When I was a kid we had a tempering tank in the basement before the electric water heater, it allowed the water to come up to room temperature before it hit the water heater. When my dad replaced the electric water heater with an oil fired one he took out the tempering tank.


        General Disclaimer

        Any advice given here is general in nature and is not necessarily valid for your given area. If in doubt check with your local codes enforcement department for what is required when doing electrical, plumbing or structural work on your house. Permits may or may not be required in your area and home owners may not be able to DIY some tasks. I have no way of knowing if you have the skills needed to complete the tasks you are asking about, when in doubt seek professional assistance.

        My advice may be worth exactly what you pay me for it. :-) For the record I did not stay in a Holiday Inn Express last night.
         
        Posts: 726 | Location: Cary, NC | Registered: Aug 17, 2006Reply With QuoteReport This Post
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