How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask Bud Your Own Question

Bud
Bud, Plumber
Category: Plumbing
Satisfied Customers: 556
Experience:  22 Years Field Experience - 17 Years Business Ownership - Residential or Light Commercial
13237305
Type Your Plumbing Question Here...
Bud is online now
A new question is answered every 9 seconds

How do you hook up two water heaters? I have 1 for the kitchen

Resolved Question:

How do you hook up two water heaters? I have 1 for the kitchen area and two on the other side of the house for the living areas. These are the large ones (about 4.5 ft tall). There doesn't seem to be any more reserve than if it were one. Currently there is cold in split by a T with each leg going into the intake of both. Output from both merge to another T going to one that feeds the house. There is a cut off valve on each leg of the intake side.
Submitted: 5 years ago.
Category: Plumbing
Expert:  Mario replied 5 years ago.

it is verry important that the all the pipes are equal length and size for instance

 

all 4 pipes ( 2 for the cold in and 2 for the hot out ) should be XX inches by XX inches ( 3/4 1/2 ect ect )

 

and all the lines that twin togher ( go to the tee ) should be the same size

 

now some people say the water heaters should be the same size in all aspects ( hight width gallon size ) i also agree with that as well

just remember

 

from one heater its cold in and from cold in it

then hot out to cold in on the other heater

 

then its hot out of the other heater

Customer: replied 5 years ago.
When you say equal size for the 4 pipes, you mean all 3/4 inch, etc, but not same length such as 2 ft for each one. I assume you mean running them in series where one preheats and sends it's supply to the other then out to house. I f that is the case you only need one pipe, right? In from the supply, out with the one piece to in on the other, and then out to the house. The main in and the out to house are already there.
Expert:  Mario replied 5 years ago.
yes do your best to keep them all the same length up to the tee where they go to the system ( its verry impprtant )
Customer: replied 5 years ago.
Dude, did you even read my question? In to one and out to another only uses one piece of pipe. The input is ?? length b/c it comes from the street. The final output is?? length b/c it runs to the whole house. The only piece is the one going from the output of one to the input of the other.
Customer: replied 5 years ago.
Relist: I still need help.
Response had two different answers to the same question, both of which conflicted with the other.
Expert:  Bud replied 5 years ago.

I am Bud - Another online "Plumbing Consultant"


Your heaters are plumbing in parallel and you are wanting to change to series plumbing, I think. With parallel plumbing, Mario is correct, every pipe, tank, fitting has to be the same length for restriction purposes. With series it doesn't matter about pipe length. The draw back to series plumbing is, the primary heater will do all the work. It is very possible some buildup in the bottom of one of the tanks is causing the lack of adequate hot water.

 

graphic

 

 

 


I hope the above information helps, if it does not please let me know.

 

 

 

If you leave POSITIVE FEEDBACK for me you deserve a

 

 

Customer: replied 5 years ago.
Thanks. One more question. My water heaters are only 6 yrs old but it really feels like I am drawing from one by the amt of hot water I have. I do not believe my parallel set up is correct. From your answer and Mario's. I conclude that either one should work if done correctly. It seems like the series setup is easier to hook up. I also assume that the first heater (from street) should be set 1/2 of your desired temp, and the second (going to house) set at desired temp? If this is correct, will it provide more volume of hot water. which is better. Parallel or series.
Expert:  Bud replied 5 years ago.

I am Bud - Your personal online "Plumbing Consultant"


Series is much less problematic.

 

Both will give the same amount of hot water, in theory... I would set both themps the same. If you set the first at a lower temp it will require both heaters to run every time, if you set both the same the secondary heater should only come on when you have a large demand for hot water.

 

My opinion is series.

 

 

 


I hope the above information helps, if it does not please let me know.

 

 

 

If you leave POSITIVE FEEDBACK for me you deserve a

 

 

Bud, Plumber
Category: Plumbing
Satisfied Customers: 556
Experience: 22 Years Field Experience - 17 Years Business Ownership - Residential or Light Commercial
Bud and other Plumbing Specialists are ready to help you

JustAnswer in the News:

 
 
 
Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.
 
 
 

What Customers are Saying:

 
 
 
  • You did one super job of explaining to me everything there is to know about this fridge. I'm looking forward to asking you questions in the future. Jimmy Bagley, IA
< Last | Next >
  • You did one super job of explaining to me everything there is to know about this fridge. I'm looking forward to asking you questions in the future. Jimmy Bagley, IA
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex Los Angeles, CA
  • Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult. GP Hesperia, CA
  • I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin Kernersville, NC
  • Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around. Esther Woodstock, NY
  • Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know. Robin Elkton, Maryland
 
 
 

Meet The Experts:

 
 
 
  • Marc

    Plumber

    Satisfied Customers:

    996
    Plumbing heating & home maintenance contractor
< Last | Next >
  • http://ww2.justanswer.com/uploads/VE/Veillplumb/2011-8-31_155028_IMG1104.64x64.JPG Marc's Avatar

    Marc

    Plumber

    Satisfied Customers:

    996
    Plumbing heating & home maintenance contractor
  • http://ww2.justanswer.com/uploads/plmqwk/2010-08-28_151844_profile_pic.jpg Plmqwk's Avatar

    Plmqwk

    Master Plumber

    Satisfied Customers:

    850
    20+ years in plumbing field. Licensed master plumber, commercial plumbing inspector
  • http://ww2.justanswer.com/uploads/JE/jerrymassie/2011-1-15_45937_1111055.64x64.JPG Jerry's Avatar

    Jerry

    Plumber

    Satisfied Customers:

    777
    over 20 years residential plumbing experience.
  • http://ww2.justanswer.com/uploads/PL/plumber171/2011-8-13_11445_plumber.500x500.64x64.jpg Mario's Avatar

    Mario

    Master Plumber

    Satisfied Customers:

    604
    Master Plumber, Fire Sprinkler, and Jobbing Spec.
  • http://ww2.justanswer.com/uploads/ABSBoss/2009-03-25_163017_2007-1031_046.jpg Bud's Avatar

    Bud

    Plumber

    Satisfied Customers:

    538
    22 Years Field Experience - 17 Years Business Ownership - Residential or Light Commercial
  • http://ww2.justanswer.com/uploads/TH/theplumber717/2011-11-24_34039_DSCF7012.64x64.JPG Theplumber717's Avatar

    Theplumber717

    Plumber, Hvac Tech

    Satisfied Customers:

    520
    Lic Plumbing contractor, 27/yrs res,com,repair,Universal HVAC Tech
  • http://ww2.justanswer.com/uploads/skibum0101/2008-12-16_015819_just_answer.jpg Rick Mather's Avatar

    Rick Mather

    Building Inspector

    Satisfied Customers:

    494
    Assistant Building Official, HVAC Tech