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Takagi tankless NG water heater?

Posted on 6/12/17 at 8:40 am
Posted by ColoradoAg03
Denver, CO
Member since Oct 2012
6688 posts
Posted on 6/12/17 at 8:40 am
Any OTers have one in their home? What are your thoughts about it? The one I'm looking at seems to have a ton of good online reviews no matter what retail website you look at.

I'm thinking about changing my 16yr old 40 gal water heater for this Takagi water heater model....

LINK

A lot of reviews (tons on Amazon) suggest getting the service valve kit with it as well.

TIA!
This post was edited on 6/12/17 at 8:42 am
Posted by Cosmo
glassman's guest house
Member since Oct 2003
132643 posts
Posted on 6/12/17 at 8:41 am to
Gonna cost you bigly to redo your house to handle that
Posted by The Mick
Member since Oct 2010
45198 posts
Posted on 6/12/17 at 8:44 am to
I have two Rheem tankless units but some reason only one is in use. I bought the house 1 year old and all the lines are routed through one unit but it's been fine.

Water is hot, what else can I say.
Posted by The Mick
Member since Oct 2010
45198 posts
Posted on 6/12/17 at 8:45 am to
quote:

Gonna cost you bigly to redo your house to handle that
Cant you just use the supply and outgoing lines that are hooked to the old tank unit now?
Posted by ColoradoAg03
Denver, CO
Member since Oct 2012
6688 posts
Posted on 6/12/17 at 8:47 am to
quote:

Cant you just use the supply and outgoing lines that are hooked to the old tank unit now?


This is also my understanding. At least nobody in the many reviews has mentioned having to replace lines to accommodate this unit.
Posted by ColoradoAg03
Denver, CO
Member since Oct 2012
6688 posts
Posted on 6/12/17 at 8:50 am to
quote:

The Mick


Have you had issues with the hot water running out quickly with your tankless?
Posted by nolabuilder
Member since Jul 2016
79 posts
Posted on 6/12/17 at 8:52 am to
Depending on the size of your existing gas line, you may have to increase the size to accommodate the tankless unit. You also cannot reuse the old vent pipe. Will need to replace that as well.
Posted by Duckhammer_77
TD Platinum member
Member since Nov 2016
3079 posts
Posted on 6/12/17 at 9:02 am to
A plumber can retro fit to your existing supply & return. Can't go wrong with gas, have you looked at Rennai heaters? I've used those with clients, very good heaters.
Posted by The Mick
Member since Oct 2010
45198 posts
Posted on 6/12/17 at 9:02 am to
Just the opposite actually. Seems to be unlimited hot water and I have large family.
Posted by ColoradoAg03
Denver, CO
Member since Oct 2012
6688 posts
Posted on 6/12/17 at 9:06 am to
quote:

Just the opposite actually. Seems to be unlimited hot water and I have large family.


Good to hear. There will only be 2 of us regularly, sometimes 4 if we have guests visiting.
Posted by madmaxvol
Infinity + 1 Posts
Member since Oct 2011
22488 posts
Posted on 6/12/17 at 9:10 am to
I have a Rheem tankless unit. We can run three showers washing machine and dishwasher at the same time and not run out of hot water. It is pretty incredible.
Posted by TrueTiger
Chicken's most valuable
Member since Sep 2004
83545 posts
Posted on 6/12/17 at 9:20 am to
Takagi?

Sounds like it came from the same people who brought us Pearl Harbor.
Posted by Teddy Ruxpin
Member since Oct 2006
40994 posts
Posted on 6/12/17 at 9:25 am to
quote:

Takagi? Sounds like it came from the same people who brought us Pearl Harbor.


To me, it sounded like the boss from Die Hard.

ETA: Hell ya, I was right
James Shigeta played Joseph Yoshinobu Takagi
This post was edited on 6/12/17 at 9:27 am
Posted by The Mick
Member since Oct 2010
45198 posts
Posted on 6/12/17 at 10:18 am to
quote:

Good to hear. There will only be 2 of us regularly, sometimes 4 if we have guests visiting
Ah you'll have no issues at all imo.
Posted by tigeraddict
Baton Rouge
Member since Mar 2007
15176 posts
Posted on 6/12/17 at 10:20 am to
quote:

Cant you just use the supply and outgoing lines that are hooked to the old tank unit now?


Water pipe sizing will not change with respect to a tank type or tankless type

Look at the BTU input on the tank heater and see what the BTU is for the tankless neater. if the same, your gas pipe size will not change. however, tankless will need higher BTU input in order to get the same gallons per hour, as you have no storage capacity.

If the heater is going close to your meter/regulator, likely wot be an issue, but if far from the meter/regulator, you may need to increase pipe size.
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