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Old 01-08-2019, 05:10 PM   #106
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Re: New water heater only sending hot water for a short while


This is like watching a puppy chase its tail..........


When the water heater was replaced if the plumber put the new on in the same way that the old one came out and did not change any of the other plumping or open a valve that was closed then there is only one reason.........


DIP TUBE!!!!
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Old 01-08-2019, 07:08 PM   #107
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Re: New water heater only sending hot water for a short while


OP, You sure that temperature knob (pic on page 4) is *not* pointing at VAC (Vacation)?
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Old 01-09-2019, 03:55 PM   #108
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Re: New water heater only sending hot water for a short while


Rocky,

Below is the temperature knob:

Quote:
Originally Posted by RockyMtBeerMan View Post
OP, You sure that temperature knob (pic on page 4) is *not* pointing at VAC (Vacation)?
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Old 01-09-2019, 04:01 PM   #109
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Re: New water heater only sending hot water for a short while


Still waiting for the plumber to return.

In the meantime...

Today at 8:30am I touched the hot water pipe of my water heater. It was cold.

At 8:40am I took a shower.

At 1:00pm I went to the basement again and touched the hot water pipe. It was very hot.

I'm just trying to do some trouble-shooting with the hope that someone may notice something with the way my water heater is operating.

By the way, has anyone ever seen the device below. It's called a Backflow Preventer. It's on a pipe by one of the water boilers, and that pipe is connected to the pipe that goes to my hot water pipe on my water heater.

Quote:
Originally Posted by stripedbass View Post
Bob22,

Thank you for your post.

However, at around 12:45pm I decided to do a of test the hot water pipe of my water heater and those of my 2 immediately adjacent neighbors:

Here are the results:

1) When I touch the Hot pipe of my water heater it is hot.

2) When I touch the Cold pipe of my water heater it is room temperature.

3) When I touch the Hot pipe of my second floor neighbor it is vaguely warm.

4) When I touch the Cold water pipe of my second floor neighbor water heater it is gently cold
.
5) When I touch the Hot water pipe of my first floor neighbor it is gently hot,

6) When I touch the Cold Water pipe of my water heater it is room temperature.
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Old 01-09-2019, 04:41 PM   #110
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Re: New water heater only sending hot water for a short while


tribe_fan,

I called the manufacturer today (AO Smith).

They said that labor is covered for 3 years. Also, they have a working relationship with various technicians. The closest one to me is 30 miles away. I could have him check the heater. However, if the problem is determined to be a plumbing issue, rather than the heater itself, then I have to pay for the labor, and maybe even the service call itself (even if no work is done).

You suggestion was good in that it has at least given me an option to consider.

Again, thanks.

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You could call the manufacturer - they may send someone out. Rheem sent one out for me, even though i installed it (purchased from Home Depot)
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Old 01-09-2019, 04:41 PM   #111
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Re: New water heater only sending hot water for a short while


Show us more of the various pipes in the vicinity of the backflow preventer.

Your hot water line is not supposed to be connected to (space heating forced hot water) boilers that do not have tankless domestic water heating components inside.
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Old 01-09-2019, 05:08 PM   #112
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Re: New water heater only sending hot water for a short while


Hi Allan,

I'm not home right now. But below are two pictures that I took today.

Just so that you get some orientation, the Backflow Preventer is a couple of inches below the yellow-colored shutoff.

The second photo shows a horizontal pipe (the longest one and in the background) running from left to right after an elbow. That pipe is heading to my water heater's hot pipe. That pipe is also connected to the same Backflow Preventer which is below and out of view.

I can supply more photos.

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Originally Posted by AllanJ View Post
Show us more of the various pipes in the vicinity of the backflow preventer.

Your hot water line is not supposed to be connected to (space heating forced hot water) boilers that do not have tankless domestic water heating components inside.
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Old 01-09-2019, 05:40 PM   #113
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Re: New water heater only sending hot water for a short while


Must have enough hot water to take a shower or have learned to take really short showers.


Follow the incoming cold line and make sure that it goes to the cold of the heater . If the plumber simply exchanged old for new... then the challenge is the dip tube, just because it is new does not mean that it could not be the problem.

Who knows how it was handled from Factory floor to your place... any where along the line some thing could have knocked the tube out of place.
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Old 01-09-2019, 05:58 PM   #114
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Re: New water heater only sending hot water for a short while


Akpsdvan,

Yes, I've learned to take really fast showers! And most of the shower is with cold water or before it turns really cold.

Trust me, I followed the pipe and it does lead to the cold pipe of the water heater.

If the dip tube is the problem I would not be surprised at all. I say this because if I recall correctly, he brought the heater down these basement bulkhead steps (which are concrete) after he got it out of the box. I think when he brought it in it wasn't even on a dolly. And the angle of the entrance is really awkward. I even remember asking him something about it, and he said something like, "I've been doing this a long time," while panting. And from his tone, he didn't sound pleased, if you know what I mean.

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Originally Posted by Akpsdvan View Post
Must have enough hot water to take a shower or have learned to take really short showers.


Follow the incoming cold line and make sure that it goes to the cold of the heater . If the plumber simply exchanged old for new... then the challenge is the dip tube, just because it is new does not mean that it could not be the problem.

Who knows how it was handled from Factory floor to your place... any where along the line some thing could have knocked the tube out of place.
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Old 01-09-2019, 06:11 PM   #115
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Re: New water heater only sending hot water for a short while


Find a way of challenging the payment......... that is if he does not show up with in the next 48 hours or by close of Friday. Enough is enough... the plumber needs to deal with this now... and if the credit card company gets in on it... Money talks.............
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Old 01-09-2019, 06:36 PM   #116
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Re: New water heater only sending hot water for a short while


I have been watching this tread since the beginning. It is not the water heater, there is a cross over in the plumbing system. I can only guess because I am not there but perhaps the 2nd valve that was replaced should be in the off position. I wish I was there I find them often. again from what I read it is not the dip tube or water heater.
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Old 01-09-2019, 07:01 PM   #117
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Re: New water heater only sending hot water for a short while


jtmell,

Which valve are you referring to? The one that controls the cold water to the heater? The one that controls the hot water? Or the one that is supposed to be the shut-off for my entire condo unit but only controls the cold water?

Please let me know.

Thanks.

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Originally Posted by jtmell View Post
I have been watching this tread since the beginning. It is not the water heater, there is a cross over in the plumbing system. I can only guess because I am not there but perhaps the 2nd valve that was replaced should be in the off position. I wish I was there I find them often. again from what I read it is not the dip tube or water heater.
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Old 01-09-2019, 07:46 PM   #118
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Re: New water heater only sending hot water for a short while


Quote:
Originally Posted by stripedbass View Post
Still waiting for the plumber to return.

In the meantime...

Today at 8:30am I touched the hot water pipe of my water heater. It was cold.
It should be at least luke warm. A water heater full of hot water would naturally through convection and conduction, heat the pipes above it even without having run the hot water.
Quote:

At 8:40am I took a shower.
And yet your shower wasn't hot, was it?
Quote:

At 1:00pm I went to the basement again and touched the hot water pipe. It was very hot.
From what? Did you just run hot water?
Quote:



I'm just trying to do some trouble-shooting with the hope that someone may notice something with the way my water heater is operating.

By the way, has anyone ever seen the device below. It's called a Backflow Preventer. It's on a pipe by one of the water boilers, and that pipe is connected to the pipe that goes to my hot water pipe on my water heater.
No way no how should the hot water pipe from your water heater be connected to another unit's boiler. since you're on the 3rd floor, the hot water pipe should, after hitting a valve, make a bee-line directly up to your unit without branching off to anything else.
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Old 01-09-2019, 08:22 PM   #119
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Re: New water heater only sending hot water for a short while


Which valve are you referring to? The one that controls the cold water to the heater? The one that controls the hot water? Or the one that is supposed to be the shut-off for my entire condo unit but only controls the cold water?

quote
The only plumbing change that was made was the installation of a new shutoff to the water heater (in addition to replacing the one right above the water heater). We had to do this because the shutoff right above the heater did not shut off the hot water. It only shut off the cold water). This is why we had to shut off the building's main shutoff. But now with this secondary shutoff I do not have to shutoff the building's main shutoff. I'm attaching two photos below. I don't know whether they'll be clear enough for you to see. I think I'll have to take better photos of the shutoffs and post them.

I can't see theses shutoffs or totally understand your explanation of them but are you sure they do what you say they do ?
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Old 01-09-2019, 08:38 PM   #120
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Re: New water heater only sending hot water for a short while


Now you say that there is a horizontal pipe teed into the hot pipe coming from the water heater.

I suppose that the hot pipe goes up into the ceiling in which case we don't need to say anything more about it.

But the horizontal pipe needs to be investigated. Turn on the hot water upstairs and when it becomes cold turn it down to a medium flow. Now go downstairs and feel the hot pipe at the water heater and also all three pipes going into the tee. Which ones are hot, warm, cold?

Also describe where the horizontal pipe goes and what places, possibly plural, that pipe goes if there are more branches.
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Last edited by AllanJ; 01-09-2019 at 08:44 PM.
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