Questions tagged [water-heater]

For questions generally relating to the hot-water supply system of a typical residential or commercial building, primarily regarding the heating mechanism itself (a traditional hot water heater tank, tankless heaters including "point-of-use", boilers and heat exchangers, etc).

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3answers
21 views

Pressure relief valve putting out water

My water heater has been draining out large amounts of water which I understand is caused by the water temperature being to high. How do I address this issue so that it won’t continue?
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1answer
29 views

Can I use a shorter length anode rod?

I have a 6 year old 80 gallon American water heater, looking to check/replace the anode rod for the first time. It currently has a 3/4" aluminum anode rod, 52" length. I need a flexible anode rod, as ...
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1answer
39 views

Hot water heating recommendation

I'm looking for a recommendation on the best course to update our hot water heating system.Some background: When we moved into our upstate NY, 2200 sq. ft. home five years ago, the home was heated ...
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1answer
20 views

Proper Setup for Water Heater Gas and T&P Relief Valve

I will be replacing my water heater soon and want to get two clarifications. First, is the only issue with the current gas line that a sediment trap is missing or is there anything else that needs to ...
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2answers
38 views

High water pressure issue from hot water heater

Hoping someone can help me with this weird issue I am having with the water pressure at my house (at least seems weird and mysterious to me). This is an issue that started happening about 6 months ago....
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2answers
79 views

Why am I getting hum and lights dimming with a new electric tankless water heater?

So, I just installed an electric water heater and I'm getting a light hum from the water heater and the breaker panel. It's also dimming some lights.. unevenly. It seems to be more noticeable when the ...
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2answers
43 views

question about supplying gas via multiple lines to a water heater

We moved into a new construction home a few months ago. The house has what I believe are 1/2 inch flexible gas lines running from a basement manifold to various appliances (water heater, two different ...
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1answer
105 views

Can I shut off the water to my house and safely leave the water heater on while I'm away on vacation for a week? [duplicate]

I plan to shut off the main water supply to my 2 story house before leaving for a week on vacation. I have an AO Smith gas 'powervent' water heater in the garage that I would like to set to 70*F ...
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1answer
73 views

What advantage is there to a larger hot water tank with a lower FHR?

This Rheem spec sheet shows that their 40 gallon tanks have a higher first-hour rating than the 50 gallon: 86 compared to 78. If this is true, why do the 50-gallon ones exist? By what metric are they ...
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2answers
83 views

Home water pressure consistently exceeds 150 PSI

Background: When I bought my home it had a 50 gallon gas water heater in the garage without an expansion tank. On the hot water line there is a Watts adjustable pressure relief valve (this NOT the ...
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0answers
52 views

Why does my tankless water heater turn off when I open the cold side of the faucet?

Just got a new Canon tankless water heater. I was wondering, why does the heater go out when I turn on a cold water knob while the hot water knob is still open. Like, I'll turn on the left/hot water ...
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3answers
95 views

Is it ok to run a 30A water heater circuit on #12 wire?

I moved into a 50 year old home about 2 years ago and we’ve been using a (miraculously working) water heater from 1994. Yesterday, its life finally came to an end when I found it had sprung a leak in ...
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1answer
31 views

Circulation pump doesn't give enough hot water

I just got a new 50 gallon water heater and my circulating pump would only keep the hot for 1 shower (progressively getting cooler until completely cold). When I turned off the circulating pump the ...
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0answers
45 views

Upstairs shower not getting water

I have a weird one and may not be related. Came back from vacation and my basement was partially flooded from the Water Heater (looked like it was leaking from the bottom). As I was cleaning it up, ...
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0answers
133 views

Water Heater not getting 240v?

My water heater stopped working a few days ago and I've been trouble shooting it ever since. I found water in the connection receptacle. the leak from the the Air Conditioning unit above it has been ...
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1answer
34 views

Re-routing discharge pipe from hot water heater's T&P relief valve

Our new construction home (completed build in August 2018) in northwest Georgia (about 40 miles NW from Atlanta) has an electric water heater installed in an alcove in the corner of the garage. The ...
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33 views

Water Heater in crawl space

I am concerned that the hot water heater and furnace in the duplex I live in is not up to code. They are installed in a crawl space which is “maybe” 4 feet high. The space is dirt & the water ...
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2answers
52 views

Breaker Breaker, Which should I use?

I have setup a new water heater where I used 10-2 wire to a disconnect box. Then, connected a square D 30 Amp dbl pole in my breaker box. Water heater connections were black to black white to red and ...
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0answers
30 views

Connect boiler Wifi switcher

I want to connect boiler switcher, in the wall I have 4 wires, 2 live, neutral and earth, but on the wifi switcher it needs L(in) L1(out) N1(out) N(in) as shown in the pictures, How can I connect it?
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1answer
56 views

Shut off cold water supply valve on the heater, now can't turn it on

The valve just spins freely. What could be the problem? I'm getting cold water pressure just fine but only an extremely weak flow of hot water. Tried different fixtures. I don't know why this happened....
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14 views

White residue on flow heater pipe

My flow heater (Vaillant VED E 18/7) stopped working when I switched a breaker off. Upon opening the casing, I found out two things: 1: The water intake pipe has a small white discoloration and seems ...
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0answers
12 views

Bradford White Water Heater Loud Noise (No vibratrion; Exhaust sound)

Tonight our hot water heater starter making a loud noise that sounded like gas escaping from the bottom of the unit. I've provided a video for reference. I'm an amateur when it comes to this stuff, so ...
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4answers
5k views

How do electric hot water heaters explode and what can be done to prevent that from happening?

My neighbor and good friend is a union steamfitter, and general handyman. He had to replace his electric hot water heater last year and he did it himself. My wife and I have to replace ours now, and ...
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1answer
28 views

Electric water heater thermostat keeps tripping and needing reset

I have a 40-gal A.O. Smith Promax electric water heater (see pics below). It was a few years old when we bought the house, and we've been living here about 10 years. So I realize the heater may be ...
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3answers
166 views

Wrong installation of tandem breaker for 240V burn water tank

My contractor installed water tank https://www.homedepot.com/p/Rheem-Performance-50-Gal-Tall-6-Year-4500-4500-Watt-Elements-Electric-Tank-Water-Heater-XE50T06ST45U1/205810674 and it ran for a short ...
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1answer
34 views

Electric water heater stopped working when I adjusted the thermostat

I have a Craftsmaster 40 gallon electric water heater that is approximately 13 years old. Once it got cold outside and we started taking more hot showers, I felt like we were prematurely running out ...
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3answers
238 views

Is there a product for channeling water away from water appliances?

Some appliances, such as water heaters, dish washers, and washing machines use water, and can leak and cause damage to a house. Is there any product or solution to catch and drain leaks outside the ...
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0answers
34 views

Takagi hot water heater - intermittent failure to ignite (code 111)

I have a Takagi tankless water heater that has had 2-3 failures to ignite over a period of several months. It is a model T-H3-DV-P which burns propane and has outdoor intake & exhaust. Condensing ...
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0answers
30 views

Electric tankless water heater as preheat system before gas tank water heater

I have an apartment building with 12 units and a laundry room with 6 washer and dryers. I am about to install a solar PV system, and see this as my chance to reduce my gas bill by taking the load off ...
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0answers
20 views

Bypass water heater with Manablok system

My water heater broke this morning ... will be replacing on Monday. I have a manablok system with all kinds of shut-off valves. How do I know which valve(s) to shut off to bypass the hot water heater? ...
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2answers
55 views

Combustion Air Necessary Florida

I have a gas water heater in my garage that i enclosed with bi-fold doors. Since there were bi-fold doors with space on the top and bottom and also in the garage, we didn't install combustion air ...
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3answers
5k views

Why do gas water heater exhausts have an air gap before the chimney?

Every conventional (i.e., non-direct-vent) gas water heater I have seen has a roughly 1" vertical gap between its exhaust port and the exhaust vent (or "chimney"). See photo below. What function does ...
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1answer
44 views

Correcting Navien Tankless Hot Water Heater Installation

A while ago we had a plumber/friend install a Navien tankless water heater. We trusted him and thought everything was just fine as we were getting hot water throughout the house. There is a ...
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1answer
57 views

What is this orange residue in my water heater?

My water heater has two control panels: one for the upper thermostat and one for the lower thermostat. The other day I opened the panels in order to adjust the thermostats, and I noticed that in the ...
13
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4answers
3k views

Can tankless & conventional water heaters join forces?

Although I have properly maintained my nearly 20-year-old 40-gallon (150-L) Kenmore natural gas-fired water heater, I have been considering replacing it with a natural gas-fired tankless water heater ...
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1answer
43 views

Water is too hot in electric water heater

My electric water heater all of a sudden started producing scalding hot water. Tried turning down the thermostats. No change. Replaced both thermostats. No change. Turned new thermostats way down to ...
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1answer
71 views

Should you turn off and drain gas water heater if you leave for 6 months? [duplicate]

Water heater when you areA snowbird for six months
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0answers
45 views

Why momentary chemical smell after Tankless Hot Water Heater install

Why is my hot water stinky for a few seconds? This is a strong but hard to describe chemical smell like CPVC glue, not rotten eggs and not sewage or gas. I put in a new propane-fired tankless water ...
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1answer
44 views

Trouble understanding my heating system

Hi, just moved to this new place and I'm struggling getting the right temperature for hot water and heater. Could anyone help me understand the direction and source of each pipe? I guessed some of ...
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1answer
110 views

Do I really need to replace the anode rod?

Whenever I look online for information relating to anode rods in a water heater, they most often say they should be replaced regularly (4-5 years). However, every single plumber I have talked to has ...
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0answers
56 views

Installation of Liquid Propane Gas line to new Takagi Tankless Water Heater

I'm installing a new Takagi Tankless water heater and wanting to make sure I have the line plumbed to the unit correctly. I have the Main line @ 3/4" hard Pipe, 3/4" Ball valve, 3/4" Flex Line, Tee ...
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3answers
104 views

Can I replace a 30 amp breaker on my panel with a 25 amp for my new hot water heater?

My New Hot Water Heater requires a 25 amp breaker rating at the panel. I currently have a 30 amp at the breaker at the panel for the hot water heater. Should I change it to a 25 amp?
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1answer
27 views

Bedroom Install of a Takagi T-H3-DV-P - 199,000 BTU Propane Indoor Condensing Ultra-Low NOx

I'm in the process of a remodel, though I need to do it in phases. third or 4th phase down the road is to use part of the Master bedroom and make a Laundry room with some of the space. Though I ...
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1answer
66 views

No Hot water to Shower and Taps furthest away from hot water tank

I have this setup coming off of my hot water tank. Recently I started getting only luke warm water to the taps and shower furthest away from the water heater(#9 & #10), also sometimes my cold ...
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0answers
29 views

Relocating water heater to addition on block foundation

I'm doing a renovation in a small house I just bought. All the plumbing will be ripped out and redone and I'm hoping to take the opportunity to move the water heater and laundry. The problem is, the ...
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2answers
47 views

Water Heater - Discharge Pipe Goes Upward, How To Address

My tankless water heater (located in the basement) has the TPR valve discharge pipe traveling upwards, which is against code, and it terminates into the soil outside the house. What is the best way ...
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1answer
76 views

A water heater pressure relief valve/pipe is guided to release hot water outside of the pan (see picture). Is this installation correct?

A plumber installed the hot water pressure relief pipe to point outside the water heater pan, as shown in this picture (on the right). What could be the reason to do so? Is this recommended/proper ...
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2answers
59 views

Why is my circulator pump heating my house?

Our house had always had some latent heat coming through the vents even when they were turned off, which was causing the temperature to be pretty unbearable during the summer. One day, we heard ...
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1answer
26 views

Hot Water Water Hammer When Cutting Off Cold Supply

The house is 3 years old. This just started to happen. When you cut off any cold water supply the inlet line to the water heater knocks or water hammers. The first attempt I cut the water off at the ...
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2answers
90 views

Installing expansion tank at washing machine valve?

I own a condo with a terribly cramped water heater closet (it sits underneath the air handler with about 6 inches of clearance). I need an expansion tank, but it really will not fit in that closet (...