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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2
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1answer
64 views

Diagnosing a non-functioning hot water recirculation system

My house currently has a hot water recirculation system, but it does not seem to be functioning as the water in the upper levels take minutes to get warm. First off, I tried to determine whether I had ...
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3answers
60 views

Does clogged radiators increase the heating bills in a tankless combi boiler setup?

We moved to a "new" apartment and I was told by a family member that all the radiators are clogged like hell and we should get them cleaned ASAP which we never did. What makes me paranoid is ...
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1answer
38 views

Shower gradually cools, gets hotter when sink is on. Navien tankless whole house HWH

Our shower and a few other fixtures are behaving strangely. When I get into the shower it gets hot quickly and then gradually cools. But, I found that if someone else turns on a nearby sink (but not a ...
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2answers
49 views

Should I turn off a Tankless gas water heater during freezing weather if I cut water to the house during vacation

I will be away from home during freezing temperatures. I plan to cut the main water supply. But, I have a Rheem tankless gas water heater on my outdoor wall. If I cut the water supply, should I also ...
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1answer
101 views

Hot water heater causing buzzing/grinding sound in circuit breaker panel

I just installed an AO Smith 50 gallon hot water heater in my basement in May of 2021. It has been working great for the past half year or so. Today, I found that I only had luke warm water for my ...
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0answers
41 views

Mixing CPVC sizes through a heater

I am off grid, and need more hot water pressure. When they built my house they plumbed 1/2 inch CPVC to two showers, 3 sinks and a washer. The reason is the hot water heater has 1/2 inch in and out, ...
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3answers
45 views

PVC pipe from Water Heater is sending some water into garage floor

Water has come out of the PVC pipe attached to the hot water heater in the garage (less than a cup of liquid). There's no drain under the PVC pipe, so it seems it's not intended that it would drain a ...
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0answers
34 views

Trouble with water and electric hot water heater

So our cold water has low pressure and we've had water problems for over a year now, not sure if that matters. But I was doing the dishes and the hot water started to get cold but i figured someone ...
7
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2answers
2k views

(When) Does room messiness affect water heater efficiency?

I have what I think of as a "standard US electric standby water heater." I will update this when I know the model; I am out of town right now. It is located in a cold, cluttered closet in a ...
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9answers
3k views

Need to know if tankless hot water system for my new house build is a good option if I only have electric power

I am building a house and I’m considering a tankless hot water system for the entire house. I live in New Brunswick, Canada and I will only have regular electricity via NB Power. We don’t have gas. So ...
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0answers
28 views

Rated ampacity of water heater thermostat

What is the rated ampacity of "standard" water heater thermostats? The kind you see all over the place from a million different vendors. I cannot seem to find an electrical data sheet on any ...
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1answer
48 views

Best & cheapest small hot water heater for condo? [closed]

I live, part time, in a condo built in 2002. I have a short, squat 50-gallon water heater that is situated under my laundry counter top, that has worked just fine, despite being about 19 years old. I ...
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0answers
33 views

Will adding a transfer grill to the mechanical room help with water heater backdraft?

I have a small mechanical room in the basement with an HVAC system that has an open return at the base plenum under the furnace blower. There are no transfer grills and cold air returns to the ...
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2answers
94 views

What steps should be taken when starting to use a hot water system that hasn't been used for years?

Our house has a gas boiler that's connected to both a closed-loop central heating system, and to a system involving a hot water tank and a cistern (through a valve that determines whether it ...
4
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4answers
1k views

Can/should I change GFI outlet to standard outlet

I am having my retirement house built. The house includes two RHEEM RTG-84DVLN-1 tankless water heaters that are plumbed in parallel. The instructions state do not hook up tankless to a GFI outlet ...
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1answer
60 views

What's the purpose of a pump on water heatr inlet?

Our water heater has an electric pump on its inlet. During a recent service call on the water heater the technician said it was a good thing. What is not clear is the pump's contribution. Especially ...
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4answers
1k views

Hot water tank loses heat by closed loop gravitational circulation - need to improve thermosiphon

I have a 300L hot water tank. It's heated from an air-to-water heat pump. The hot water tank is connected to a heat exchanger. When any hot water faucet is opened, a circulation pump is turned on ...
2
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1answer
65 views

How can I dampen a tankless water heater’s humming sound?

I just moved into our new home. First time with a tankless heater. I notice that whenever we turn on hot water after turning it off the tankless heater makes a humming sound. It seems like this is ...
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0answers
47 views

Adding switch/outlet receptacle to 20 amp circuit

I put a power vent water heater in basement, and only nearby outlet is GFCI (for a rarely used sump pump) that I'm told is not code for the power vent blower. There is a nearby dedicated non-gfci ...
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1answer
42 views

Can a failed expansion tank cause water heater to stop heating water

Yesterday we saw that the expansion tank on our < 8yr old water heater looked like this: Hot water is no longer available. If it's possible for the tank spill to cause the heater to stop heating ...
0
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1answer
105 views

How can I power a 120V 50A water heater?

I have an electric shower head water heater. If you only have a cold water feed, it’s a great gizmo to have. The problem has been the proper current to operate it. It says it requires 110V 4800W 50A ...
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1answer
35 views

Anode rod location

I have an old (installed ‘06) Kenmore Power Miser 12 and I cannot figure out where the anode rod is located so that I can replace it. Is it under the cap?
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1answer
128 views

How to connect C-Wire to Weil-McLain Boiler CGa Series 3

I'm trying to install a Nest learning WIFI thermostat to my boiler. However, I'm not sure where to connect the common wire. I've went through multiple posts on this forum but unfortunately wasn't able ...
0
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1answer
30 views

How best to change a section of PEX hot water return line between two FIP tee fittings?

I want to change the section of PEX hot water return line between the 1/2" tee fitting near the floor beam and the 3/4" tee fitting at the water heater drain. I want to keep it simple with ...
15
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3answers
5k views

How to drill through wall without hitting boiler on the other side

I need to drill a hole through from my living room to my garage to put an ethernet run between them. I can only drill through from the living room in one spot due to the positioning of the electrical ...
0
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1answer
163 views

Auto air vent above boiler hydronic expansion tank dripping/leaking

I have a boiler + indirect water heater system. Above the boiler on the hot water outlet side there are a water expansion tank and an auto air vent and on the return side there is another auto air ...
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1answer
32 views

What Navien error is this?

My Navien tankless water heater is showing an error message (although it's still heating water). I'm not sure if this is error 45 or error 116.
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0answers
30 views

Should this heating system bypass valve be open during operation?

My son recently purchased a home with a hot water heating system. Unfortunately I'm not there to take better pictures. It is based on a Buderus Gas Heater. There appears to be a bypass line with a ...
2
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1answer
96 views

A natural gas water heater was used accidentally when propane was the gas source. Is the natural gas water heater damaged or if so, repairable?

A natural gas water heater was used accidentally for a few months when propane was the gas source. Is the natural gas water heater damaged or if so, repairable? Does propane gas burn hotter than ...
0
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1answer
50 views

Can I add a backup electrical heating element to this hot water storage tank?

I live in Europe and have a gas furnace that heats the water in my hot water storage tank. I would like to add a backup electrical heating element to the tank that I can turn on if our furnace ever ...
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2answers
91 views

Return strategies for major appliances

Last week I purchased a water heater from our local Home Depot, a Rheem Gladiator model (one of those with the leak sensors and wifi/smart stuff). It wasn't easy lifting it into place in the confined ...
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2answers
64 views

How many extra water heaters do we need for 5 full baths and 2 sets of washer and dryers?

We purchased a home to convert it as an Airbnb for 10+ guests in Atlanta. The house currently has 3 full baths and a washer and dryer set. It also has a full basement that we are going to finish with ...
1
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1answer
55 views

Raising waterheater on bricks to gain clearance under

I was wondering if it's recommended (against) raising a waterheater on bricks to gain clearance under, which is desirable in my case to clean the air intake? The waterheater will be sitting on a ...
1
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1answer
66 views

Bypass to feed cold water into hot pipe

I would like to be able to feed water from the cold water pipe into the hot pipe directly bypassing the waterheater (WH) upon demand, such as the WH being off for whatever reason. The switch would be ...
0
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0answers
34 views

Yellow slime in water pipe

Our water heater expansion tank sprung a leak this evening. I am going to replace it but in the short term I cut the horizontal pipe that lead to the tank and capped it with a SharkBite. I was ...
0
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1answer
107 views

It takes a long time before I get hot water upstairs. could this be due to hard water?

I live in a three-story townhouse and I have a Navien tankless water heater installed in my first floor garage. When I turn on hot water on the first floor, I’m able to get hot water pretty quickly, ...
1
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0answers
50 views

Warm water often coming from cold taps

The issue I am having is that very often, the water in the cold line from my taps is cold for a few seconds when I turn it on, and then it warms up almost immediately and stays warm. Last year, I was ...
-1
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1answer
82 views

Can water heaters receive hot water through the inlet pipe without malfunctioning?

I'm using solar powered water heater panels now, and I want to reuse my old gas heated water tank, as just a reservoir for accumulating hot water from solar without gas powering it (disconnected from ...
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0answers
25 views

Leaking around flange on inlet of water heater

I am having a problem with a leaky water heater. It is leaking on top around the cold water inlet. I replace the nipple, but this did not fix the issue. It appears the leak is not right around the ...
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0answers
70 views

Air in hot water lines after new water heater installation

Replaced 20 year-old water heater (professional install) a month ago. Ever since it was replaced I get air in hot water lines first thing in the morning. I get less air throughout the day since I use ...
0
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1answer
104 views

How to find a drain line for water softener installation?

I'm looking to replace "Nuvo Home" with a Aquasure salt-based water softener (Harmony Series 48,000 Grains). Installation process seems to be straightforward, but I'm not sure where the ...
0
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1answer
63 views

Connect bottleless water dispenser to this water installation?

I have a bottleless water dispenser with a thin blue tube that connects to the water source. I have an area for the dispenser, but I don't know what water connector I have to purchase to make it work. ...
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1answer
124 views

Vent 80% gas water heater through rim joist?

Can an 80% efficiency, draft hood, 40k BTU, water heater be vented through a 2x10 wood rim joist with painted cedar siding? Assume proper pipe sloping. The termination would be roughly 2 feet above ...
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2answers
49 views

If I build walls surrounding sump pump, water heater, furnace, A/C, will it work stopping flood water from spreading to entire basement?

In the past, my basement was flooded twice. Both of which where lower than 8". I'm wondering if the following works to prevent future flooding of my basement or stop water from spreading to the ...
0
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1answer
38 views

Valves on an electric hot water heater

I'm getting ready to replace my GE electric hot water heater. On top there are hot AND cold water valves. When draining the heater, I know to shut the cold water valve. What about the hot water valve? ...
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3answers
67 views

Water Heater (Tankless), Furnace, Chimney? What order of work? Different contractors?

PRIORITY 1: I have a 21 (yes 21) year old water heater (go AO Smith!) that I want to replace with a tankless water heater (live in MD). WANT 1: I have a chimney that needs to be lined and a fireplace ...
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2answers
43 views

Expansion Tank on Water Heater horizontal installed

When I check the pressure on my horizontally installed expansion tank, I get a little water coming out as I depress the pressure gauge on the valve. The valve is on the lower side of the tank. Is that ...
1
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1answer
69 views

Why does my shower fixture groan every 10 seconds?

For a few years now I have noticed a groaning noise from the wall behind my bedroom shower valve every time a water faucet is turned on and off anywhere in the house. Today I noticed that groaning ...
0
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1answer
65 views

How can I prevent dirt from accumulating in a gas water heater in my garage?

I have a gas water heater in my garage that was installed when it was built for the radiant heating. The issue I've had is that it appears to draw in dirt from the area and burns out and the water ...
0
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3answers
91 views

Constant water running from hot water heater

A few days ago I started hearing water running from washing machine drain. After looking it is the copper pipe running from the hot water heater. There is no other leaks, no loss in pressure or ...

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