Tagged Questions

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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0
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1answer
80 views

Hot water running out, already replaced both heating elements and both thermostats

Our hot water runs out during one not-too-long shower. By the end of the shower, I have the cold water completely off and the hot water coming out is only lukewarm. My husband already replaced both ...
1
vote
1answer
81 views

How does decalcifying work, and is it something I need?

We recently had to replace our water heater because of lack of hot water, age (12 years to the day almost) and sediment build up (it was higher than the lower element; we purchased the home 7 months ...
2
votes
3answers
367 views

Does a thermocouple need to be screwed in to work?

I'm recently having trouble with a water heater. The pilot light with ignite just fine, but will go out after releasing the reset button, even after holding it for over a minute. That makes me think ...
0
votes
1answer
123 views

How close can an electric water heater and an electric furnace be to each other?

How close can an electric water heater and an electric furnace be to each other? My water heater is 7 inches from my furnace. I need 4 inches so that I can install a water softener and wash sink. So ...
0
votes
1answer
510 views

Desuperheater vs Heat Pump Water Heater

I'm having a geothermal heating system installed in my home, and the contractor recommended heating my water using a buffer tank and desuperheater, which is a device that cools the refrigerant lines ...
7
votes
4answers
21k views

Should the water heater be shut down if the water main has to be turned off?

I have a brand new AO Smith 50gal Gas water heater, today there was a pipe burst from the cold spell we're having in the states currently so I had to turn off the water to the house until the plumbers ...
0
votes
2answers
159 views

How much distance do I need to branch from water heater?

I moved my washer and dryer next to my electric water heater. I would like to know how close to the tank can I branch the hot and cold water lines. I would like to use a 3/4 to 1/2 inch reducer at the ...
1
vote
3answers
458 views

Combi boiler doesn't realise it's already lit

I have an Ariston Eurocombi (A23). The problem is it doesn't realise the flame is lit. When I start it up and cause demand (run hot tap or turn on heating) it fires up the flame correctly, however, ...
3
votes
5answers
410 views

Is it okay to flush water heater onto the drip pan with drain hole?

Our water heater is on the second floor and we need to have it flushed. It has a drip pan with a hole that has a tube attached to it. Common sense tells me that I can flush the water heater directly ...
1
vote
1answer
40 views

possible cause for the water heater being unable to be lighted

The water heater could not be lighted. I tried several times without being successful. What could be the possible causes for the water heater to fail to be lighted. This water heater is only 1 and ...
2
votes
2answers
295 views

How to calculate potential energy savings from using a tempering tank?

I have a boiler (oil) with integrated water heater (3.5 gallon). I don't have problems with running out of hot water but I do wonder if having a tempering tank before the boiler would save money on ...
5
votes
2answers
1k views

How do I prevent harmonic resonance hum in PVC vent of newly installed hot water heater?

I just had a new power vented water heater installed (HTProducts Phoenix Light Duty) in our crawlspace. The contractor that put it in used part of the existing 3" concentric vent from the furnace we ...
0
votes
0answers
3k views

Why won't the burner on my gas water heater light?

I have a Whirlpool 40 gal gas water heater that I got around 2 years ago. Doing dishes tonight, I noticed the warm water was getting colder. When I went to check the water heater, the signal light ...
2
votes
2answers
511 views

How can I prevent the intake vent for an on demand water heater from getting plugged?

We have a Navien on demand cold water heater. The intake and outlet vent pipes run out through the poured concrete foundation and have a plastic grill on the end. If the intake vent is blocked in any ...
0
votes
0answers
28 views

Why is the water heating up when it's switched off?

Our central heating is timed to come on twice a day and water heating is off. However, water is heating up. British Gas engineer unable to come up with solution (has changed a valve on hot water ...
1
vote
0answers
97 views

Can a water heater be installed overhead?

Sorry for the long preamble: I'm doing a remodel which involves building a new attached garage. At the same time, I'm replacing the water heater because it is ancient. I have considered a ...
0
votes
1answer
349 views

Is this electric water heater wiring correct?

I recently re-wired my water heater from 120v to 240v. I'm not sure why it was wired with 120v to begin with, but it was not providing enough volume of hot water. I looked up basic thermostat wiring ...
0
votes
1answer
214 views

Water heater leaking from the top?

I recently noticed that water is pooling on the top of my water heater. When I took a closer look it appears that the leak is coming from where a metal hose comes into the top of the water heater. ...
2
votes
1answer
63 views

Does a broken TPR valve disable the water heater?

Would the pressure release valve going bad on a water heater cause the water heater to quit working?
1
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2answers
453 views

Why isn't the water on my second story getting as hot as I'd like?

I purchased a new whirlpool water heater about 2 months ago. I have a two story house, their seems to be a good hot water to the first floor faucets but it seems like it takes a long time for the hot ...
3
votes
1answer
934 views

Why does my gas water heater's pilot light go out when I replace the outer door?

I have a 9 year old Bradford White gas water heater, model MI403S6FBN4. The pilot light went out today, and when I went to re-light it, it stays lit while the pilot button is held down, and it stays ...
0
votes
1answer
38 views

Inline water heater temperature floor?

I have an inline water heater. Once it gets hot it will stay that way for 20+ minutes at a time easily. When the shower gets used it feels like their is a floor in how cold the water will get - if ...
5
votes
3answers
2k views

Is it OK to drill through a jack stud/full stud pair to cut a hole for water heater drain pipe?

I just had a new water heater installed in my garage. My city building / plumbing codes require that the water heater overflow drain be drained to the outside of the house. Situation: The heater ...
0
votes
1answer
170 views

Why is the pilot on my GE water heater turning off when the burner turns off?

I have 2 GE 28 gallon water heaters, both of which have the same problem. The water heater is turning off after a while, and I have to light the pilot again to got hot water. What could be causing the ...
0
votes
1answer
3k views

How should I connect nipples to a hot water heater?

I recently installed my new hot water heater. I know nothing about plumbing and my installation procedure was informed only by sketchy home depot employees and youtube. One of the issues I'm having ...
0
votes
2answers
3k views

Why won't my pilot light stay lit on my hot water heater?

I have a reliance model 5 30 NORS971 gas HOT WATER tank. The basement flooded a little and put out the pilot. When it would not light, I replaced the pilot tip and went ahead and replaced the ...
2
votes
1answer
214 views

Plumber told me it's unsafe to drain my water heater — what should I do?

We are new homeowners. Our 11-year-old 2nd-floor water heater was leaking and the first plumber who came told us he would need to come back with a partner to take it away. I asked if I could drain ...
0
votes
1answer
113 views

How do I turn off my water heater drain?

I read that draining the water heater is general good practice. The problem is that I don't know how to turn off the draining plug. It kept draining water through the night. Here is a picture of the ...
0
votes
0answers
205 views

Can I reuse an abandoned roof vent?

I have a house that has an old 8-10 inch diameter vent that used to be used as stove/oven vent. I think that newer gas ovens don't require venting like a water heater needs (ie they don't have a ...
2
votes
2answers
987 views

Properly venting a gas water heater

Ahh, the joys of an old house. The former owners of my house did some funky stuff with venting the water heater. Let me explain: the water heater is in the basement there is a 3 in single walled ...
0
votes
1answer
515 views

how do I remove a stubborn element from a water heater?

I need to pull and replace the elements in my water heater. the problem is, I can't get the old ones out. my channellocks can get a grip, but slips off pretty easily. is there something better for ...
1
vote
0answers
302 views

Tankless water heater and inconsistent water temperature

We recently brought a house that was built in 1927, and much of it has been updated. The previous owners put in a tankless water heater two years ago. Our hot water is very inconsistent. When someone ...
1
vote
1answer
233 views

Could this corrosion be caused by faulty ground wiring?

What might cause slight corrosion atop a tankless water heater's copper topped element assembly? I checked all the grounding and reconnected the two element assembly grounding wires and ensured ...
1
vote
1answer
156 views

What are the three copper connections to my water heater?

Why do I have 3 copper pipes in my gas water heater? It seems two are cold and one is hot. All videos I see online show only two pipes; one for cold coming in, one for hot going out.
0
votes
1answer
1k views

How can I remove a temperature and pressure relief valve that seems to be stuck?

I have a hot water heater relief valve that is leaking heavily. The water heater manual states I should replace the valve (which is OK by me). Unfortunately, I am not able to remove the valve as it ...
1
vote
1answer
91 views

Why is my electric water heater not working?

I have electric heating in my flat. My water is not heating up even though the timer light comes on and the immersion light comes on. Any idea what it could be?
18
votes
1answer
14k views

What temperature should I set my hot water heater to?

When adjusting my hot water heater, what temperature should I set it to? Is the answer different if you have: Concerns about diseases A dishwasher Young children or elderly that can be easily burned ...
4
votes
2answers
550 views

What's the next step in troubleshooting my electric water heater?

We have a SpaceSaver (Model number: SS012SEB15), single-element 120v/1500w hot water heater which worked great until one day it went completely cold. First thing was I tested the voltage to the ...
1
vote
1answer
883 views

How do I diagnose and fix an electric water heater leak?

I have an Electric Water Heater, seemingly leaking from the top of the tank. The "wells" on top are filling up with water. There are no noticeable leaks from the pipes above. Each water attachment ...
1
vote
1answer
60 views

Why is my water heater leaking?

Last night after I took a shower, I heard water still running and I saw that it was leaking from the bottom of the heater. I shut off the hot water and it still wouldn't stop, so I turned the water ...
2
votes
1answer
188 views

What could be causing corrosion on a water heater burner?

Every 6 to 8 months or so my water heater (A.O. Smith 'Power Shot' high-efficiency) stops heating. The first time this happened (mid 2010) a plumber friend discovered that the burner had some ...
3
votes
2answers
874 views

Is it okay to put a heat pump water heater in a crawl space?

I have a pretty large crawl space. It is 80 inches wide and around 7 feet high. I am looking to replace the 50 gallon electric water heater with the new Geo Spring Water heater by GE This unit is wide ...
4
votes
1answer
74 views

Does a larger solar water heater equate to better water pressure?

Please excuse my ignorance - we want to buy a typical slanted rooftop solar water heater for our home. We thought 200L would be an acceptable capacity, but the vendor we visited today said that we ...
2
votes
1answer
109 views

Is it time to replace my water heater?

I have a 20+ year old, 115 gallon, electric water heater. Works like a champ, but I'm considering replacing it for a couple of reasons. It's leased - I pay $20/mo. It's 115 gallons for a house with ...
1
vote
0answers
119 views

What would cause a water pressure drop after tripping a breaker?

I recently plugged my laptop into a cheap powerbar, which caused said-powerbar to short. This tripped the "sockets" circuit on the breaker, which, upon resetting, caused power to begin flowing to ...
1
vote
1answer
331 views

How should I avoid corrosion at this water heater connection?

I installed a new water heater 2-3 years ago. I put 3/4 pipe to PEX adapters on it and then used pex to connect to my house. On the hot water outlet, corrosion and rust is forming. I bought some ...
3
votes
1answer
295 views

Why does my Rinnai Infinity water heater fire up after turning off the cold tap?

I have a Rinnai Infinity XR20. It's about 3 years old. I've just recently noticed a peculiar issue with it that I hadn't noticed before. If I turn on a cold tap like the one to the garden hose and ...
3
votes
3answers
2k views

What advantages does bending copper pipes have over joining many parts without brazing?

These questions are in context of a DIY solar water heater I am planning (another separate question). The copper pipes in question, are supposed to carry around hot water using thermo-siphon ...
5
votes
5answers
262 views

Is it possible to make my own solar water heater?

After blowing (what I consider) a lot of money on 2 residential solar water heaters, over the last 6 years, dealing with 3 set of rather expensive inner-tank replacements, evacuation pipe changes I am ...
0
votes
3answers
327 views

Is it safe to install this hot water tank from ebay?

Is it safe for me to replace my electric hot water tank with this continuous electric unit that I bought on ebay? (I'm in Australia) Technical Specifications rated power 6.0KW ...