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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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What is required clearance from mechanical exhaust to garage door?

I'm looking to add a new tankless water heater, which allows for pvc exhaust. In California, USA, I think clearance requirements for a door is four feet horizontally or one foot vertically. Does this ...
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1answer
29 views

Hot water heater T&P discharge going into furnace condensate pump?

I recently had some electrical work done at my house, and as part of that, the power was shut off. After a few minutes, we noticed water coming from the closet containing the hot water heater and ...
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31 views

Is it normal for the sight port of a water heater to ever have condensation in it?

Is condensation in the sight port ever a "normal" occurrence? Or does that mean the pan at the bottom is flooded. I only see condensation, and it won't stay lit. I called plumber out, and he said ...
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24 views

No hot water in only one bath tub

We are not getting hot water in only one bath tub. The left side is for hot water and right side is for cold. There is no drop in pressure when I turn on only the left side. But instead of hot water ...
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1answer
15 views

Trying to identify cause of minor leak from water heater TPR valve

A few days ago I noticed about a capful of water in the pail at the bottom of my water heater's TPR valve outlet. This is the first time I've had any water come out of the TPR when I wasn't testing ...
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1answer
41 views

Turning water off to house for a vacation, does furnace need to go off as well?

I am going away for a week, I want to shut off all water to my home. I have an oil furnace, with a separate water boiler (connected to the oil furnace - there is no gas in the house). It is summer in ...
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1answer
183 views

Got Red Tag warning from gas company for hot water tank (Canada)

Gas company technician asked me to take a look at hot water tank and there he issued me Warning B Red tag and gave me 5 weeks to fix the issue. Issue in related to clearance from combustibles (TSSA ...
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1answer
32 views

Gas Water Heater will be permanately out of service

Gas Water Heater will be permanately out of service. Pilot & Gas is shutoff. Should I drain the water or leave it or does it matter at all?
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1answer
53 views

Why does my water heater stop heating when some outlets don't have power?

I just bought a house 2 months ago. The water heater has been working fine until now. We experienced some receptacles in our kitchen coming in and out (meaning they'd work and then quit, work and then ...
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1answer
37 views

Hot Water issues in entire apartment, How can I fix this?

We lease an apartment and the maintenance has been less than effective at fixing this issue so was wondering what other people think about it. We've got 2 showers and 3 sinks, this issue is happening ...
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2answers
28 views

Separate or combined boiler and hot water heater

I'm looking to replace my boiler and hot water heater. For background, I live near Boston, my home is about 2000 square feet, we have gas for heat, stove, and dryer, and we are two people in the ...
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1answer
28 views

Under Floor Heating (Wet) - pipe coupler under the screed?

I want to fit UFH to a whole house - normally it would be an easy process if one could just move out and live somewhere else as the whole house gets gutted and re-done. However, ideally, i want to fit ...
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2answers
39 views

Water hammer, PRV, and safe water pressure at water heater

Our main water line into the house was making a loud whining noise whenever a shower was on, so we had a plumber come out and they decided to replace the PRV (which appeared original to the 1970's ...
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23 views

Condensate Neutralizer Refill

For a tankless water heater and whole house boiler there is a neutralizer installed in my boiler room. It has not been refilled in more than a year. After some research I found out that I should use ...
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4answers
84 views

Gas-fired water heater safe to have in living area of home?

A un-licensed renovation on our house was performed about 15 years ago, which turned a former garage into a 200 sq ft den directly attached to the rest of the house. In this den is a gas-fired water ...
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36 views

Gas Water Heater Problems

I left my hot water on all night by accident. Now the water is EXTREMELY hot and the floor above the water line is warm. When I turn on the cold water, the first 10 seconds or so, hot water is coming ...
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2answers
141 views

Water heater flush yielded almost no sediment

I did a water heater flush by turning off my heat down to the pilot light only and setting it to pilot instead of on, let it sit overnight. I then opened the stock drain valve and let it drain until ...
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1answer
146 views

energizing both elements of electric hot water heater

I'm considering using an electric hot water heater (EHWH) with upper and lower heating elements as an electric diversion load. This EHWH would be for pre-heating the water bound for the standard HWH....
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1answer
161 views

Have Gas Water Heater…Wondering If It Needs to be in a Closet

I received a "gift house" from my father-in-law a few years ago. A lot of the problems have been repaired over the past few years, but I have a major one that keeps kicking my butt. The previous ...
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1answer
166 views

Will an expansion tank and water pressure regulator work over periods of non-use?

I have high water pressure coming into my house (~110psi) and a backflow preventer at the source. I do not currently have a pressure regulator or an expansion tank installed, though I'm considering ...
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1answer
76 views

Parallel Water Heaters, One Doesn't Run

I have two water heaters (different brands) running in parallel. When I run hot water in the house only one tank will drain while the other sits there full. I have manual shut off valves so if I close ...
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1answer
36 views

Water heater wont work

My gas water heater wont heat until I turn it up to nearly all the way to the maximum temperature, indicated with letter "C" in the image. If I turn it down lower than "C" the gas flames stop and the ...
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0answers
20 views

New (combi) boiler: should I go for integrated or detached hot water thank

I got some estimates for a new boiler, price is almost the same, but one comes 'split' in two: the 'burner' on one side (that includes the 3-way) and a 80L thank. Other is a 'combi' that has both ...
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1answer
31 views

Best Water-Heater Location

Is it OK to install a gas water heater next to a gas dryer and if not what are the cautions? Both will be vented. Thanks
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1answer
34 views

Copper reducer before hot water heater

My house copper lines are 3/4 in and my new water heater accepts 1/2 copper in a compression connection. Is there any issue with adding a 3/4 to 1/2 reducer before and after the heater?
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1answer
42 views

what is a reasonable amount of condensate water produced by my pump?

I have a Ruud hi-efficiency furnace and also a Ruud tankless hot water system, both with condensate lines running down to the pump. My problem is... the pump runs (intermittently) ALL day long..lol.. ...
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2answers
49 views

Slow faucet when water gets hot

I appear to have a strange problem. For the last 6 months, at least, in my master bath the sink faucet pours slowly when the hot water reaches the faucet itself. That is, If the pipes have cooled ...
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2answers
93 views

Can I connect an Asian 240v water heater to a US 240v circuit?

How can i wire directly an Asian single 240 volt line with neutral instant hot water heater to my 240 twin line tap in the United States? Can i tie the two legs on the breaker into a single wire? I ...
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3answers
158 views

Why is my water heater's relief valve popping?

I haven't seen it, but there is water on the floor and also on top of a hose that is rolled up next to the water heater. It is a A.O.Smith electric ECS 40 200. Both upper and lower thermostats are ...
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0answers
158 views

Why with new hot water heater and now master shower hot water runs out fast?

We bought a new hot water heater 6 months ago and it was working great until recently. Lately, only in the master shower the hot water lasts for only a few minutes then cold. Sometimes it won't even ...
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1answer
62 views

What is the effective difference between an inline air separator vs a air vent at the high point in a recirculating water system?

My tankless water heater manual suggested the recirculating set up shown here: It appears there are 2 air vents, but one is attached to an air separator. Do I need both an air vent upstream of ...
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2answers
826 views

Removing Seized Anode Rod From Water Heater

We have an electric hot water heater (GE branded Rheem) that may date from the mid-90s (based on the energy usage tag). It was boxed in and I was finally prompted to open up the wall concealing it ...
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27 views

which element is defective on a hot water heater

It looks like my lower element on my hot water heater is not working as I have luke warm water, and if I use a lot of the luke warm water, next time i use water it is very hot for awhile. Then goes ...
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0answers
123 views

Water Heater Dielectric Heat Trap Nipples

I'm cleaning up the installation of our hot water heater and will be installing new inlet/outlet nipples. In addition to "plain old dielectric nipples," I found some "heat trap nipples" that claim to ...
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4answers
115 views

Which of my water heater's thermostats is broken?

I've got a dual-element, dual-thermostat electric water heater. One of the thermostats is stuck in the "on" position: it heats the water until the high limit switch trips and cuts off all power. How ...
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1answer
58 views

Why my hot water goes out in less than 2 mins? [duplicate]

All the water outlets in my condo can only supply hot water for at most 2 mins and then I am left with cold water. I changed my gas water heater 2 days ago, but the problem continues. I was desperate ...
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0answers
51 views

What Pex system and re-design would you use for this small bungalow update - Floor Plans Attached?

There is a small Bungalow in the Midwest that I have attached two new design drawings for. Its a smaller 740sqft home with a 1st floor and current unfinished basement. I wanted to see if the group ...
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3answers
103 views

71 gallon water heater doesn't maintain hot water

Hoping someone can give me some thoughts on what might be going on here so I can be a bit more informed when I call a plumber. Situation is, we got our water heater replaced a few years back and ever ...
5
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1answer
115 views

How are sacrificial anodes electrically bonded to the water heater?

I was thinking about the sacrificial anode in my hot water heater. It screws in via a hole on the top of the unit. Every time I've made a threaded plumbing connection, I wrap Teflon around the ...
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3answers
244 views

Elevating a water heater to avoid damage during flooding

I have read another thread concerning the elevation of electric water heaters but nothing seemed to address my particular situation: I live on a barrier island and it floods here every couple of ...
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1answer
236 views

Why does my water heater's drain line rejoin the outlet pipe?

I know very little about water heaters and plumbing. Done some minimal work, but never water heater hookup. I need to replace my 20 year old AO Smith 50 gal gas water heater in a house I've owned ...
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3answers
102 views

Is it safe to keep using this 30amp safety breaker for water heater?

First of all this is the technical data written on the heater: I've been using the following connection for my water heater for 2 years before the switch key got molten as shown in the following two ...
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2answers
147 views

Do I need separate expansion tanks for my boiler and hot water heater?

My hot water tank went and I'm trying to replace it with a tankless system, but the old water heater did not have an expansion tank installed with it. In my previous house I had a combination unit ...
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1answer
143 views

Green crust around water heater exit pipe

As shown in the picture, I have green crust at the elbow of the copper exit pipe (I'm assuming its the exit pipe because its warm to the touch and encased in pipe insulation) coming out of the top of ...
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1answer
28 views

Anode Rod replaced but short on hot water

We just had our anode rod replaced on our 8 year old gas water heater. Water starts very hot but cools down quickly. Able to put hand under it after a couple minutes without being too hot when running ...
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2answers
104 views

How do I get more shower flow volume?

We just moved from our old house which had great shower pressure to our new house which is pretty pathetic. I'm trying to figure out what/where the problem is. The old house was built about 40 years ...
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1answer
2k views

Why did a failing water heater emit an electrical burning odor?

Our electric water heater seems to have burned out, but the breaker didn't flip off. My husband smelled an acrid burning smell in the house and traced it to the water heater, which is in the bathroom. ...
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1answer
39 views

Can a hot tub be installed in a utility room?

We just bought a house with a large, unfinished utility room in the basement, about 15 ft x 20 ft. The previous owner just used it for storage. It has washer/dryer hookups and contains the furnace and ...
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3answers
308 views

No hot water (at all) on upper floors

A few days ago, the bathrooms on the 2nd and 3rd floor of my townhouse stopped getting any hot water. Nothing comes out of the faucets when they are turned all the way to the hot side. The cold water ...
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2answers
365 views

Is my hot water circulation pump plumbed correctly?

Read some related questions here but none of them seemed to address my exact problem: Bought a house this year that has the water heater in a closet near all the bathrooms. The only long run goes to ...