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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How can I prevent a tankless propane on-demand water heater from freezing up in very cold climates?

We are considering installing a tankless propane on-demand water heater in a residential setting, where multiple tenants use a shared bathing facility (presently served satisfactorily by a 40 gal ...
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46 views

Why am I not getting hot water from my tankless hot water heater?

I just bought my house last year. The previous owner had just replaced the boiler before I closed. I had oil delivered the day that I moved in. I had problems with the hot water right away as it ...
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0answers
132 views

What dangers are associated with changing the pilot light assembly on a gas water heater?

My A O Smith ProMax gas water heater started going out at various intervals. I would re-light it and it might stay lit for a few minutes, few hours, or even a day or so. I figured it was the ...
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89 views

Without having a pressure regulator or gauge, how would we determine what psi to set our new expansion tank to?

Without having a pressure regulator or gauge, how would we determine what psi to set our new expansion tank to? We just replaced the tank and hot water heater.Before replacing them, had an ok amount ...
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1answer
151 views

Can I repair the floor in the water heater closet with an old street sign?

Can I use an old aluminum road sign as a replacement floor for my hot water heater closet? The old floor is rotten and has some give to it right where a portion of my hot water heater sits, and my dad ...
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472 views

Why did my hot water stop?

I have a Rinnai RL94 tankless water heater. Today something went wrong and now I have no more hot water. The machine is not showing any kind of error code like it has in the past when things went ...
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1answer
353 views

What is the life expectancy / MTBF of a 60 gal. water heater?

Specs: Capacity: 60 gal. Power: 4500W Voltage: 240V Warranty: 6 years
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39 views

How do I replace a damaged valve on a water heater?

Near the bottom of my hot water tank there is a plastic valve that looks like it is used for draining the water out of it. It has developed a hairline fracture along the length of it and small jets of ...
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1answer
72 views

What's with the different FHR ratings of these hot water tanks?

We're replacing our tank with a more efficient one and we can't go tankless given the cold input temperatures in Canada and the amount of output we need (for a triplex with 7 people). So I've been ...
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45 views

Is it normal for the steam-out of a electric thermo pot to melt down over time? [closed]

A few days ago, I discovered that some bars of the steam-out of my electric thermo pot (which has been used for about 2 years in my house) have been melted down. (Note: This is not the photo of my ...
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2answers
273 views

What could be causing water to drip from the relief valve of my new gas water heater, again?

I installed a brand new water heater about 4 months ago, noticed that that relief valve was dripping like crazy. Checked the expansion tank and it was filled with water. I replaced it with a brand ...
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192 views

Running Shower Faucet After Hot Water Heater's Off

I was awoke by a chemical smell from my electric hot water heater. The past two weeks I noticed my shower was not getting/staying very hot during my 10 minute showers. Thinking not too much about it, ...
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173 views

How to calibrate continuous water Gas Heater?

i have installed a gas continuous water gas heater, it is around 30 mts of pipe away. my shower has a mixer valve (one unique lever for both the hot and cold water). The problem is, whenever I am ...
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150 views
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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 ...
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389 views

How long will it be before my hot water heater blows up without a thermal expansion tank?

the county where I live put in the "check valve" or backflow device. Not sure, but I know they said you need to get a thermal expansion tank or the pressure could blow up the water heater. I spoke ...

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