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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1answer
13 views

Water Heater PRV keeps opening

I have a water heater that is 20 years old. When we turn up the water temp the pressure release value opens and drains water into the overflow pipe. The issue is this then overflows from the top of ...
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3answers
49 views

How should I install a new water heater?

I have recently shifted to San Diego. I am planning to install my own water heater. Can anyone guide me on below questions: Should I place my water heater next to furnace? Should I have a common ...
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0answers
13 views

Solar water heater size

I want to build my own solar water heater. It should heat about 20-30l of water per day to about 60°C. There is about 4-5h of direct sunlight to the place I thought of putting it. How big should my ...
2
votes
1answer
60 views

Dropped Item in hot water heater

When I was redoing the plumbing to my hot water heater I accidentally dropped a pen cap down the vent stack/flu. Will this cause any problems? Like melting or catching on fire? Its going to take a ...
4
votes
1answer
107 views

How bad is it to attach a gas water heater to a gas furnace electrical circuit?

I'm looking to replace my existing water heater with a more efficient model. One of the things that makes better models more efficient is the replacement of the thermocouple / pilot control system ...
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0answers
13 views

Do I need to replace the thermal expansion tank when replacing a water heater?

I'm considering replacing my water heater. My existing heater has an expansion tank attached to the top; should I look into replacing that at the same time or is the life expectancy on those longer?
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1answer
39 views

Why do high efficiency water heaters require outside air vents and drains?

All high efficiency water heaters seem to require PVC air intake and vent; the existing water heater I have doesn't have a drain connection or intake vent; only a traditional chimney. What are these ...
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2answers
64 views

How do I know when my water heater should be replaced?

The condo I just moved into has an original 2001 gas water heater that is missing a few features one would like to see in 2015, such as inspectable anodes. The home inspector pointed this out as a ...
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1answer
22 views

water heater vent

In the water heater closet, the water heater is vented through the roof. There is a vent pipe that goes through the floor in the same closet. What would this vent pipe be for and can I cap it off as I ...
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1answer
52 views

Do I need a regulator to connect a tankless water heater to a 20 lb. propane tank?

I am going to hook a tankless water heater to a 20lb propane tank. Do I need a regulator coming off of the propane tank?
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1answer
53 views

Hot water tank leaking at bottom could it go from a trickle to a gush?

My 20 yr. old gas water heater that's located in my basement has had a slow leak for 6 mos. My husband doesn't feel the need to replace it yet and feels we can just continue soak up the water with a ...
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0answers
28 views

water temperature varies in new hot water heater

I have a new house with a gas water heater and a recirculating hot water pump to have instant hot water at all faucets, My water temperature varies from luke warm to very hot. Some times the TP valve ...
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1answer
39 views

A line T-ing off my water heater drain line. What might it be for?

There is a line T-ing off of the DRAIN line at the bottom of my water heater and I don't know what it is for. It is UPSTREAM of the valve that I need to open annually to remove sediment from the ...
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0answers
20 views

water heater won't stay lit

Looking for suggestions on repairing my water heater. The pilot light won't stay lit. I've cleaned the air intake and checked the venting in the attic but it didn't correct the problem. It will ...
0
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2answers
34 views

What is the function of this electric part on my unvented water heater cold water inlet?

Does anyone know what this electric part does? In the photo it's the black plastic block device attached to the pipe on the right hand side (which is the mains inlet to the heater; the left is the hot ...
0
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1answer
59 views

Suspect water heater is using too much gas

Not sure if this sounds reasonable, but I think the 8 year old gas water heater in the place I just moved into last month is using more gas than it should be. Gas meter recorded 50 therms used last ...
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2answers
40 views

How to ensure that water heater is mostly on or mostly off?

My friend just rented an appartment (in the UK), and during the inventory the janitor showed her the programmable water heater, and said it was configured to turn on for a few hours during the day. ...
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1answer
52 views

Feedback on why constantly draining. It's starting to flood backyard

There's no leakage near/ around water heater. No slime or build up of any kind. But there's constant hot water drainage coming out through pipe in backyard. It's starting to flood back porch area. ...
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0answers
27 views

New water heater, now shower goes cold if hot water is used anywhere else in the house

We just replaced a 40 gallon water heater, power vent. The plumbing company said upgrading to code was needed for the plumbing of this water heater. We replaced it with an almost identical model, ...
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0answers
15 views

Water heater drips from top

Our water heater suddenly started dripping very slowly from the ring on top. The water does not seem to come from any water line. Is this normal as part of condensation or should we be worried? How ...
3
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1answer
52 views

Pressure problems with oil boiler

I've been having continued problems with the pressure in my home oil boiler rising to 30psi over time (and then leaking out the pressure relief valve). Technicians have examined it multiple times but ...
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2answers
72 views

Is this a Direct Vent Water Heater?

My contractor asked me to choose a direct vent water heater and have it delivered. I (generally) understand the difference between direct vent and power vent, having read up on how they both work. ...
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0answers
45 views

Could my water heater be causing an electric system failure?

My water heater, a Styleboiler VF 100 SE (1200W), has never had any problem. Recently I bought an electricity timer plug (up to 3500W) to put its plug into, in order to dose the amount of electricity ...
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0answers
31 views

Hot water twin impeller pump wiring to my boiler

I have installed a new Stuart Turner Monsoon twin impeller pump to increase the hot water pressure in my house. The pluming side of things seems to have gone well, however, I am not receiving any ...
2
votes
1answer
56 views

Can turning up the temperature of a water heater damage it?

I've got a 40 gallon water heater, and what I've been finding is that it provides just enough hot water to fill my sizable bathtub, but no more. Which means if I want to rinse off with the shower ...
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1answer
72 views

How can I check my hot water heater temperature? Isn't 120 degrees cold?

I'm trying to test the temperature of the hot water coming out of my hot water heater but I'm very confused. Can I use a meat thermometer or what should I be using? Also, just to make sure my ...
3
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2answers
54 views

Will having an expansion tank on the hot water pipe cause any problems?

I want to replace my water expansion tank and I just found out that it is installed in the hot water pipe coming out from the water heater. From what I've read, it should be installed in the cold ...
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0answers
40 views

Recirculation pump seems to be working, yet no detectable heat on return pipe

Our two-story-on-a-slab house has uninsulated copper pipes, including a recirculation return pipe to a tee on the water heater drain. In past years, the recirculation seemed to give us hot water ...
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0answers
57 views

Vaillant ecotec 28 boiler pressure problem

I have a Vaillant ecotec pro 28 boiler and the pressure is too high when the heating or hot water is on. It flashes at between 3.2 and 4 bar. After searching online the suggestions were to vent any ...
0
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1answer
21 views

Frozen water lines, what should I do with my electric hot water heater?

I woke up yesterday (Thursday) morning to frozen water lines. Left taps open all day and still nothing. I will not be able to get anyone in before Monday or Tuesday to thaw the lines. I don't know ...
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0answers
134 views

Why does it take so long for my water to run hot and why does it not last in the shower?

I have a State electric compact water heater model 6-120. When I run the faucet it seems to take a long time for the water to run hot. About a minute or two. When I take a shower I can run the hot ...
6
votes
5answers
791 views

Prewarming for tankless waterheater

I have a tankless water heater that is just a little bit to small for our new house - the temperature rise isn't quite enough for the winter months. Our basement is big and relatively warm so I struck ...
1
vote
1answer
211 views

Why does my shower run out of hot water quickly?

My shower runs out of hot water quickly. Initially the water is perfectly hot, then it starts cooling after a minute or so and we need to adjust the lever to maintain the temperature. Somewhere around ...
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2answers
75 views

How can I adjust the temperature of my hot water?

I live in California and the winter has been a lot warmer than expected. I would like to decrease the water temperature in my home to try to save money and conserve energy. How do I do this?
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1answer
60 views

Annual KWh usage of electric ignition on gas water heater

I'm shopping for a new gas water heater and looking at possibly purchasing a more efficient version with electric ignition. However, I'm curious as to whether some of the savings will be offset by ...
1
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1answer
68 views

What to do when the cold water valve on the water heater is welded on?

Our hot water seems to be running out faster than usual, and thanks to this site, we were guessing that we probably have a broken dip tube in our gas water heater. Unfortunately, someone in the past ...
0
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0answers
71 views

Direct Vent Water Heater Flue Exhaust

We recently moved into a property with 2 water heaters installed in the basement. During the inspection, we were told that the water heaters were relatively new, but the exhausts were "odd". ...
3
votes
1answer
676 views

Is there a specific NEC code specifying the distance between water heaters and electrical panels?

I have a condo in a large building with many identical units. Several times other owners have mentioned that the original layout of the utility room isn't up to code due to the proximity of the water ...
1
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1answer
166 views

Low dynamic hot water pressure throughout the house

I recently bought my first home, and the first thing we noticed is that the dynamic hot water pressure is pretty low compared to the cold water pressure. I purchased a water pressure gauge and found ...
0
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0answers
99 views

How to prevent sudden changes in water temperature (shower)?

I have an apartment in an older building. The boiler apparently was recently replaced by the building manager in the past few years, but every time I take a shower, the temperature changes are pretty ...
2
votes
2answers
357 views

Code for elevating water heater in garages?

A gas/propane water heater in a garage is elevated. This is to ensure the open flame (at the bottom) is above a certain height (?) to avoid any combustible fuels in the garage from igniting. This all ...
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vote
1answer
252 views

Can I connect my water heater pan drain to the building waste drain? (CPC)

This question is relative to the California Plumbing Code (CPC), specifically the Sacramento area. I'm doing some remodeling of a bathroom where the water heater pan drain line comes across the ...
2
votes
2answers
269 views

Legal water heater replacement

I'm looking to replace my water heater. I currently have a 15 year old 40 gallon gas water heater, and it's time to go. I had several quotes from local plumbers, and choked at the prices. I'm going to ...
3
votes
1answer
141 views

What disadvantages do thermostatic mixing valves have?

I will soon be buying a new water heater for my home. I want to set the heater to keep the stored water at least 140 degrees Fahrenheit (60 degrees Celsius), and use a thermostatic mixing valve to ...
1
vote
1answer
120 views

Merging water softener drain line to water heater relief valve drain line

I'm wanting to install a water softener. Can I merge the drain pipe from the softener with the line coming from the relief valve on the top of the water heater? I'm concerned about the elevation of ...
1
vote
1answer
235 views

Water heater on concrete--should I build a platform? how much heat loss in winter?

I don't know if that title the best way to phrase the question. It's winter(ish) now, and I swear the hot water just doesn't last as long as it does in, say, September. The water heater tank is ...
1
vote
2answers
73 views

Electric water heater leaks around the top, how do I fix it?

My water heater is leaking from the top around the copper fittings. It seems to be filled to capacity. Will adjusting my pressure relief valve stop my water heater from leaking? I turned the main ...
2
votes
1answer
180 views

When do tankless water heaters need to be descaled?

I had a Bosch tankless natural gas water heater that stopped working with C7 and EA error codes and the plumber indicated that the unit had failed due to water getting into the internals like the fan ...
0
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0answers
50 views

Strange configuration for laundry area needs solutions

We are being given the chance to buy the house we are renting, but I have some major concerns where it comes to the laundry area. You see, the washer hookup and gas hot water tank are in a closet ...
1
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1answer
74 views

Electric water boiler .. how is the system supposed to work? (UK)

I'm not from the UK and am used to water being heated on-demand by a gas heater. Having recently moved to London, the flat has electrical heating and I cannot figure out how I'm supposed to set this ...