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Questions tagged [hot-water]

Questions about systems that produce and distribute heated water.

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23 views

T&p valve on gas water heater

Put a new t&p valve on my water heater and as soon as it fills up the valve opens why would this happen?
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0answers
30 views

How can I diagnose galvanic corrosion on a water pipe?

I have a newly installed indirect hot water heater and two of the pipes are showing significant amounts of corrosion. Given that the installation is only 3 months old, I suspect that there may be ...
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0answers
45 views

Why do I have low hot water pressure in showers only?

I have 2 showers in my house. Suddenly the hot water pressure dropped in both. The cold is fine and we haven't noticed any change in the faucets in the house. What could make my hot water pressure ...
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2answers
35 views

How does hot water get circulated into an indirect fired hot water heater?

For an indirect heated hot water tank, the hot water comes from a boiler. Why are there two output ports on my tank? I have appended below a diagram of an HTP/Superstor tank to use as a reference: ...
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3answers
39 views

Which is cheaper? Tankless or Storage water heater?

We are planning to build a family house, 2 adult, 2 child, 100m2, eastern EU. We got stuck that what kind of water heating should we use. Where we use hot water?: shower kitchen sink in bathroom ...
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0answers
24 views

Do I need the “flow control” component on my furnace

Context: My furnace supplies tank-less domestic hot water to my small house. The cold water pipe going into the furnace has a "flow control" component that limits the flow to 3gpm. I understand that ...
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2answers
39 views

No electric current going into Water Heater

We bought a brand new water heater back in November. Came home last night to no hot water. Check circuit breaker and it wasn't tripped. Turned it off an on anyway. Nothing. Hit reset button on ...
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1answer
40 views

Shower hot water not getting hot enough

I left my house unattended for a number of months. Before leaving, I turned off the water to the house and drained the lines. This was during the winter. Anyway, now that I am home, I notice my ...
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3answers
81 views

How does water flow through my water heater and up to the top floor without a pump?

My house has a gas based water heater(geyser) on the outside. The plumber has connected it such that without the use of electric pump, just through pressure alone, hot water reaches the 1st and 2nd ...
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1answer
199 views

Why does shutting off cold water valve to the water heater shut down cold water in entire house?

I'm a new homeowner so maybe my understanding is off. My question is, why would turning off the cold water intake valve on the top of the heater turn off cold water to the entire house after about 12 ...
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1answer
31 views

Why don't I have hot water after shutting off the water supply for a while?

I have a 240 watt State Select 40 gallon water heater. I shut off the water supply for maybe 6 hours to replace faucet seats in the shower. I turned off wrong breaker, and 2 days later no hot water ...
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1answer
59 views

How to switch off/on a Hot Water System

I believe I have what is called a gas-boosted, solar HWS (although there is only one solar panel on the roof). On the outside of my system, apart for the valves/pipes/wires leading into and out of it, ...
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0answers
25 views

Lukewarm water in bathroom

I recently moved to a new flat. The hotwater is supplied by a electric heater located in the kitchen which is directly next to bathroom. In the bathroom, the tap for the shower doesn’t get hot to run ...
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1answer
31 views

Iron in Hot Water Heater

My water has a lot of iron in it so I have a water softener to take care of that. The problem is I forgot to check it and it ran out of salt. The majority of my house is fine (I have to better clean ...
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0answers
18 views

Hot water heater intake is very close to an outside faucet: how terrible is this?

My new house has an outdoor spigot which is supplied by the same copper pipe as my hot water heater. (There's no cut-off valve for the outdoor faucet individually!) Going backwards, the pipe from the ...
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0answers
18 views

Hot water comes through cold after turning off and on

I have a combi boiler providing hot water in my house. If I run the hot water (e.g. in my shower or kitchen sink) it comes through hot just fine after a couple of seconds and stays hot however long ...
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2answers
87 views

Hot water recirculation pump suggestion in home with return hot water line [closed]

We had a hot water re-circulation pump by water heater before and had it removed last December when we detected leaks around it. This is our setup: We have a return hot water line coming back to the ...
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0answers
42 views

Cold water handle overpowers hot water

In trying to fix a leak in my shower head, I ended up replacing both the hot and cold stems for Price Pfister handles. First, I replaced the hot water stem, which seemed to reduce the leaking. But, ...
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1answer
52 views

Why would the cold feed be backfeeding hot on a hot water heater?

The cold line is "upfeeding" hot. Both of the pipes running out of the hot water heaters(dual system) are hot. When we run the hot, it gets cold again. The cold feed pipe is hot until it reaches the T ...
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0answers
89 views

electric hot water heater high limit switch repeatedly opening

The problem I am in the southeast US and have an electric hot water heater that is 25 years old (as is the house). Two years ago, I diagnosed and successfully replaced the lower thermostat. Earlier ...
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4answers
126 views

New electric hot water heater, hot water turns luke warm after 12-15minutes of use?

Converted my oil burner to a gas burner and added an electric hot water heater. When i use the shower the hot water turns to luke warm in 12-15 minutes. It was installed by a professional plumber and ...
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1answer
25 views

water heater - flow problem

got a new 3 liter instant water heater installed. When the heater is off, water flow is normal. When it is on, about one liter or so hot water flows and then there is no water. What might be the ...
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1answer
17 views

How to remove thermocouple from this manifold door?

It has a black object that seems to be secured down by a U shaped clasp. I cannot see how the clasp can be removed. Everything is tight and doesn't appear that a tool can fit anywhere to loosen it up. ...
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3answers
72 views

Small electric water heater below sink to get instant hot water?

There is quite long pipe going from the gas water heater to our kitchen sink. This means that there is a delay before hot water actually becomes hot, especially in winter months. Now I saw that there ...
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2answers
93 views

Will increasing the temperature of my hot water cylinder's thermostat make my shower water supply last noticeably longer?

I have an unvented electric immersion heater cylinder which heats the hot water for my household. The capacity is 200L and the temperature is set to 55°C. The water heater is hard-wired to run ...
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1answer
100 views

Hot water tank cold water is always flowing

My hot water tank cold water is always flowing and it's losing water out of the temperature valve relief tube on the cold water intake side (see attached photos). I just noticed this, but it could ...
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3answers
173 views

How do I bleed a noisy radiant heat system?

I have a gas fueled (converted from oil just a few years ago) boiler in my basement with an integrated tank-less water heating system for the showers/taps/etc. The output is three zones as shown in ...
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1answer
81 views

Should I turn the water off to my home during a winter absence?

I will be leaving my home for three months, during winter, where I can expect the weather to go below freezing. My question is if I should turn off the main water valve in my house or just to the ...
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1answer
76 views

How to check and turn on pilot light of this water tank?

I have never done this before but the gas line was turned off briefly and now we have no hot water. Look like the pilot light went out on this but I have no idea how to see the light and how to turn ...
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1answer
970 views

Hot water is not getting hot in kitchen sink only

The hot water valve is open and the water comes out but it stays cold. We shut off the cold water valve and it made no difference (besides obviously when you turn to cold side no water pours). We ...
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1answer
36 views

why won't my shower regulate water temperature

a couple days ago this started. no matter what position I turn the handle towards the left it's always very hot. and the same if I turn it to the right. very cold. I'm assuming there must be some sort ...
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1answer
40 views

Temperature monitoring for storage hot water system (RP-2 connection)

My HWS has a secondary outlet connection I don't use, and I'd like to use it to install a thermal probe I can monitor. HWS RP ¾ / 20 temp probe? Does anyone know of a practical way to install a ...
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1answer
313 views

In-floor radiant heating hooked up to hot water tank in new home - questions about how it works and operating it

I've moved into a new 2 story house. The heating system is in-floor water heating, and the heat source is an electric hot water tank. I'm hoping you guys can help me figure out how the system works ...
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1answer
1k views

How to shut off water coming from the hot water heater

I'm trying to shut off water coming from my hot water heater. I currently have the water shut off to the entire house due to a shower repair that went awry (hot water flows like a shower even though ...
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0answers
301 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
271 views

should i wrap exhaust duct joints of hot water heater?

i replaced my hot water heater. I used a single flexible 3" metal duct tube to go from the new unit to a an old "y" connector metal duct that is near the ceiling in the utity closet. I noticed ...
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1answer
54 views

Activating hot water recirculation pump in garage via extension cord under kitchen sink

I have a hot water recirculation pump installed near the water heater that is located in the garage which provides instant hot water via dedicated 1/2" copper pipes. Although I have a timer that ...
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1answer
45 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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0answers
37 views

Isolating water supply to replace basin tap with no local stop valve

I got a new tap for a pedestal basin. Looking at the existing fittings there is no local valve to shut off the water at the basin itself where the water pipes come out of the wall & connect to the ...
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1answer
139 views

How can I drain the hot water line in my house? (re: adding a spigot)

I'd like to add a hot water spigot to the outside of my house but my hot water heater doesn't have a shutoff for the output (ie. hot water side of plumbing). However, the cold water has a shutoff (...
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2answers
91 views

Replace electric water heater with gas tankless (electrical connection)

I want to replace my electric water heater with a gas tankless water heater. My current water heater like most electric hot water heaters takes 220 and the tankless gas water heater uses 120. The room ...
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0answers
56 views

Sink water won't get hot unless shower is on

The sink tap takes 20+ minutes to even get lukewarm, never hot. I have lived with this for a while until I made an interesting discovery the other day. When the shower (in the same bathroom) was ...
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2answers
139 views

Shower in another room leaks when bath is running

I have a free-standing bath in my bedroom and a separate shower stall in an adjacent room. When we run hot water in the bath the shower head starts running-- not just a drip... more like moderate ...
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1answer
55 views

what allows some cold water to enter house and some to enter water heater?

Informational question: To supply hot and cold water to a house you: 1. split at the supply for hot and cold lines. Using a tee - you run one line to the house, and the other to the water heater. My ...
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1answer
879 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
49 views

Changing hot water supply and keeping cold water supply

Repiping my master bathroom shower and sink. We have a new instant hot water heater on an addition to our house 10' away. The shower and sink now run off the water heater in garage, 100' away. I tee'...
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2answers
123 views

Why my new hot water heater performs worse than my old one?

I know a lot of posts have been made on this topic, but, I have tried everything. I wanted to move my hot water tank from the first floor of my house to the crawl space. My old unit was performing ...
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1answer
75 views

Where to place an aquastat that is external to the hot water tank?

If you need to retrofit an aquastat to a heating system what is the best way to do so? i.e., in some hot water tanks or even boilers there may be a purpose-made port specifically to accept a "well" ...
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1answer
41 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
49 views

Why isn't my electric hot water tank producing hot water?

We just bought a trailer and had the water turned on. We have cold water coming out of hot water side in kitchen and bathroom. What could this be? Also we have good water pressure in the bathroom but ...