New answers tagged

0 votes

How to avoid the rapid contamination of filters in a recirculation shower?

In swimming pools this is dealt with by backwashing the filters periodically to clear them, and by adding sanitizing chemicals (chlorine or bromine, traditionally, sometimes ozone these days) to break ...
  • 19.3k
2 votes

How to avoid the rapid contamination of filters in a recirculation shower?

You would never do such a thing for sanitary reasons. You would use a heat exchanger instead, by which cold water for the shower is pre-heated by water headed down the drain. Thus the remaining heat ...
0 votes

How to avoid the rapid contamination of filters in a recirculation shower?

Simplify. Put the "regular drain" in the bottom of the reservoir, with a plug you can operate easily from above. Clean yourself off with the plug open, then plug it and fill, then switch ...
  • 158k
0 votes

How to avoid the rapid contamination of filters in a recirculation shower?

Seems that you could treat this a little like a swimming pool/spa, or a lot like one. Bathe yourself with fresh water; send that water along with soaps and other contaminants down the regular drain. ...
  • 22.7k
5 votes

Why do the seismic straps need to go at least 4" above the controls on water heater?

So that the lower strap is not too close to any opening in the tank for the controls. The instructions are based on testing/experience with the location of sensors and their bosses to avoid breaking ...
  • 23.5k
9 votes

What is an expansion tank for?

It depends upon your water supply. Like Ruskes said, when water gets heated, it expands. If you are on a well or water system w/o a check valve, the supply simply gets fed back the tiny amount of ...
1 vote

Can a 30 gallon water heater use a 25 amp breaker?

It is large enough for protection of most residential water heaters, but may be too large to provide adequate protection. Breakers are selected to stop excessive flow, they don't push power. The ...
6 votes

Can a 30 gallon water heater use a 25 amp breaker?

Depends on the wattage of the elements, not the size of the tank. I have a 40 gallon which only calls for 25A (4500W elements, 18.75A continuous load, derates to 23.4A - too much for 20A but does not ...
  • 158k
6 votes

Is it a good idea to place an electric boiler on the warm water line?

First, I would actually measure your numbers. Because I find 15l of water in the pipe to be non-believable. That's 100m (300'+) if the pipe is 3/8" trade size, 60m (200') if 1/2" pipe, and ...
6 votes

Is it a good idea to place an electric boiler on the warm water line?

Point of use water heaters are a common solution to the problem you are trying to solve. Most operate on 120 Volt and can plug into a standard outlet and take about 12 amps. You can set the ...
  • 66.5k
0 votes

Is it a good idea to place an electric boiler on the warm water line?

One method is to run the hot water supply as a "loop" and each faucet is a small tee off the loop. Then a small pump that drives the flow from and back to the tank will have water to each ...
  • 23.5k
3 votes

tankless water heater low noise off and on all night

Even the most basic modern gas fired tankless water heaters designed for exterior installation in cold climates have an electric heater in them to prevent freezing of the water in the core. There may ...
  • 19.8k
1 vote

Why is there cold water when flushing sediment from water heater?

To add to the answer by crip659, if the final temperature is as desired then it is not the hot water cylinder. It has minimal say in the water flow. The things affecting the flow/lag are Water ...
5 votes

Why is there cold water when flushing sediment from water heater?

Cold water is piped to the bottom of hot water tanks and pushes hot water out at the top. Whenever water leaves the tank, cold water enters at the bottom. Depending if the cold pipe is close to the ...
  • 14.7k
1 vote

Which elements should I buy for my hot water heater?

The best and easiest way to check a heating element it to leave it connected, set your meter for AC voltage and carefully measure across the two terminals. If your water heater is 220v and your meter ...
  • 11
0 votes

New and old hot water tank same issue - quickly cooling water

First idea: the service technician lowered the thermostat setting (just turn it to 60°C or hotter, otherweise hot water will just not less). Another idea is that the hot "delivery" pipe, if ...
  • 2,234
3 votes

New and old hot water tank same issue - quickly cooling water

If you have an older home with cast iron pipes your gas line could have blockage in it or breakdown of the inside of your gas pipe line could be causing particle build up in your devices. IF your ...
  • 322
0 votes

Propane vs electric water heater energy cost

Man, are you guys overthinking this or what? it all depends upon whats more expensive, electric or nat gas or propane. BUT and here is the big BUT if you have regular power outages there's no way ...
3 votes

Propane vs electric water heater energy cost

TL;DR You're doing better than EnergyGuide While you might think it is all BTUs (or all kWh, which is used in some places), but that is not what the EnergyGuide ratings are about. Actually, I think ...
3 votes

Propane vs electric water heater energy cost

Government regulations are funny. Because Energuide labels follow regulations written prior to February 24, 2022 when the Ukraine war blew up, weirdly re-shaping the energy market. In particular, the ...
3 votes

Furnace draft inducer switch tripping

The water heater is a condensing one. It should not be vented through galvanized metal pipe or through an existing chimney or through a common vent. It says these things in the installation manual. ...
  • 23.7k
7 votes
Accepted

How do I prevent a water heater pilot light from blowing out on windy days?

As wind blows against a building some areas experience a rise in air pressure and other areas experience a drop in air pressure. That difference in pressure can cause a surprising draft through the ...
  • 22.7k
3 votes

Can I replace a 30 amp double pole breaker w/ 60 double pole breaker for tankless? Breaker is tripping

So you didn't check the power requirements of the electric tankless water heater and now you're feeling the effects of that. To answer: NO NO & NO, you can't just upsize a breaker because it's ...
5 votes

Can I replace a 30 amp double pole breaker w/ 60 double pole breaker for tankless? Breaker is tripping

You will have to replace the wires from the panel to the heater too. A 30 amp breaker probably has #10 AWG connected to it which is only good for 30 amps. Your new heater will require 54 amps which ...
  • 66.5k
3 votes

Can I replace a 30 amp double pole breaker w/ 60 double pole breaker for tankless? Breaker is tripping

Only if you also replace the wires/cable. The wire gauge for 30 amps is 10 gauge. 60 amps will burn up that size and can start a fire. Will need at least 6 gauge wire for 60 amps(per maker directions)...
  • 14.7k
1 vote

Proportional circulation pump control - possible for "simple" pumps?

There are quite a lot of these modern controllable variable-speed circulators available on the used market. I bought a few and saved quite a lot of money, so you might want to try that. They're ...
  • 8,039
1 vote

Proportional circulation pump control - possible for "simple" pumps?

In theory, a common way that buildings would control a similar system is with a Variable Frequency Drive (VFD). Basically, you just have a drive between the power source and the motor that reduces the ...
  • 141
2 votes

Can I re-use an existing (and non used) water heater vent for a dryer?

Wouldn't count on it. Dryer vents do a very different job. Their job is to eject large volumes of heated, now very wet air. The operative word is "large volumes". It is way too much flow ...
1 vote

Can I re-use an existing (and non used) water heater vent for a dryer?

You need to check the instructions for your dryer. Water heater exhaust and gas dryer exhaust both have hot air, carbon dioxide and various pollutants from burning natural gas. An electric dryer just ...
0 votes

What is the impact of outside scaling on the heat exchanger of a tankless water heater?

By performing close evaluation, you can determine is it calling or corrosion. If it is scaling you have a leak somewhere. Usually the corrosion is also accelerated by humidity/leak. If you are ...
  • 8,786
2 votes
Accepted

Should expansion tank be installed before or after water softener?

You want the expansion tank immediately before the cold water inlet to the water heater. The water in the tank expands due to heating and the hot supply side doesn't leave much room for expansion. ...
  • 4,473
2 votes

Condensation and Ice at Exhaust Vent for Tankless Water Heater

TL;DR summary: the plumber is correct that the condensation is expected, but you too are correct in wanting it to be managed better. Try adding insulation and maybe pipe heat cable. Condensing ...
  • 22.7k
0 votes

Condensation and Ice at Exhaust Vent for Tankless Water Heater

I'm willing to wager that your problem is you still don't have the 2% slope. The reason a 2% slope is required is that with a lesser slope the water that condenses in that section will be pushed ...
  • 20k

Top 50 recent answers are included