New answers tagged

1 vote

Does missing expansion tank and check valve explain non-functioning circulating pumps?

If you don't have a check valve near the pump, then there should be a thermostatic valve somewhere else far away. They are usually installed under a bathroom sink. That valve might be disabled or ...
user avatar
  • 18.8k
2 votes

Does a hot water dispenser heat water by itself?

The makers website has a photo that includes the under-bench component that heats the water. https://insinkerator.emerson.com/en-us/shop/insinkerator/insinkerator-sku-44719 Usually when water needs ...
user avatar
  • 13.2k
4 votes

Does a hot water dispenser heat water by itself?

This type of device has a small storage tank. It heats water in the tank to around 200 F. Where a typical whole house water heater has 30 to 50 gallons, this has a 0.7 gallon tank under the sink. ...
user avatar
0 votes

How does the sensor in a hot water circulation system inform the pump to turn off?

I presume that you are referencing a system that does not have a dedicated return line. These "newer" systems use a "sensor valve" (not mentioning brands, this is often referred to ...
user avatar
  • 33.4k
1 vote
Accepted

What kind of water pump should I use to supply a tankless water heater from a non-pressurized water source?

I'd use something like that: It's a pump with an output pressure of around 4 bar (60 PSI), a pressure tank, and a pressure switch. When pressure in the tank drops, it starts. When pressure is ...
user avatar
  • 5,893
-1 votes

What kind of water pump should I use to supply a tankless water heater from a non-pressurized water source?

I think most answers and comments are off base here. A tankless WH is normally supplied by pressurized water (municipal or well) at somewhere between 30-60 PSI. The actual flow is controlled by the ...
user avatar
0 votes

What kind of water pump should I use to supply a tankless water heater from a non-pressurized water source?

Most likely, the heater has no ability whatsoever to regulate flow. The way these heaters work, they are injecting heat into the water at whatever rate they're capable of. If you flow water through ...
user avatar
0 votes

What kind of water pump should I use to supply a tankless water heater from a non-pressurized water source?

Using the information from the unit similar to the one you have, your pump shouldn't exceed 1.4 gallons per minute or you won't get the hot water you're setting the unit to provide. There are pressure ...
user avatar
  • 53.8k
2 votes

What kind of water pump should I use to supply a tankless water heater from a non-pressurized water source?

If you exceed the GPM rating of the heater, the water will not get the specified temperature rise that you are probably counting on. In the listing your provided it says: A 2GPM portable tankless ...
user avatar
  • 20.4k
0 votes

Do tankless under the kitchen sink 110v water heaters any good for instant warm water?

If you can turn down the temperature (most of these are set far too hot, just below boiling, for hand-washing), and are satisfied with perhaps a liter of hot water, it should work. It might take ...
user avatar
3 votes

Do tankless under the kitchen sink 110v water heaters any good for instant warm water?

No, they're really not. True tankless on 1500W (max plug-in power) is actually a hard problem, because physics is against you. You cannot deliver enough BTUs to do the job. That's why they're not ...
user avatar

Top 50 recent answers are included