I am not sure what it would be called, but it is like a rubber badder inside the water tank that holds the water in when you flip it over to put it in. It is about an inch diameter. I rigged it to work last night, but I would like to replace both of them. do you know if those are avalible for purchase?

If the water overflows from the water holding well in your Essick D46720 humidifier, there could be a few possible reasons:

1. Faulty Float Valve: The float valve regulates the water level in the holding well. If it gets stuck or fails to function properly, it can cause the water to overflow. You can try cleaning the float valve and make sure it moves freely.
2. Clogged Water Inlet: Check the water inlet on the bottom of the humidifier. If it is clogged with mineral deposits or other debris, it can prevent the water from flowing into the holding well at the proper rate.
3. Broken Water Tank: If the water tank is cracked or damaged, it can cause water to leak out of the holding well and overflow.
4. Incorrect Water Level: If you are filling the humidifier beyond the recommended water level, it can cause the water to overflow.

To fix the issue, try the following steps:

1. Turn off and unplug the humidifier.
2. Remove the water tank and check for cracks or damages.
3. Clean the float valve and make sure it moves freely.
4. Check the water inlet for any clogs or debris.
5. Make sure you are filling the humidifier with the correct amount of water, as recommended in the user manual.
6. Plug in the humidifier and turn it on to see if the issue is resolved.

If the problem persists, you may need to contact the manufacturer for further assistance or consider replacing the humidifier.

Here are the steps to fill the water tank of the Air Innovation humidifier model A1-KS30U-06C:

1. Turn off the humidifier and unplug it from the power source.
2. Remove the water tank from the base of the humidifier by lifting it straight up.
3. Flip the water tank over and unscrew the cap from the bottom of the tank in a counterclockwise direction.
4. Fill the tank with clean, cool water. Do not overfill the tank; leave some space at the top to prevent spills.
5. Screw the cap back onto the bottom of the tank in a clockwise direction until it is snug.
6. Turn the water tank right side up and carefully place it back onto the base of the humidifier. Make sure it is seated properly and securely.
7. Plug the humidifier back in and turn it on.

Once the tank is filled with water, the humidifier should operate normally and begin adding moisture to the air. It is recommended to clean the water tank periodically to prevent buildup of mineral deposits and bacteria.

is the rubber seal in place on the cap or did you lose it could be a small crack where the threads are look for both , good luck

Just purchased a Idylis model 0484756 and it has no
operators manuel. Is there one available?
Where?
Thanks

Ensure there is water in the tank.

• This may be caused by mineral deposits in the water channels. Try the following: Clean the water tank, base and vapor nozzel with a damp cloth to remove any build up in the water channel.
  
• When was the last time the cartridge was changed. (If it’s been over 3 months, this could be the reason why the unit is not working properly.)
  
• Unscrew the demineralization cartridge and run the unit, if it starts to mist then you need a new cartridge. (insert cartridge link here)
  
• The screw cap for the water tank, onto which one first screws in the demineralization cartridge, has a small rubber gasket. make sure that gasket is not too far down against the outer screw cap. If it is the spring loaded button would not work properly to let the water descend into the base tank .
  The solution: push up on that small rubber gasket so that it is as far up and away from the screw cap as it can be without falling off, and voila! you get mist!!
  
• If you have changed the filter recently then take out the cartridge and run the unit without the cartridge for about 15 to 20 minutes.

I had the same problem with my Holmes HM5601 humidifer unit - right out of the box. I almost returned the unit to the store, but was able to figure-out the problem. Not enough water had been filling the heating section (where that black knob-like protrusion is) and the lack of enough water had caused the unit to shut-off soon after plugging it in. The problem is in valve at the bottom of the water tank! The valve is a factory defect. It needs to open more when you sit the water tank onto the base so water fills the reservoir. I had solved the problem by going to the hardware store and purchasing some small, rubber pads or feet. These rubber pads are the type used to place under things where you want to protect a table-top from being scratched or you want the item not to slide too easily on a table-top. These rubber feet or pads have an adhesive on the bottom of them. Find the size that matches the diameter of the valve stem on the bottom of the water tank. Once installed, the valve should open and close with your finger without the rubber pad interferring with the operation of the valve. The pad, if installed properly, makes contact with the water reservoir base when you placed the water tank down onto that base. The valve open a bit more allowing water to pass-thru and fill the water reservoir. Water fills the heating section as needed and the unit runs perfectly after! The round rubber pad I had used was about an 1/8 inch thick and 1/2 inch in diameter.

slant fin sold the humidifier biz to another company.  info at the slant/fin site http://www.slantfin.com/contact.php

Mine dried out too. I could not find where to get the rubber valve seal for the tanks. Holmes does not list the part and when I called the rep told me they didid not stock the part. I solved my problem by purchasing thin rubber washers from Lowe's. They are 3/16 X 1 1/4 X 1/16 thick. The 3/16 hole in the center "snaps" on over the end of the plastic plunger just like the original. I had to trim the outside diameter with scissors to about 1" or using the old ones as a guide. Cost me $0.67

This is the link to your manual:
http://www.crane-usa.com/manuals/HumidifierManual2008.pdf

CAUTION:
Always be sure that the appliance is unplugged and switched OFF before cleaning or attempting to store the item. NEVER PLUG OR UNPLUG UNIT WITH WET HANDS.
DO NOT leave water in water tank or water basin when unit is not in use as it may result in the build up of mineral deposits and bacteria that can inhibit the output efficiency of the humidifier.
PLEASE NOTE that if water remains in the water tank for more than a day or two, bacterial growth is possible.
ALWAYS use fresh cool water when using unit.
NOTE: When removing water tank, water may accumulate under vapor lid and on the bottom of the water tank. It is recommended to have a dry cloth ready to dry wet surfaces.
DISINFECTING THE WATER TANK AND WATER BASIN
1. Fill water tank with 1 teaspoon of household bleach in 1 gallon of water. Let stand twenty minutes, shaking vigorously with two hands every few minutes, drain and rinse with clean water until the bleach smell is gone. Dry with a clean cloth or paper towel.

2. Wipe the water basin with a soft cloth dampened in the bleach and water solution. Rinse the water basin with cool water to remove any bleach smell. DO NOT IMMERSE WATER BASIN IN WATER.

3. Wipe all exteriors surfaces of the base with a soft, dry cloth. Do not immerse the base in water or use water to clean the base. An electric shock may result or the humidifier may be damaged.
NOTE: It is recommended to clean humidifier with water and bleach solution as stated above after using the humidifier the fourth time.

GENERAL MAINTENANCE AND CLEANING
Before any cleaning operation, switch the humidifier off and unplug it.
1. Always unplug the unit before cleaning.

2. The humidifier must be drained and cleaned before storing.

3. Once unplugged the exterior of the unit may be cleaned by wiping with a soft dry cloth. Caution: The ON/OFF switch must be thoroughly dry before unit is again plugged into power source.

4. There may be some lime deposits in the nebulizer, particular in areas with hard water. Overcome this drawback by cleaning the nebulizer with water and vinegar on a soft cloth regularly, as follows:

A. Dampen a cloth with vinegar and wipe the nebulizer gently, until the lime deposits disappear completely.

B. Rub down gently with a dry cloth and remove remains of humidity.

C. Do not rub the nebulizer with solid objects.

D. Do not clean with chemical products

5. When cleaning the water basin do not place the nebulizer directly under the water tap.

6. Never immerse the unit in water or let water enter the fan vent (see figure 3) or any other openings.

7. It is normal for water to be in the water basin. However water must not get inside the central body. If this should happen, take the humidifier to an authorized service center before using it again.

8. Clean the inside of the water tank at least once a week, as follows:

A. Fill the tank with clean water adding a few drops of bleach. Close the tank completely with its cap and shake by holding the tank with both hands. Do not hold by handle while shaking the tank.

B. Rinse thoroughly.
Water Level Sensor- The water level sensor is made of three key parts. When cleaning DO NOT MISPLACE these parts and MAKE SURE that you assemble these three parts correctly after cleaning and before operating humidifier. They are as follows:
Plastic Cap – this part has 4 flat tabs coming out from the bottom and is placed on top of a plastic pin.
Water Float - a small round part resembling a "life saver" candy located underneath the plastic cap.
Pin – plastic pin that secures water float and plastic cap.
To clean the water float unscrew the plastic cap from the pin. Remove the water float and clean by wiping the parts with a soft damp cloth. Replace the parts by first putting the water float onto the pin and re-screwing the plastic cap onto pin.



Good Luck.

On the Vicks v-3100 the water tank should lift off of the unit. Flip it over and there is a lid. Open the lid and fill the tank. Once you've filled it back up, put the lid back on. Flip the tank over to make sure there are no leaks, then put it back on the humidifier.

Note: It's very important to check to make sure the tank isn't leaking before you put it back on the humidifier, if it is, it will flood the reservoir, in turn causing water to leak out of the bottom of the humidifier (which is one of the major complaints about the 3100).