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Seal the rubber gasket between the tank and the bowl with a waterproof silicone caulking compound. Make sure you clean off all dirt, dust, and mildew from surfaces before applying the caulking. One way to prevent condensation is by using a bathroom dehumidifier. They're extremely cheap compared to a whole house dehumidifier and go a long way in getting rid of humid air in the bathroom. For a more permanent and sustainable fix, Henkenius suggests installing an anti-sweat valve in the water-supply line leading to the toilet. And what will that do? Per Henekenius:
Toilet Tank Sweating: Add Insulation To Prevent Consendation
Condensation is caused when the water and moisture that naturally exists in the air around us hits a colder surface it then condenses on that surface forming water droplets commonly known as condensation.Before any boxing in is done, make sure you lag the pipes and/or place insulation inside the boxing also to help keep as much warmth in as possible. You can find out more about pipe boxing in this project.
How To Stop A Toilet From Sweating | 8 Pro Ways
If you suspect that any of these is the cause of your wet toilet cistern, you should consult a plumber to have it repaired. Can sweating pipes cause mold? Although it may seem that it is still helping, don’t open the windows if you notice humidity outside. Insulate your toilet tank Doing this means the toilet tank will only hold water for 1 or 2 minutes which is not enough for condensation to occur. Although a small amount of water will still be left at the bottom of the tank, most water will be removed.
Avoiding Condensation on Cold Water Pipes
You could heat your tank from the outside instead of covering it with a liner. You can wrap your cistern with a cover for the tank or another piece of fabric. This is a great choice of material as it absorbs any condensation. It is important to wash the tank at least once per week as mildew can form. Install an Anti-Sweat Valve