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How to repair the Toilet tank sweating

2014/05/24

Sweating toilet tanks are distinct from cracking or leaking toilets, as the moisture problem emerges from outside rather than inside the toilet unit. Excess moisture in the air, caused by shower steam or simply a humid climate, comes in contact with the ceramic surfaces of the toilet. Beads of condensation then form due to the difference between the temperature of the moisture in the air and the cold surfaces of the toilet bowl and tank.

Sweating toilet tanks are distinct from cracking or leaking toilets, as the moisture problem emerges from outside rather than inside the toilet unit. Excess moisture in the air, caused by shower steam or simply a humid climate, comes in contact with the ceramic surfaces of the toilet. Beads of condensation then form due to the difference between the temperature of the moisture in the air and the cold surfaces of the toilet bowl and tank.

Air dehumidifiers or conditioners are an effective means of removing excess moisture from the air before it can cause your toilet to sweat. However, these units can be expensive to run, especially during the summer when humidity is commonplace. Opening bathroom windows can also help steam from taps or showers escape, although this is unlikely to be effective if temperatures outside are high too.

Installing an anti-sweat can also help prevent a toilet from sweating. An anti-sweat valve is fitted to the water supply pipes running to the toilet from behind the wall or beneath the toilet. Installation involves cutting a water supply pipe and soldering it back together, so you may want to hire a plumber for the job. The valve works by mixing a small amount of hot water with the cold water in the toilet, thus raising the toilet’s overall temperature. Raising the water temperature by just a few degrees is enough to warm up the bowl and prevent moisture in the air from turning into condensation. Anti-sweat valves are usually available at hardware or home improvement stores.

You can adjust the temperature of sweat valves by using a slotted screwdriver to increase or ease water flow from the hot or cold water screws. Finding the optimum temperature to prevent condensation is a process of trial and error. Start with a minor flow from the hot water screw and check your toilet bowl after an hour. Increase the amount of hot water as required until condensation stops appearing.


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