A sweating toilet is more than a nuisance. Water from the toilet drips onto the floor and can ruin a bathroom floor in short order. Why does your toilet sweat in the first place, and what can you do to stop it?
The water that collects on your toilet tank is condensation – moisture that’s been pulled out of air in your bathroom. As it turns out, your toilet is a natural dehumidifier. The moisture forms on the surface of the tank because the tank water is colder than the surrounding air temperature. The difference in temperature causes the air to release water and voilà, one sweaty, drippy toilet!
Changing the environment in your bathroom to discourage this process can reduce or eliminate a sweaty toilet. It can also help preserve the condition of your bathroom floor. So what exactly can you do?
How to stop your toilet from sweating
Get rid of the water in your bathroom. First, you can take steps to ensure that the air in your bathroom doesn’t have a whole lot of water in it.
- Install (or use) an exhaust fan when you take a shower.
- Take shorter, cooler showers to discourage the migration of water into the air.
- Dry the shower walls after you’ve taken a shower.
- Open the door to the bathroom when you finish your shower.
- Use a portable dehumidifier to dry out the bathroom after a shower.
- Consider installing a whole-house dehumidifier to keep your entire house comfortable.
- Don’t open the bathroom window if it’s humid outside. Letting humid air in just makes matters worse.
- An air conditioner is a great dehumidifier. If you have air conditioning, use it.
Warm up your toilet. Not kidding here! Insulating your toilet tank can prevent water from condensing on the surface. You can line the tank with an insulating kit, or you can cover the entire outside of the tank with a tank cover. If you can prevent the cooler tank from meeting up with the warmer air, condensation won’t occur. If you’re willing to spend a little extra, you can also purchase a new, insulated tank for your toilet.
Warm up the water in the tank. Also not kidding. You can install an anti-sweat valve that mixes a little warm water in with the cold when the tank refills. As long as the water temperature gets close to the air temperature in the room, no sweat!
Reduce the amount of water in the tank. The less water you have in the tank, the less the tank will sweat. Installing a low-flow toilet not only saves water, but also reduces the amount of condensation a tank can generate. If you can combine a low-flow toilet with an insulated tank, your bathroom floor will stay drier.
Get rid of the tank. Some manufacturers make tankless residential toilets. They’re not cheap, and they typically use an electric pump to move water in and out of the toilet. (Pro tip: during a power outage, a tankless electric toilet won’t work.) If you can’t get rid of the tank, consider using a low-profile toilet. The closer your toilet tank is to the floor, the cooler the surrounding air is. (Remember, heat rises.) Keeping your toilet tank on the down-low can help reduce big differences between the bathroom’s air temperature and the toilet tank’s water temperature.
Check the flapper valve. If your flapper valve at the bottom of the tank is leaking, the toilet will regularly take on a lot of fresh, cold water to replace the water that leaked out. If you stop the leak, the water in the tank can reach room temperature.
Use a drip tray. This is the one tip that will do absolutely nothing to prevent your toilet tank from sweating. You can put a drip tray down on the bathroom floor behind the toilet. Your toilet will still sweat like crazy, but the condensation won’t ruin the floor. You’ll have to empty the tray regularly, but we think that beats replacing the floor.
If you would like more information about installing a low-flow toilet, a tankless toilet or an insulated toilet tank, Boston Standard Company can help. We can also help with leaking toilets, and whole house cooling and dehumidifying solutions. (We don’t empty drip trays, though.) Give us a call at (617) 288-2911 to schedule a consultation.
Photo Credit: Edward Dick, via Flickr
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