Repair when Not in Use

Sometimes you can hear a toilet refilling without being flushed. This sound can happen intermittently and occur every few minutes or every few hours. Such a refill sound is usually alerting you that your toilet is losing water, either internally or externally.

Read below if:

1. Your toilet has internal leaks

2. Your toilet has external leaks

1. Here are some solutions for internal leaks (water draining into bowl):

1. Check refill tube first: If refill tube is inserted too far into the overflow pipe, pull it out and reattach to outside of overflow pipe. This should keep the tube from entering the overflow pipe and often stop an internal leak from the tank to bowl and prevent “ghost flushing”.
2. Inspect flapper for visible damage/debris: Wipe flapper and surface area of flush valve clean. Replace flapper if this does not resolve toilet running. If you are unsure which size of flapper you need, please click here: Determine size of toilet flapper
3. To replace a 2″ toilet flapper, we recommend the 502 flapper; to replace a 3″ toilet flapper, we recommend the 5403 flapper. Alternatively, you can use the Super Flapper that replaces both 2″ and 3″ toilet flappers.
4. Replace entire flush valve if steps a and b do not resolve issue. We recommend the K-507A-008 for a 2″ toilet and the 540AKR for a 3″ toilet.

To replace any of the toilet parts, why not get Fluidmaster’s Everything Kit includes everything you need to fix your toilet in one purchase?

In the U.S. you can purchase either the 2″ or 3″ Everything Kit directly from Fluidmaster: Everything Kit

If you are in Canada and have a 2″ flush valve toilet, we recommend the 2″ Everything Kit or if you have a 3″ flush valve toilet, we recommend both the 540AKR Flush Valve and the 400H Fill Valve

2. Here are some solutions for water visible outside toilet:

Water visible at the rear of the toilet is most likely coming from the bottom of the fill valve, the water supply line or the seals between the tank and the bowl (in 2-piece toilets).

1. Water dripping from the bottom of the tank: Observe and ensure the fill valve locknut, located under the tank, is tight against the ceramic tank. If necessary, remove the fill valve and clean the bottom of the tank (both inside and outside) and ensure the shank washer is placed on the fill valve first before inserting the valve through the hole in the ceramic (it is designed to seal the tank from the inside the tank). Reinstall the existing valve or replace it with a new one. Hand-tighten the fill valve lock nut.
2. Observe the water supply line for visible leaks. It is always a good idea to replace the water supply line if it’s older than 5 years.
3. Leaks coming from under the tank onto the toilet bowl or down the back of the toilet base indicate failed tank-to-bowl seals, either at the bolts or on the center drain. If this is the case, replace the tank-to-bowl gasket and toilet bolts with washers.

Here is a short video on how to fix ghost flushing:

To download our free guide to fix common toilet problems please click here: Fluidmaster Toilet Repair Guide