by Michael Abrams

Created on: January 19, 2009   Last Updated: September 10, 2011

Toilet malfunctions are one of the most dreaded household problems. Usually its minor, a fill valve(ball cock,) flapper or shut off valve.  I have always taken this approach to toilet repairs: if it's in the tank, replace the fill valve and flapper (especially if you have a float ball in the tank.) I use the Fluidmaster brand as they have been the most reliable for me and can be found in most places.This project takes about 45 minutes.

Before starting, gather the following items:

• New water supply (measure the distance between the tank and the shutoff valve)

• Shutoff valve, and

• An inside-the-tank repair kit

Basic information: All toilet inlets are the same size; the threads on the water supply for toilets are same on all fill valves, the usual threading for the connection to the shutoff is 3/8" (sometimes larger but unusual). Turn off your water supply (near the toilet on the wall of coming up from the floor).  Drain all of the water from the tank by flushing.  Have a shallow container and old bath towel available, disconnect the toilet from the water supply.  There is a minor amount of assembly on the fill valve. The carton has illustrated instructions inside and on the package (and are easy to follow).

The hardest part of this is the toilet water supply shutoff.  There are two types used; one is copper (sweat on or compression fit) or galvanized threaded, both styles are usually 1/2 inch.  If you looked carefully at the water shutoff in the bathroom, you should have the proper type and size (you can purchase several types if you are not sure-they are returnable if they are not used).  Turn on 1 or more faucets, find your main water shutoff and shut it off. Remove the existing shutoff and install the new one.

Next, remove the old fill valve and flapper, discard and install the new parts. Tighten all threaded parts hand tight and then 1 or more turns to secure.Insure that the new shutoff is off, turn the main water back on. You may have some air proceeding the resumed water flow (that is why you left the faucets on).Turn on the water supply to the toilet and check operation and check shutoff and other connections for leaks. If any leaks are observed or felt, tighten as needed. A note on shut-offs, if you are unsure about the size and style then you should shutoff your main water supply, remove the existing toilet shutoff's and take it to the store with you.

If you succeed in this project, you can tackle most minor plumbing problems.

Learn more about this author, Michael Abrams.
Click here to send this author comments or questions.