How to change a shut-off valve upper part

Like all everyday objects, the days of a shut-off valve are numbered at some point. Often it is the seals that are the first to quit and require replacement. How to do it yourself, read in this article.

Change the upper part of the shut-off valve correctly

Changing the upper part of a shut-off valve always makes sense if the valve no longer closes properly. If it's already dripping, it's high time you did it. In most cases, the seal is then defective, perhaps partially already dissolved correctly.

  • Also Read - How To Repair A Water Stop Valve
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  • Also read - What to do if a shut-off valve no longer closes?

You can also just replace the seal. This saves you material, but possibly not a lot of money. Especially when the cock knob no longer looks very resilient, consider changing the entire upper part. Classic angle seat valves or ball valves are available in hardware stores or online at low prices. If you also do the work yourself, you can get it done very cheaply.

The best way to make the switch successful is as follows:

  • Determine the inch size of the thread
  • Get a suitable replacement upper part
  • Turn off the next external water supply
  • Disassembly and assembly
  • Function test

So that you can get the correct replacement upper part, you must first determine the thread size of the shut-off valve to be changed. It is measured in inches - common sizes for shut-off valves are ½ to 2 inches. To determine this, you usually have to dismantle the upper part and measure it directly. But don't forget to turn off the water supply at the next outside water supply.

At the latest when it really comes to changing, the water must be turned off. If the shut-off valve to be replaced is the main tap, you must inquire about it at the local waterworks. Before dismantling the old valve, also place a bucket under the work area. To loosen the old shut-off valve upper part, turn the nut at the bottom counterclockwise. Simply use a suitable open-end wrench or pipe wrench.

After the residual water has drained from the pipeline, it is worthwhile to clean the connection a little from lime and dirt. New shut-off valve upper parts are usually pre-lubricated with a grease chamber to prevent wear. If you only replace the seal, you should also grease it. Then you can screw on and tighten the new top part. If, after switching on the water supply, the water runs and the valve holds tight, the function test has been passed.