How to Locate and Repair a Leaking Isolation Valve

What You'll Need
Working gloves
Water pump pliers
1 15-mm Isolation valve
2 brass olives
2 compression nuts
Hack saw

An isolation valve is installed in the plumbing in order to facilitate the maintenance of the plumbing system during cases of malfunction such as leakage. Isolation valves are also used in HVAC systems for the same purpose as with the plumbing system. However, there are some cases when an isolation valve stops working and eventually, the water or gas that goes through your plumbing or HVAC system starts to leak. Even if your valve has a very small leak, it can still cost you a lot of money over time. That is why it is important that you do something about it. While the installation and repair of the isolation valve requires professional skill, you can still do it on your own by following these steps.

Step 1 - Close The Valve First

The first thing that you need to do is to locate the isolation valve and close it. If you do not know where your isolation valve is, you need to look at the blueprint of your house for the plumbing and HVAC system. Once you locate it, turn it off in a manner similar to when you are using a crude garden faucet. Turn on one of the faucets first to drain the water that has remained in your plumbing system. This makes it very easy for you to work with the isolation valve.

Step 2 - Remove The Old Isolation Valve

Using a water pump pliers, remove the 15mm isolation valve and check if the pipe where the isolation valve is inserted is still in good condition. If not, remove the entire pipe and replace it with a new one. In most cases, when an isolation valve leaks, the pipe where it is fitted through is also usually battered thus replacing the whole pipe is the best thing to do in order to prevent further leaks in the future.

Step 3 - Cut Through The Pipe Where The Isolation Valve Will Be Fitted

Using a hack saw, cut through the portion of the new pipe where the isolation valve will be fitted through. Clean the area, where you have just cut through, of debris before you proceed to the next step.

Step 4 - Install The Compression Nuts

Once the area is already cut and clean, install the compression nuts by fitting it around each pipe. Also, install the one brass olive for each compression nut. Before you slide in the isolation valve, make sure the arrow of the valve is pointing in the right direction and push the end of the pipe so that it can easily be tightened later. This will make your isolation valve fit properly through the pipes.

Step 5 - Tighten The Compression Nut Around The Isolation Valve

Using a pair of water pump pliers, tighten the compression nut to hold the isolation valve firmly in place. Double check for the fitting and see if the tightness is just right before you turn on the valve to let the water or gas into your plumbing or HVAC system.