How to Troubleshoot a Frost-Free Yard Hydrant

A properly functioning frost-free hydrant will not leak.

Frost-free yard hydrants are designed to operate year-round. After the spigot or hydrant is turned off, the back-flow water will drain behind the handle, either directly out onto the ground or into a gravel bed below ground. This drains the supply pipe so that it cannot freeze and render the faucet inoperable. It also helps prevent broken pipes. Frost-free does not always equate to trouble-free. Occasionally, even frost-free hydrants can malfunction. They may fail to operate due to extreme temperatures or leak from either the spigot end or behind the handle. Basic plumbing tools and some investigation will solve most problems with a frost-free hydrant.

Things You'll Need

• Wrench or pliers
• Flat head screwdriver
• Hose washer
• Silicone spray lubricant (Optional)
• Plumber's grease or Teflon tape
• Electric heat tape, torch or hot water
• Funnel if using hot water

Instructions

Repairing Leaks

1. 

   A leaking faucet can become costly.

   Determine the location of the leak. Note if it is leaking from behind the hydrant handle or out the spigot end. A leak from the spigot end usually indicates a worn-out washer. A leak behind the handle may be an issue with the hydrant stem.

2. 

   Shut-off valves for outdoor spigots are often located near other utilities.

   Turn off the hydrant's water supply. The valve for the hydrant is typically located in the basement.

3. 

   Keep the hydrant handle open while making the repair.

   Open the hydrant's handle to release any residual water once the water supply is off. Remove the hydrant head with a wrench or pair of pliers.

4. 

   If the screw sticks, lubricate it with a silicone spray.

   Take out the hose washer by first removing the screw that holds it in place. Clean out any grime or debris where the washer sat then replace it with a new washer.

5. Apply plumber's grease or Teflon tape to the stem on the hydrant then re-install the hydrant head.

6. 

   Clean all components while they are disconnected.

   Turn on the water supply and test for leaks. Repeat the above steps if necessary

Thawing a Frozen Water Supply

1. 

   Heat tape is available at home improvement stores.

   Heat up the supply pipe to the hydrant. The safest way is to wrap the pipe in electric heat tape and check it periodically. Otherwise, you can use either hot water or a blow torch.

2. 

   Plan on using several gallons of boiling water to thaw the pipe.

   Remove the hydrant head and washer, after turning off the water supply, if you'll be using hot water to thaw the pipe. Place a funnel in the mouth of the pipe and pour hot water down it. Re-install the washer and hydrant head once the water flows freely again.

3. 

   Torches should not be used on plastic pipes.

   Hold a blow torch far enough away from the water pipe to heat it, if you go with this method, but avoid holding it close enough to damage the pipe or fittings. Start with a low flame held 4 to 6 inches away from the pipe. Increase the flame volume and proximity if needed. Make sure your work area is well-ventilated and do not use a torch in an area where gases may be ignited or near gas appliances.

4. Re-apply heat, as needed, until the water supply is restored.

Tips & Warnings

• Contact a licensed plumber if problems with your frost-free hydrant continue or if the troubleshooting tips prove fruitless.

• Always exercise caution when using blow torches or boiling water.

References

• Government of Alberta: Frost-free Yard Hydrants