Well-made brass hose nozzles will last for years, but even the best of them can spring a leak now and then. Nearly always, leaks are due to a defective washer.
Rubber washers, either hose-replacement or regular plumbing type
Awl, ice pick or screwdriver
Step1
Disassemble the nozzle and pull out the nozzle insert. At the outer end you will see one or more rubber O-ring washers.
Step2
Remove the washer, using an awl, ice pick or screwdriver.
Step3
Slide a new washer onto the shaft.
Step4
If the leak is occurring at the hose connection, pull out the washer at the base of the nozzle and replace it.
Step5
A plastic nozzle may be damaged beyond repair. If that's the case--or if the leak is at the base of the nozzle but in the hose itself--buy and insert new end fittings following the steps in How to Mend a Leaky Hose.
Tips & Warnings
At the end of each watering season, pull out the hose-nozzle insert and coat it with petroleum jelly to prevent corrosion.