I have an outside spigot in my garage that leaks when turned off. I had a hose connected on a hose cart and the hose would fill with water (when off) and eventually broke the hose cart apart (from the built up pressure I'm assuming). If I put on a hose cap or a hose with a nozzle on the end, could backed up water cause pressure and a burst somewhere? Or would this be sufficient in holding the leak?