Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great when combined with a shutoff valve

These brass connectors are high quality and don't leak at all. I paired them with a separate brass shutoff valve, and the combination allows me to switch attachments without shutting the water. I originally tried a connector with auto-shutoff, but the o-ring popped out after a few uses and it leaked. These connector are much more durable and do not inhibit water pressue.