Using my Q4 outside in the hot summer sun spraying in the shade with the stock black hose(black Q4) with a 6' whip then a 10' whip. The connection between the whips blew off, it's only a barb fitting, connected again but it blew off in a few minutes, I swapped the two and it held. I needed the whip as I was working off a ladder and need that much of lighter length. I added hose clamps on both whips later. My whole setup is different now as mentioned above.