Many Foam Cannons don't produce the thick foam that you want. Most foam cannons come equipped with a 1.25 orifice. In order maximize the performance of your foam cannon (especially when using a lower psi and gpm electric pressure washer) you need to restrict the amount of water being mixed with your car wash solution as it is being fed through the foam cannon. In order to do this, you need to replace the orifice your foam cannon came with to a smaller 1.1 orifice.