@scottw and whoever makes the one with the coin shaped dial. I'm tired of having to fix the o-rings on the dial, and the HF is always getting out of wack with the spring getting wore out inside. These $200+ sprayers are junk! Even the cheapo ones that are preset at 9:1 are always going bad also. And who put the RED thread lock on the QC on the one with the dial? freaking idiots! Just use thread tape so we can take these things off when needed. I have about ten of these in my shed that I'm using for parts when the new ones break down. Yes, I'm rinsing them out and I'm not using them when my water is scalding hot. Try another excuse