8006 or 11006 for carpet prespray. Stock brass lance valve started leaking big time Thurs. Replaced with Hydroforce-type trigger. Nice to not need to hold brass valve with a rag when applying hot prespray.
I never understood guys who MIST the carpet with Pre-Spray, get it down, and get it down fast, time is money and chemistry is a labor saving device.
I'd have a minimum of a 9506 if I was using it with a TM HWE.
Like Chad said, take that restricting check valve out, it will perform better and cause lets stress on the pump. I put a #4 jet on it and it puts down pre-spray much better. I put on a fancy circle valve on the end so there are no drips. I hate drips.