1693TA
Senior Member
I purchased five in total of the Landa machines for the shops. Good support in those days and was friends with a guy when starting an industrial supplies distributorship. I found 4gpm, and 2000psi is a very good balance that doesn't wear the operator out and offers a good service life. 3000psi and above in an auto body shop type atmosphere was too easy to cut into plastic parts and took a lot out of the guy pushing the pressure gun. Even still 2000psi is too much in the retail car wash operations.....
If you have a PWHS series of machine the pressure reducing valve is just inside and opposite the burner motor. Never have had any problems with mine with either clogging, or burner. I always allow coil cooldown after use by running cold water through for a couple of minutes and run caustic soda through the coil every fall circulated through my aqueous parts washer cabinet. Degreasing larger equipment and such outside I tend to use the chemical injector and the caustic allowing it to dwell then rinsing hot as it speeds drying and lessens flash rusting.
Diesel fuel put through a bug sprayer put directly where you want to clean works pretty well also. So does oven cleaner which is basically caustic soda with a thickener.
If you have a PWHS series of machine the pressure reducing valve is just inside and opposite the burner motor. Never have had any problems with mine with either clogging, or burner. I always allow coil cooldown after use by running cold water through for a couple of minutes and run caustic soda through the coil every fall circulated through my aqueous parts washer cabinet. Degreasing larger equipment and such outside I tend to use the chemical injector and the caustic allowing it to dwell then rinsing hot as it speeds drying and lessens flash rusting.
Diesel fuel put through a bug sprayer put directly where you want to clean works pretty well also. So does oven cleaner which is basically caustic soda with a thickener.