Low Rent Mortar Sprayer #2
My very simple and inexpensive home made mortar sprayer has served me well until lately, when it started clogging every few minutes. I thinned my mortar mix a little and hosed my sprayer out, but every few minutes I'd have to stop. My theory is that sand has scarred the soft PVC plastic or copper nozzle enough to catch a little mortar and make it accumulate there. Or maybe it was the latex cement I sprayed that makes the mortar stick. Regardless, I had to replace my sprayer, and wanted to do it in a way I could duplicate easily. As before, I started with a 1-1/4" male threaded cap and a 1-1/2 to 1-1/4 female threaded bushing, I also used a gnarled adapter for my air gun, and a small copper nozzle. The nozzle and spray hole in the cap need to line up, which can be a little tricky on a rounded piece. I drilled just above the ridge at the bottom of the cap, using the small bit (9/32) first, and drilled all the way through the fitting so I had a hole front and