B& G Sub Slab Injector SSI # 14 ( long version) The B& G Sub Slab injector ( SSI) features the unique locking mechanism to reduce splash back. SSI comes in the longer # 14 ( 28" long) or the shorter # 4 ( 18" long) , which is great for working in tight spaces such as under sinks. Both tools feature tip shut off to eliminate drips and come with the following tips: 360 degrees at 2 gallons per minute 180 degrees at 3 gallons per minute