You will need to use a foaming agent such as the ProFoam Foaming Concentrate with the Chapin Poly Foamer Sprayer 48 oz to create a foam along with the product you intend to use in it.
No, according to Chapin there is no extensions or hoses that can attach to the tip/nozzle on the Chapin Poly Foamer 48 oz. (1054).
The hand pump professional line of Chapin Poly Foamers have extensions for treating tight areas. There is also a Chapin Foamer Model 2658E Nozzle Kit 3-4852 that has 3 extensions and 3 types of nozzles.
The psi of the Chapin Poly Foamer Sprayer 48 oz. is between 40-60 psi.
No, car soap or dish soap should not be used in the Chapin Poly Foamer 48 oz. (1054). You will need to use a foaming agent such as the ProFoam Foaming Concentrate with the foamer along with the product you intend to use in it to create a foam.