I'll be using a Studor recessed box to mount an AAV to ABS pipe inside a wall. The directions say the box can be connected to either PVC or ABS using the "appropriate" solvent. Since the box is white plastic, I I am doubting that I can use ABS solvent. I called IPC who makes the valve box and the plumbing rep didn't know. He referred me to their solvent tech who needed to know what the box was made of. None of the spec sheets specify this. Does anyone on the forum know definitively what solvent I should use?