strainer

Assembling my system after a long delay in getting the Vortech tanks. One little mystery, though. There's this one item, which looks like a strainer, yet isn't. What is it, please? And where ought it go? I suspect is to do with the KIO system. Yet there is no place obvious where it might seem to...

I'm trying to install the drainage on this unusual (for me, at least) kitchen double sink. The pictures tell the tale: rather than being held to the sink by a metal bell and nut, the SS strainer has a plastic bell clipped around the strainer center posthole. The male threads I'm used to seeing...

Hello. I'm at a loss right now. I have a 1-1/2" brass tailpiece with a wye and am trying to hook it up to the strainer. However, the 1-1/2" rubber washer made for the brass sits half inside the bottom of Strainer and half around the tailpiece and it leaks once I tighten. Do they make like 1-5/8"...