Sch80 bulkheads do wonders, it's amazing so many people don't use them. Corse threads and thicker gaskets means a much tighter seal and they can take more pipe load. Try and find one that fits your hole better, there are many different brands that require different hole sizes. If you measure your hole myself or others can point you in the right direction. Thread depth shouldn't matter, the nut should butt up to the glass and you need a clearance hole large enough in you stand to clear the nut and allow access for tightening.
|