PVC Bulkhead Fitting
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If you look for a PVC bulkhead fitting, they can be kinda expensive, but there is a cheaper
way to make one pretty easily. Just go to your local hardware store and pick up some electrical
pvc parts, and a plumbing gasket.
I mostly use 1" pvc for drains on tubs, as well as overflow tubes. You have to get A) one long piece of 1" pvc (the height of the water you want to remain in the tub), B) a 90 degree fitting, C) a short piece of 1" pipe, D) a male threaded pvc electrical connector (grey) and E) a female pvc electrical connector.
The grey pieces will be next to the grey plastic electrical junction boxes (will be the same color) in the electrical section. These are different than the pvc threaded pieces (white ones by the other pvc stuff). The white ones are tapered, so they don't tighten flush, and a bulkhead fitting has to. The grey ones are meant to be blukhead fittings for electrical connections, they are not really water proof for pressure, but the seal will take care of that. The seal I found is for a Lavatory Pop- up drain. This one seal, I cut and use for 2 gaskets.
It is important to assemble as shown with the male part on the outside going in. If the male was on the inside going out, the threads could leak (even with the seal). You could probabaly get away with it, but this way is a little better. For most things I don't put anything on the inside connector, but in some tubs there are small animals I don't want sucked into the drain. In this tub the side is anged a bit, so I heated and bent a piece of 1" pvc, and cut a slit in the bottom of it, to keep it from sucking up small things.
You could also attach the pvc prefilter to it if you had even smaller things in there. )
click to enlarge For making the holes that the fittings will go through, I used a 1 1/4" for the 1" fitting and 7/8" for the 3/4" fitting (it is a little tight for the 3/4") )
click to enlarge I don't glue any of the pvc pieces, just pushing them together is enough, but make sure that you don't let them get to loose. The inside of the fitting on a filter. )
click to enlarge the outside of the fitting, but in this case I am going through a fence which supports the pipe (which will be full of water). If I was not supporting it, the pipe should not stick out that much. Now I can just turn this pipe to drain the filter.
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