Wye Hopper Hole Door 2
Description
CHANGE NOTE 04/11/20 - Improved 1/2 NPS fit on coupler, increased thickness of gasket so it can't "decouple" from cap when assembled. A fully printable hopper cap/valve that doesn't require any gaskets or o-rings. Insert the "Gasket" print into the "Cap" print then screw them onto the "Coupler" print. See where the hole in the "gasket" print ends up once fully tightened, then unscrew and clock the "Gasket" print over until it is no longer overlapping with the through-hole in the "coupler" print. Then use a single 4-40 x 3/8" length screw (or matching length of thread-rolling screw) as an overtravel stop. Parts must be printed on a smooth buildplate surface in order to seal when closed. So painters tape and buildtak will not work. Tapered 1/2 NPS pipe connection on the coupler print will probably require adhesive or cement to be secured to the hopper.
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