28mm caravan RV sink water drain pipe connector fittings

prusaprinters

<p>UPDATED 11th March 2020: Added straight-through Y pattern, optional flow arrows.</p> <p>Having a european-built caravan in Australia, I found it very difficult to get the 28mm diameter sink and drain pipe plumbing these are fitted with. I tried a few of the local big name australian caravan parts suppliers (who purport to have the "full spectrum" of pipe fittings) and they didn't know what I was talking about.</p> <p>I found some being sold on UK eBay but at a cost of more than 48 AUD (approx 32 USD / 28 EUR / 24 GBP) for just one single connector posted to Australia was outrageous.</p> <p>So, in frustration I decided to do my own workalike connectors. Presented here is a set of 28mm dia fittings for straight-through, tee, Y, straight-through Y, elbow, end cap, U-bend, X, multi-pipe and reducer patterns so you can make your own. Or, you can set it to fit any pipe diameter you like. For acute Y angles the connector length may need to be increased to reduce pipe end impingement. The end cap has a string tie loop added by default but you can turn this off.</p> <p>The photos show the straight-through, 90 elbow, tee and end cap prints, and how I used them when I needed to re-route the sink drain piping.</p> <p>Customiser variables</p> <p>The OpenSCAD script is customisable so feel free to make these for practically any size pipe you like.</p> <p>Also if you need an elbow angle other than 90, 45, 30 20 degrees just modify the script.</p> <p>The rendered screenshots show the customiser settings used to produce them. The PIPE_ANGULAR_SEPARATION is only used for the Yand straight-Y fittings and is ignored for the rest.</p> <p>CONNECTOR_TYPE</p> <p>straight, tee, X, Y, straight-Y, multi, 90 elbow, 45 elbow, 30 elbow, 20 elbow, 120 elbow, U bend, cap, reducer</p> <p>PIPE_ANGULAR_SEPARATION</p> <p>60, 75, 90, 100, 110, 120, 125, 130, 135, 140, 150 degrees</p> <p>TO_SUIT_PIPE_DIAMETER</p> <p>Set to your plastic pipe's outside diameter (these connectors go over outside of pipe)</p> <p>STRAIGHT_CONNECTOR_LENGTH</p> <p>Overall length of the connector (eg. end-end for straight)</p> <p>PIPE_OUTERMOST_DEPTH</p> <p>The first-from-end inside length (at pipe diameter)</p> <p>PIPE_NOMINAL_WALL_THICKNESS</p> <p>Change to suit how thick (and thus strong) the conenctor wall is to be. Nominally 2mm thick.</p> <p>PIPE_INTERMEDIATE_STEP_REDUCTION</p> <p>The tiny diameter difference inside the pipe, to grip it more firmly (optional, set to 0 if not wanted)</p> <p>PIPE_INTERMEDIATE_DEPTH</p> <p>The length of the innermost step diameter.</p> <p>EMBOSS_SIZE_LABEL</p> <p>Print the fitted pipe diameter on the outer ends of the connectors if desired eg. "28mm Ø"</p> <p>EMBOSS_ANGLE_LABEL</p> <p>Print the angular separation (note - only use for Y fittings so far)</p> <p>EMBOSS_FLOW_DIRECTION_UP</p> <p>Print a large upwards arrow on the outside in the middle of the connector length for most patterns</p> <p>EMBOSS_FLOW_DIRECTION_DOWN</p> <p>Print a large downwards arrow on the outside in the middle of the connector length for most patterns</p> <p>TEXT_SIZE</p> <p>Embossed text size. Nominally 5mm high. Highlight with black Sharpie marker on print.</p> <p>CAP_TIE_LOOP</p> <p>Add a small loop to the end cap for tying or looping a retainer string onto.</p> <p>TO_SUIT_REDUCER_PIPE_DIAMETER</p> <p>The secondary pipe diameter for a reducer fitting.</p> <p>CROSS_SECTIONAL_DEMO</p> <p>Only check this to view the internals of the fitting. Don't use it for rendering or model generation. (see Reducer picture)</p> <p>PRINTING NOTE</p> <p>Print at 100% infill. Try and print standing vertically, if possible so that scaffolding may be ommitted on the inside.</p> <p>These are for sink and drain plumbing only, as the filament I used (PETG) is not rated as food grade. If I had my druthers I would use Nylon, PETG, ABS in that order.</p> <p>I do not recommend using PLA as that may not remain waterproof.</p> <p>These connectors and the OpenSCAD script to generate them are placed in the Public Domain. As a courtesy, please leave my name as the author of the program. I do not warrant them fit-for-purpose for anything, so use entirely at yor own risk.</p> <h3>Print Settings</h3> <p><strong>Printer:</strong></p> <p>Coocoon Create (ALDI rebadged Wanhao)</p> <p class="detail-setting rafts"><strong>Rafts: </strong> <div><p>Yes</p></div> <p><strong>Supports:</strong></p> <p>Yes</p> <p class="detail-setting infill"><strong>Infill: </strong> <div><p>100%</p></div> <p><strong>Filament:</strong> Doesn't matter PETG Lime green (looks nice)</p> <p><br/> <p class="detail-setting notes"><strong>Notes: </strong></p> </p><div><p>If you can print vertically successfully without scaffolding, do so.</p></div> </p></p> Category: Automotive