6″ to Dual 4″ Y-Splitter

Description

6 inch to dual 4 inch Y-splitter for duct runs

A 6 inch to dual 4 inch Y-splitter turns two small lines into one, or one line into two. The job it does most often in a mining install is collection: the machine on one 4-inch branch, its power supply on the other, and a single 6-inch trunk carrying both out of the building. One hole in the wall instead of two, and the power supply stops quietly heating the room you just spent an afternoon ducting.

It is a wye, not a tee. The branches lean into the trunk at a shallow angle so the two streams join while already moving in roughly the same direction, rather than colliding at a right angle and having to sort themselves out afterwards.

Drawn in-house as one continuous body, 226 mm along the trunk axis, with the same collar standard as the rest of the line on all three ends.

What it fits

Standard 6-inch duct on the trunk collar, standard 4-inch duct on both branch collars, rigid or flexible on any of the three. The 4-inch branches match the small end of the 6″ to 4″ Duct Reducer, so a 6-inch auxiliary line can be brought down to branch size and fed straight in.

Know the limit: 4-inch branches are power-supply scale and auxiliary scale, not machine scale. Two full ASICs on this part is the wrong build, and the right one is the 8″ to Dual 6″ Y-Splitter.

How it is used

As a collector, which is the common case: 4-inch duct from the power supply onto one branch, 4-inch from a small auxiliary source onto the other, 6-inch trunk off the third collar and out. As a splitter, run it the other way to send one exhaust to two destinations — a room that wants the heat in winter and an outside vent that takes it the rest of the year. Band-clamp all three collars and support the trunk near the fitting, because a loaded wye is a three-way lever.

Why the shape of the merge matters

When two air streams meet head-on in a tee, they trade momentum with each other before either of them gets down the trunk. That shows up as pressure loss on both branches and as noise at the junction. A wye brings them together along nearly the same heading, so the merge costs far less and each branch stops fighting the other. If you are going to combine two air paths at all, the shape you do it with is the whole difference between a junction that works and one you can hear from the next room.

• Merges two 4-inch branches into a 6-inch trunk at a shallow angle rather than a right angle
• Lets a machine and its power supply share one wall penetration
• Runs backwards as a splitter to send one exhaust to two destinations
• Matches the 4-inch collar on the 6-to-4 reducer for auxiliary lines
• Comes out as one printed body, with no seam at the junction where the streams meet

Specifications

Open source — the wye geometry is published free

A shaped wye is one of the harder things in this line to draw and one of the easiest to get wrong. D-Central Technologies drew this one, then gave it away rather than hoarding it: released open source under CC BY-SA 4.0 at the 3D models download center, free to download, modify, remix, print and sell. Its card is the 6″ to dual 4″ wye model, alongside the rest of our own designs.

Pull the file directly from y_split_6_to_2x4.zip: STL, CC BY-SA 4.0 licence, installation and safety guide. This listing is the finished wye instead — made to order in PETG, black or orange, and shipped from Montreal, Quebec, all three collars cut to the same standard as your other fittings. The file stays free; the part you buy, or D-Central’s fund page, is what pays for the next wye we draw.

Works with

• 8″ to Dual 6″ Y-Splitter
• 6″ to 4″ Duct Reducer
• 6″ Duct Coupler
• Antminer S19 Full-Wrap Dual 120 mm to 6″ Shroud
• 6″ Window Exhaust Port

Every fitting in the run drawn to mate the next one: see the D-Central shroud and ducting system.

Frequently asked questions