Clear PVC hose · 2-1/2 in
Qucship PVC hose, 2-1/2 in × 20 ft
The only hose on this shelf that says how its static is dissipated — and what has to be done for it to work.
Every figure below names its source. Each one is a manufacturer
specification read off the listing itself. The judgments are ours.
Grounded at both ends
The only earthing instruction on either half of this shelf, and the shelf’s own
intro names static earthing as one of the things it compares.
The coil is carbon steel and will carry a charge. What it will not do is earth
itself, which is why the listing says both ends.
What the listing does not say is how: a screw or clamp through to the coil, and
a wire to the machine frame or an earth point.
So it is an instruction without a method, and the method is the buyer’s.
Whether it matters
At this scale, it is unpleasant rather than dangerous.
Fine dust moving down a plastic hose builds a charge, and the charge jumps to
whatever is earthed — usually a hand on a machine. A dust explosion needs a
concentration and a confinement a home workshop does not have.
What makes earthing worth doing is that the shocks are unpleasant enough to make
people stop using the extraction. Extraction that is switched off collects
nothing.
Three to one
Twenty feet storing in about seven, which is the difference between a hose on a
hook and a hose in a corner.
It also means deep corrugation, and deep corrugation is drag. The published Miko
hose page on this shelf puts it plainly: corrugated hose has far more internal
drag than smooth duct.
Two listings on this shelf publish a compression ratio. Both publish 3:1.
Four clamps, with turn keys
In the box, in stainless.
Across both halves of this shelf, two listings supply clamps: the published
100 mm (3.94 in) Y-piece with three, and this with four. Everything else says sold
separately or says nothing.
A hose without a clamp is a hose that falls off, and a 2-1/2 inch joint that
falls off behind a machine is found by the noise.
And two and a half inches is not a machine size
The listing names table saws, planers, jointers, sanders and router tables.
The last two are right. The first three want four inches, and 64 mm (2.52 in) in front of
a planer starves it — the extraction pages in this catalog set out that
arithmetic at length.
What is missing from this page is the internal diameter and the wall thickness,
which are the two figures the airflow actually depends on.
Availability
Read on the day this page was built: $29 at the American Amazon shop.
Read from Keepa on the day this page was last revised; stock and price both move without notice.
Prices quoted in this text were read on 2026-10-07. The live price is at the top of the page.
