White PE Tubing 3/8" Per Metre | RO & Filtration

White polyethylene tubing 3/8", sold by the metre

Connection tubing in polyethylene, 3/8" (9.52 mm) outside diameter, in white. It pushes straight into standard 3/8" push-fit fittings (John Guest type and equivalents), with no glue and no special tooling.

Why 3/8" rather than 1/4"

3/8" offers a noticeably larger flow section. It is used on lines where pressure drop matters: RO system feed, pressure tank outlet, run to a dispensing tap, water cooler and coffee machine lines. On the tank outlet in particular, moving from 1/4" to 3/8" makes a clear difference to the flow felt at the tap.

The white colour

A neutral shade, discreet on a visible installation, and one that shows up internal fouling, useful for visual checks. Keep it to runs not exposed to light: for a lit or outdoor run, choose black tubing, which blocks light and prevents algae growth.

Sold by the metre

Sale by the metre suits repairs, short runs and site top-ups, without opening a full roll. For installations in series, the roll remains more economical per metre.

Installation

Cut the tubing square with a proper tube cutter for a clean section, then push it fully into the fitting up to the stop. Avoid tight bend radii close to fittings and keep the tubing away from heat sources.