Guest 1/2 Bulkhd Union

The John Guest 1/2" Bulkhead Union from Reliance Worldwide Corporation is designed to pass a water line cleanly through a panel, tank wall, or equipment enclosure while sealing tightly around the opening. With push-fit 1/2" tube ports on both sides, it makes through-wall connections fast and leak-free, eliminating the messy improvisations that drilled pass-throughs often invite.

Bulkhead fittings are essential whenever tubing must penetrate a barrier, such as the wall of a storage tank, a cabinet panel, or a filtration housing enclosure. The fitting mounts in a drilled hole and secures with a retaining nut, providing a stable, sealed pass-through for the line. This keeps the penetration neat and prevents leaks at the very point where they are hardest to fix later.

Where It Excels

• Connection: Tube x Tube, both ends 1/2"
• Bulkhead union for panel and tank-wall pass-throughs
• Corrosion-resistant polypropylene construction
• Push-in collets on both sides for tool-free tube connection
• Demountable for servicing without removing the bulkhead
• Provides a stable, sealed anchor point for the line

To install, drill the appropriate hole in the panel, mount the bulkhead body, and tighten the retaining nut to secure and seal it against the surface. Then cut your 1/2" tubing square and free of burrs and push it into the collet on each side until it bottoms out. The internal O-rings seal each tube connection while the bulkhead itself seals against the panel, so both the wall penetration and the tube joints stay watertight. The corrosion-resistant polypropylene construction holds up to continuous contact with treated water without scaling or rusting. Because the tube connections are demountable, you can service the line on either side without disturbing the mounted bulkhead. For organized, reliable through-wall plumbing in water treatment and storage applications, this John Guest bulkhead union is a robust, professional choice.

Within the John Guest range, this bulkhead union works alongside the unions, elbows, tees, and valves that share the same collet system, so tubing on either side of a panel can connect to the rest of a layout using familiar push-fit parts. For tank and enclosure builds, having a dedicated, properly sealed pass-through is far more reliable than improvised grommets, and it gives the finished installation a clean, professional appearance.