Cross, Slip x Slip x Slip x Slip PVC Schedule 40 3" (420-030)

The 420-030 is a 3" PVC Schedule 40 cross fitting in a full slip (socket) configuration across all four ports. All connections accept 3" plain-end pipe for solvent welding, producing a permanent, fully fused four-way junction without the need for threaded transitions or stacked tee fittings. The cross geometry places two ports on a straight run and two ports at 90° to that run on the same plane — creating a single fitting that branches in all four cardinal directions simultaneously.

The cross fitting serves a specific and intentional role in piping system design that a tee cannot fulfill. Where a tee creates a three-way junction with one branch off a straight run, the cross creates a four-way junction at a single point — allowing flow to be distributed to or collected from four directions in one compact fitting body. Without a cross, achieving the same four-way junction would require two tees in close proximity, adding fitting bodies, additional solvent-weld joints, and a short pipe section between them to the assembly. The cross eliminates all of that, producing a cleaner, more compact installation at any point in the system where four-way flow distribution or collection is required.

At 3", the 420-030 is a large-diameter cross fitting most commonly found in main distribution headers, irrigation manifolds, and industrial process systems where high-volume flow needs to be split or collected across four directions simultaneously. The all-slip design creates permanent solvent-weld joints on all four ports, making this the standard choice for applications where joint permanence and pressure integrity at the four-way junction are the primary considerations.

It is worth noting that cross fittings in pressure piping require careful consideration during system design. When flow enters from one port and exits through three others simultaneously — or enters from two opposing ports and exits through the remaining two — the hydraulic forces at the junction create a more complex stress distribution than a standard tee. For this reason, crosses are most commonly used in lower-pressure distribution and irrigation applications rather than at high-pressure junction points, and the system designer should confirm that the four-way configuration is appropriate for the specific operating conditions.

Manufactured from virgin PVC compound to Schedule 40 dimensional standards, the 420-030 delivers solid pressure ratings for standard commercial and light industrial service at the 3" diameter. Like all Schedule 40 PVC fittings, it is lightweight, corrosion-proof, and fully resistant to biological fouling and a broad range of chemicals encountered in plumbing, irrigation, and process applications.

Specifications:

Industries & Applications:

• Irrigation Systems — Distributing flow from a 3" mainline in four directions simultaneously at a field distribution point, manifold junction, or zone header intersection in large commercial or agricultural irrigation infrastructure
• Municipal Water & Wastewater — Creating four-way junctions on 3" distribution mains or collection system headers where flow needs to be split or collected across two perpendicular pipe runs at a single point
• Industrial Process Piping — Branching a 3" process header in four directions at a distribution manifold or collection point where a compact single-fitting junction is preferred over two stacked tees
• Water Treatment — Installing four-way distribution or collection points in treatment plant piping where parallel process paths converge or diverge at a single junction in the header system
• Commercial Plumbing — Creating four-way junction points in 3" supply or drain piping in large commercial construction where the routing geometry requires simultaneous branching in four perpendicular directions
• Agriculture — Splitting a 3" PVC irrigation main in four directions at a field distribution node to feed multiple lateral lines or zone headers from a single central fitting