CPP® · UK MANUFACTURER

How to Identify Your IBC Outlet Connection

Choosing the correct IBC adaptor starts with identifying the connection on the outlet valve. IBC outlets can look very similar while using different thread diameters, pitches or coupling profiles. Use the guide below to narrow down the connection before ordering.

Important: “2 inch” on its own is not enough to identify an IBC outlet. Check the complete connection profile, thread diameter and pitch where applicable.

Compare your IBC outlet visually

Use the profile and approximate outside diameter together. The illustrations below show four common outlet styles, including the corrected 100 mm S100X8 example.

CPP guide comparing common IBC outlet connections including S60X6, 2 inch Camlock, S100X8 and fine 2 inch pipe thread profiles — Measure the outside of the connection, then compare the thread or coupling profile. Diameter alone is not enough to identify an outlet.

Start with the outlet profile

With the valve closed and safe to inspect, remove the protective cap and look at the connection where your adaptor or hose will attach.

S60X6

Common coarse IBC buttress thread. About 60 mm outside diameter with a 6 mm pitch.

Side view of an IBC valve with an exposed 2 inch NPS male threaded outlet

2″ NPS

Fine straight pipe thread. About 60.3 mm outside diameter and 11.5 threads per inch.

Side view of an IBC valve with an exposed 2 inch male Camlock outlet and locking groove

2″ Camlock

Male cam-and-groove profile with a locking groove for a female Camlock coupling.

S100X8

Large coarse IBC buttress thread. About 100 mm outside diameter with an 8 mm pitch.

How to measure a threaded outlet

Measure the outside diameter. Measure across the highest points of the external thread. Do not measure the opening through the middle.
Measure the thread pitch. Measure the distance from one thread peak to the next. For a coarse thread, measuring across several gaps and dividing by the number of gaps can improve accuracy.
Check the profile. A coarse buttress thread looks very different from a fine pipe thread, even when the overall diameter is similar.
Check markings. Valve mouldings or caps can sometimes carry a size or thread reference, but measurements should still be confirmed.

Tip: a vernier calliper is the best tool for measuring the outside diameter. A ruler can be used as a rough check, but small differences matter.

Quick comparison

Connection	Typical appearance	Useful measurement	CPP range
S60X6	Coarse buttress thread	Approx. 60 mm OD, 6 mm pitch	Shop S60X6 fittings
2″ NPS	Fine straight pipe thread	Approx. 60.3 mm OD, 11.5 TPI	Shop 2″ NPS fittings
2″ Camlock	Male cam-and-groove profile	Identify by coupling profile and locking groove	Shop 2″ Camlock fittings
S100X8	Large coarse buttress thread	Approx. 100 mm OD, 8 mm pitch	Shop S100X8 fittings

These are common IBC outlet connections, but they are not the only types in use. If your outlet does not match one of these, browse our other IBC fittings or contact CPP for help.

Choose what you need on the other end

Once you have identified the IBC outlet, the second part of the fitting is the connection to your hose, pipework or dispensing equipment. Common options include:

Hose tails to suit the hose internal diameter.
BSPP or NPT threaded adaptors.
Camlock connections for removable hose assemblies.
Taps, nozzles and off-loading fittings.
Reducers and converters between different connection systems.

When asking for help, describe both ends of the connection where possible — for example, S60X6 female to 1″ hose tail.

Check the seal and application

The correct thread is only one part of the selection. Check that the adaptor has the correct sealing face and seal arrangement for the valve, and that the fitting and seal materials are suitable for the liquid, temperature and operating pressure.

Do not force a fitting that does not engage correctly. A fitting that starts tightly, rocks on the thread or will not seat properly may be the wrong connection even if the nominal size appears correct.