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Festool RTS 400 / DTS 400 sander port: measured 27 mm (D27) hose port. What shop-vac hose fits it and the exact reducer to join it to a 1-1/4, 2-1/2 or 4 inch hose.

Updated 05 September 2026.

PORT / HOSE

Festool RTS 400 / DTS 400 sander port dust port size

The measured dimensions of the Festool RTS 400 / DTS 400 sander port and the hose sizes it mates with.

OD27 mm1-1/16 in, 27 mm

Rings drawn to scale from the measured diameters in the table below.

Measured port dimensions

Port typemale spigot (hose goes over it)
Outer diameter (OD)1-1/16 in, 27 mm
Manufacturer designation27 mm (D27) hose port
Mating diameter (mm)27

Shop notes

Found on: Festool RTS 400 orbital and DTS 400 delta sanders.

The compact RTS and DTS sanders share the 27 mm D27 connection, so a CT hose reaches them directly. The narrow tip suits the small dust volumes these finishing sanders produce.

Connect this port

Questions and answers

What is the port type of the Festool RTS 400 / DTS 400 sander port dust port size?

male spigot (hose goes over it)

What is the outer diameter (od) of the Festool RTS 400 / DTS 400 sander port dust port size?

1-1/16 in, 27 mm

What is the manufacturer designation of the Festool RTS 400 / DTS 400 sander port dust port size?

27 mm (D27) hose port

What is the mating diameter (mm) of the Festool RTS 400 / DTS 400 sander port dust port size?

27