RKI Instruments RP-2009 - Manual (Page 7)

RP-2009 Pump for the GX-2009 4
gasket.
Rubber Sample Nipple
A cone shaped 4 inch long rubber sample nipple is included
with the RP-2009 and is normally installed on the inlet fitting by
pushing the larger end over it. The smaller end can be inserted
in a hole or some other access to an enclosed area to sample the
environment.
Optional Hose & Probe
When desired, the rubber sample nipple may be removed and a
sample hose and probe with GX-7 fittings (optional accessories)
may be connected to the inlet fitting. Sample hose lengths are
available from 10 feet to 30 feet (see Parts List at the end of the
manual).
CAUTION: Sample hose lengths of more than 30 feet are not
recommended for the RP-2009 because of flow rate
reduction.