Assembly and Operation
© 2012 Little River Research & Design; updated July 2018
9
STEP 2 - Install the standpipe in the drain assembly
Install the standpipe by sliding it into the drain assembly from the
underside of the box
. Insert
the handle first. The seal may be damaged if you insert the standpipe from above. For initial
setup, the standpipe should extend into the box approximately 2 in (50 mm).
The standpipe will move much more freely in the drain assembly seal when wet — you may
want to moisten the standpipe before inserting it.
The standpipe has been lubricated with a silicone grease to allow smooth action against the
rubber seal. This lubricant is waterproof, nontoxic, and should last for many uses. As needed,
apply a small amount to restore smooth movement. This silicone grease may be found at most
hardware stores and is typically used for waterproofing electronics and o-rings. An extra tube of
silicone grease has been provided with your model and can be found inside the red carrying
case.
Keep the standpipe coated with a thin film of silicone grease
to ensure years of trouble-
free operation.
The drain assembly nut should not be over tightened.
Some water should leak from around
the drain assembly, down the outside of the standpipe, and into the reservoir. This flow allows
“groundwater” to exit the media and improves river modeling performance.
Figure 5. Insert the standpipe from
the underside of the box to avoid
damage to the seal. The standpipe
will move much easier when the seal
is wet. Never attempt to install the
standpipe from the top of the box.
