Atlantic Water Gardens 4' Flexible Hardscape Basin - Manual (Page 7)

When plumbing multiple fixtures, run a main feed line along the back of the
wall, teeing up to the individual fixtures (Figure 8). If plumbing multiple fixtures,
it is best to install a ball valve in each line feeding the fixtures to provide more
control over water flow. When running more than three fixtures, the main feed
line should be increased to at least 2”. It is recommended to build a drain plug
into the manifold for winterization.
6. Winterizing the Basin
In areas where freezing is a concern, the pump(s) must be removed from the basin
before freezing and stored in a dry place. Remove the drain plug (if installed) to
drain the plumbing for winter. If a drain plug is not installed, drain the water in
the basin to below the bulkhead. Using a wet/dry shop-vac, vacuum out the water
lines and then insert a 1½”male threaded plug into each bulkhead. This will keep
the lines from refilling and freezing over the winter.
7
Feed Line
Drain Plug
Figure 8