Step 4 Plumb and Level the waterfall filter unit & installing the bulkhead:
First off, before leveling the waterfall unit, install the two bulkheads into the back
of the filter. This unit is predrilled with two openings on the back allowing you several plumbing options
1. For single pump installation, glue your PVC flex pipe to one of the bulkhead fittings, and simply cap the other bulkhead (fitting included in Pondless« Waterfall kit).
2. For two pump installation, attach both PVC flex pipes, one to each bulkhead.
Drain Kit option- A drain kit can be attached to the second bulkhead fitting on single pump
installation applications. The drain kit allows you the ability to perform water changes more easily and makes your annual cleaning of the waterfall filter much easier.
Install the bulkhead fittings in the predrilled holes provided in the back of the Waterfall filter. The rubber washer should be
located on the inside of the Waterfall unit and the plastic washer on the outside. First, hand tighten the nut on the outside and then finish with a large pair
of channel lock pliers until the rubber washer begins to bulge. This should only be approximately one full turn past hand tight. Beware of over tightening the nut, which
could possibly crack the bulkhead. Note that the bulkhead fitting is reverse threaded. So, righty tighty, lefty loosey doesn't apply here. In other words, turn the nut
counterclockwise to tighten it.
You can install the PVC MPT (Male Pipe Thread) to slip fitting into the desired bulkhead to receive the pump plumbing. The PVC plug
fitting is provided and can be installed in the second bulkhead fitting if it is not going to be utilized. We recommend using some of the silicone sealant included in
pondless waterfall kits or Teflon tape (not included) to coat the threads of the fittings, in order to provide a watertight seal. SKIPPING THIS STEP, IS A COMMON DO-IT-YOURSELFER MISTAKE
Once this is complete, it's time to position the waterfall unit in the desired location.
We recommend setting the waterfall filter unit at or slightly below the grade of the yard. Remove a section of sod if needed
or just a few inches of soil in order to create a firm foundation for the Waterfalls filter unit to live.
DESIGNER TIP- "Don't build volcano waterfalls, keep the waterfall to the scale of the yard. Your goal should be to create the illusion that Mother Nature herself
has installed it. Avoid creating a volcanic look by trying to raise the waterfall up four or five high in a perfectly flat backyard."
The area beneath the waterfall filter unit must be compacted thoroughly by using a hand tamper. This will help prevent the pondless
filter box from possibly settling in the future.
Use a two-foot bubble level in order to make sure your waterfall unit is properly set into position. It is important
that your waterfall filter unit be level from side to side and tilted forward at ╝ of a bubble on a 2' level. This will ensure the water comes over the front of
the Waterfall unit and covers the entire spillway.
Glue the Flexible PVC Pipe:
Now the filter is ready for the flexible PVC to be primered and glued into place using the PVC cement you will find in your pondless waterfall kit,
specified for use with flexible piping.
Prime both the inside of the PVC fitting and the outside of the pipe where the flexible PVC cement will be applied.
After priming is complete, apply the specific PVC cement to the fitting and the PVC pipe and fit the two pieces together, turning
slightly as you push them together.
It is recommended that you hold the pipe into the fitting for at least 60 seconds to allow the glue to slightly set.
Wait approximately 10-15 minutes to let the glue completely set before you begin to backfill the waterfall filter with soil and bury the connection.
Before backfilling around the waterfall filter, you should install the support racks. Otherwise, you may not be able to get it in
place before you get out of control with the tamper and tweak the unit.
It is also recommend that someone stand inside the pondless filter box to keep it level and in place and while it's being backfilled and tamped.
The excavated soil from the basin can be backfilled around the sides and back of the
Waterfall filter. Tamp the soil during backfilling in order to reduce settling. Any additional soil can be spread
around the far side of the pondless feature in order to create a planting bed for perennials and annuals.
Take the extra time to double check and make sure the waterfall filter unit is still level
after installing the plumbing.