Section 4. Plumbing The Sheer Descent Waterfall; Waterfall Return Line Plumbing - Zodiac Sheer Descent Installation And Operation Manual

Page 12
ENGLISH
Figure 11. Sheer Descent Filter/Strainer (p/n 3456)
When plumbing a pump dedicated for use by the Sheer
Descent, a separate suction line to the pool must be
plumbed. This should be plumbed in a minimum of 2
inch schedule 40 pipe.
WARNING
The suction outlet (drain) assembly and its cover
must comply with the latest version of ANSI/ASME
A112.19.8, the standard for Suction Fittings For Use
in Swimming Pools, Wading Pools, Spas, and Hot
Tubs, or its successor standard, ANSI/APSP-16.
A Sheer Descent filter/strainer (p/n 3456), or equivalent,
must be installed on the return side of the pump,
between the pump and the waterfall. Refer to Figure 11.
FILTER IS REQUIRED for separate pump installations,
as large debris must not be allowed to enter the waterfall
unit. For installations requiring up to 60 gallons (227 l)
per minute, use one Sheer Descent filter/strainer. For
higher water requirements, use two or more filters
plumbed in parallel. A separate return line, with a three
way valve plumbed in such a way that water can be
NOTE: At least two (2) (anti-entrapment)
which are listed/certified as complying
with ANSI/ASME A112.19.8-2007 or its
successor standard, ANSI/APSP-16.
ANSI/APSP-7, the American National
Avoidance in Swimming Pools, Wading
Pools, Spas, Hot Tubs, and Catch Basins.
Figure 12. Filter Pump Installation
Zodiac ® Sheer Descent
7"
9 3/4"
Cantilever Edge
Sheer Descent Unit
Tile
Water Line
suction outlets provided with covers
Suction outlets (drains) should be
installed in accordance with
Standard for Suction Entrapment
and Fiberfall ® Water Features
®
balanced between the waterfall and return back to the
pool, is also required. See Figure 12.
Section 4. Plumbing the Sheer
4.1

Waterfall Return Line Plumbing

NOTE If the waterfall flow rate exceeds more that
40% of the filtration flow, a separate pump is
recommended.
The waterfall feed line, from either the main filter pump
or a separate pump, should be plumbed with a pipe
size capable of handling the required flow rate of the
waterfall. See Table 1.
NOTE Two inch plumbing or larger is suggested for
waterfalls over 5 feet in total length. Refer
to Hydraulic Guideline Chart, Table 1, for
specifications. The feed line should end near
the back of the bond beam near the center of
the waterfall location.
Table 1. Hydraulic Guideline Chart
Suction (SUC) and Discharge (DIS)
Pipe Size
1½" 37 gpm (140 lpm)
2" 62 gpm (235 lpm)
2½" 88 gpm (333 lpm)
3" 136 gpm (515 lpm)
4" 234 gpm (886 lpm)
* Max SUC Flow based on 6 feet (1.8 m) per second velocity.
** Max DIS Flow based on 8 feet (2.4 m) per second velocity.
It is important to have a valve located in a convenient
location on the feed line to regulate the flow of water to
Conventional
Concrete Decking
Separate Return
to Pool
Suction Line
|
Installation and Operation Manual
Descent Waterfall
Water Flow Chart for PVC
Max SUC Flow* Max DIS Flow**
50 gpm (189 lpm)
82 gpm (310 lpm)
117 gpm (443 lpm)
180 gpm (681 lpm)
313 gpm (1185 lpm)
Jandy
®
Three Way Valve
Sheer Descent
Filter/Strainer
Filter
Pump