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conjunction with an ASME/ANSI A112.19.8-2008a or VGB 2008 approved suction
fitting(s), or an approved channel drain system at each suction outlet or drain
outlet.
For newly constructed pools or spas where two or more suction outlets are
employed, it is important that the outlets be separated by three feet, with minimum
2-1/2” diameter connector piping and fittings. Larger diameter connector piping
and fittings may have to be used to keep connector pipe velocity less than 3 feet per
second when all suction outlets are functioning at maximum rated flow
.
No special tools to install the Vac-Alert
TM
SVRS are required. Here is what you need:
1. Portable drill with 1” or 1-1/4” hole saw type bit (if installing a snap or clamp-on tee)
2. Hacksaw or PVC pipe cutter
3. Flat bladed screwdriver
4. Small level (used to ensure vertical, level installation of the SVRS unit)
5. PVC primer and glue (medium body suitable for wet or dry field conditions)
6. 6” length of 1-1/2” diameter Schedule 40 PVC pipe (vertical section of pipe installed
between SVRS and tee, or SVRS and elbow).
7. Schedule 40 PVC tee fitting (size of suction line)
8. Full-port ball valve, slide gate or butterfly valve, or pole-mounted test mat
9. Standard Schedule 40 PVC fittings necessary to adapt the SVRS to existing piping
10.
Spanner tool located in the box insert provided with the SVRS unit.
Begin by checking the vacuum levels at each pump. Close off all other secondary lines
and check the vacuum level with all flow coming from the main drain line. If the vacuum
level is over 15”, see previous suggestions for lowering system running vacuum level.
NOTE: Do not use a flow restricted test valve, or a slow acting test valve such as a
gate, globe or diaphragm type valve. Use only full-port, fast-acting test valves such
as a two-way valve, ball valve, or butterfly valve. A test valve may not be required if
the SVRS can be mat tested. Use only a pole-mounted test mat for mat testing of
Vac-Alert
TM
SVRS units. It is recommended that a test valve be installed to facilitate
testing and inspection. A test valve may be required by local inspection authorities.
Determine
the number of pumps and main drain suction lines to be protected. You will
need to install a Vac-Alert
TM
SVRS for each pump plumbed to a dedicated main drain
suction line. See enclosed installation diagrams.
One Vac-Alert
TM
SVRS unit can be used on a pool / spa combination where a single
circulation pump is employed. In this case the SVRS is located on the common main
drain line for both the pool and spa (see installation diagrams). The SVRS can handle a
difference of no more than 6” Hg between the operating vacuum level in pool mode, and
the operating vacuum level in spa mode. System adjustments may be necessary to insure
the two running vacuum levels don’t differ more than 6” Hg.
Next,
determine the size of the main drain suction piping. Determine the Schedule 40
PVC fittings you will need to adapt the 1-1/2” diameter SVRS connection to the existing
piping. The SVRS must be mounted in the vertical position. Some installations may
require a Schedule 40 PVC reducing bushing, elbow, and pipe nipples to complete the
