Hayward S311SX Owner's Manual

Models S311SX, S311SXV, S360SX
Your Hayward Pro Series high-rate sand filter is a high
performance, totally corrosion-proof filter that blends superior
flow characteristics and features with ease of operation. It
represents the very latest in high-rate sand filter technology.
It is virtually foolproof in design and operation and when
installed, operated and maintained according to instructions,
your filter will produce clear, sparkling water with only the
least attention and care.

HOW IT WORKS

Your filter uses special filter sand to remove dirt particles
from the water. Filter sand is loaded into the filter tank and
functions as the permanent dirt removing media. The pool
water, which contains suspended dirt particles, is pumped
through your piping system and is automatically directed by
the patented filter control valve to the top of the filter tank.
As the pool water is pumped through the filter sand, dirt
particles are trapped by the sand bed, and filtered out. The
cleaned pool water is returned from the bottom of the filter
tank, through the control valve and back to the pool through
the piping system. This entire sequence is continuous and
automatic and provides for total recirculation of pool water
through your filter and piping system.
After a period of time, the accumulated dirt in the filter causes
a resistance to flow, and the flow diminishes. This means it
is time to clean (backwash) your filter. With the control valve
in the backwash position, the water flow is automatically
reversed through the filter so that it is directed to the bottom
of the tank, up through the sand, flushing the previously
trapped dirt and debris out the waste line. Once the filter is
backwashed (cleaned) of dirt, the control valve is manually
resequenced to Rinse (Vari-Flo Control Valve only), and
then Filter, to resume normal filtering.

INSTALLATION

Only simple tools (screwdriver and wrenches), plus pipe
sealant for plastic adapters, are required to install and/or
service the filter.
1. The filter system should be installed, not more than 6
feet above pool water level, on a level concrete slab,
very firm ground, or equivalent, as recommended by
your pool dealer. Position the filter so that the piping
connections, control valve and winter drain are
convenient and accessible for operation, service and
Winterizing.
2. Assemble filter control valve to filter. Align the two (2)
valve pipe connections, with O-rings in place, with the
two openings in the side of the filter tank and press in
firmly. Secure the assembly to the tank connections with
the two bulkhead locknuts.
Do not overtighten.
31" (79 cm) S311SX
36" (91 cm) S360SX
NOTE: If rigid return piping is used, installation of a piping union is
recommended for ease of future servicing.
IS311SX-00A
38-1/2" (S311SX)
(95 cm)