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Backwash Valves
 Multiport
valves usually have 6 positions (Some
Jacuzzi valves
have 7 and some American valves have 8).
The positions are usually labeled:
Filter,
Backwash, Rinse,
Recirculate, Closed
and Drain/Waste.
These are described
below in more
detail.
When you move the multiport valve from
Filter to Backwash, you are reversing
the direction of water into and out of
the filter. (which is where we get the
word "back-wash").
How
Long do I backwash my filter for?
Backwash until the water runs
clear out the waste line. Usually about 2 - 3 minutes. You may
need to add water to the pool before or after backwashing. On a
D.E. filter the last step is to add the fresh D.E. powder to the
filter, through the skimmer.
When
do I need to Backwash?
When the pressure gauge indicates
a pressure rise of 8 - 10 lbs above the clean, or start-up
pressure.
What
Maintenance do I need to do for my Multiport Valve?
There really is no maintenance on a
MPV.
Just make sure to winterize properly if
you are in the
snowbelt.
Help!
My Multiport Valve leaks out the waste line all the time!?
You most likely have "blown a
gasket". Remove the lid and handle assembly from the valve body
and inspect for warped or damaged
spider gaskets.
Help!
My Multiport Valve leaks out the top cover all the time!?
Beneath the lid, there are several
washers, a spring to give tension to the handle, and some stem
o-rings on the stem that connects to the handle. One or more of
these may need to be replaced. You can also purchase a Key
Assembly, which is every-thing that comes out of the valve body
when you remove the cover screws and lift it out by the handle.
You can view a schematic of your valve in our
valve parts department.
-
 FILTER: Keep it
here 99% of the time, except when backwashing, rinsing or wasting.
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RINSE: Use
this setting for about 20 seconds after
backwashing to rinse tank.
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RECIRCULATE: Use this if the filter's broken; at
least you're circulating the water.
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BACKWASH: Use this setting to reverse the flow in
the filter and send water out of the waste line. Make sure valves
are open or hoses rolled out.
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CLOSED: Put here to close off flow from the pool,
usually to work on the equipment. Do not operate pump with valve in
closed position.
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WASTE/DRAIN: Another filter bypass setting (like
Recirculate), but this setting sends the water out of the waste pipe
(hose), instead of returning it to the pool. Used to lower pool
water level or to vacuum to waste if vacuuming fine, silty debris or
algae.
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