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,
These are described below in
you move the multiport valve from Filter
to Backwash, (always shut pump off first) you are reversing the
direction of water into and out of
the filter. This is where we get
the word "back-wash", from sending the water backwards thru the pool filter tank during backwashing.
Long do I backwash my filter for?
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. Also effective with D.E. filters is to backwash 2 or 3 times, for a total of 5 mins. Backwash for 2.5 mins, filter for 20 secs, Backwash for 1.5 mins, filter for 20 secs, Backwash for 1 minute, then back to the filter position. This removes more DE powder than just a single backwashing.
do I need to Backwash?
the pressure gauge indicates a pressure
rise of 8 - 10 lbs above the clean, or
start-up pressure, when flow rate is significantly reduced. Always shut off the pump first before turning a multiport valve handle.
Maintenance do I need to do for my Multiport
really is no maintenance on a MPV.
Just make sure to winterize properly if
you are in the snowbelt.
My Multiport Valve leaks out the waste
line all the time!?
most likely have "blown a gasket".
Remove the lid and handle assembly from
the valve body and inspect for warped or
My Multiport Valve leaks out the top
cover all the time!?
the multiport 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 filter backwash valve in our valve
it here 99% of the time, except when
backwashing, rinsing or wasting.
this setting for about 20 seconds
after backwashing to rinse tank.
this if the filter's broken; at least
you're circulating the water.
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.
here to close off flow from the pool,
usually to work on the equipment.
Do not operate pump with valve in
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.