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Posted on Aug 11, 2011
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The lever on my multiport valve is stuck, it is on "filter" setting, but while its running, water is also spraying out of the backwash discharge. How can take the valve apart to clean out any debris?

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  • Master 990 Answers
  • Posted on Aug 15, 2011
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You can remove the top by removing the screws around the top then remove the set pin through the handle then pull the diverter disc from the top and replace the "O" rings inside the top and relube the shaft. The plastic in the top could very well be scratched and worn beyond repair and most times it's easer to just replace the whole top assembly.

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0helpful
1answer

How to backwash sand pro 550

turn filter off turn multiport to backwash turn pump on you should see water coming out of the waste line (make sure you have a hose on it with clamps) run for a coupleof minutes until water in sightglass goes from dirty to clear turn off pump turn multiport to rinse turn pump on run for 30 sec then turn off turn multiport to filter then turn back on thats all
tip

Backwashing A Sand Filter with A Push/Pull Slide Valve or Multiport Valve

Lots of people are first time pool owners and pool professionals forget to teach these "newbies" about the simplest aspects of pool ownership.

One of the biggest questions we receive from new homeowners is "How do I go about backwashing my sand filter exactly?"

It doesn't matter if you have a Hayward, Pentair, Jandy, Sta-Rite or any other number of Sand Filters on the market they all utilize the same basic valves for backwashing; a push/pull slide valve or a multiport valve.


To backwash with a multiport valve:
1) Shut off pump motor.
2) Press down on valve handle, rotate valve from FILTER to BACKWASH position.
3) Roll out any backwash hose or open any waste line valves.
4) Open air bleeder assembly on filter, and turn pump on.
5) Watch pressure gauge for backpressure and hose for kinks. Be prepared to shut off pump quickly.
6) After hose fills with water, run for 3 - 5 minutes or until water runs clear.
7) Shut off pump motor and move multiport valve handle to RINSE position. Run on rinse for 15 - 25 seconds.
8) Shut off pump motor and move multiport valve handle to FILTER position.
9) Turn pump back on and note lower pressure.
10) Roll up backwash hose so the dogs use it as a chew toy.


To Backwash a sand filter with a slide valve:
1) Shut off pump motor, roll out backwash hose.
2) Twist to unlock plunger T-handle, push or pull(depending on manufaturer) the plunger 2" - 3".
3) Open air bleeder assembly on filter, and turn pump on.
4) Watch pressure gauge for backpressure and hose for kinks. Be prepared to shut off pump quickly.
5) After hose fills with water, run for 3 - 5 minutes or until water runs clear.
6) Shut off pump motor and push T-handle back down into locked position.
7) Turn pump back on and note lower pressure.
8) Roll up backwash hose.

Now you are a backwash Guru!

More tips and tricks are available form The Ugly Pool Guy, www.WeFixUglyPools.com
on Dec 14, 2010 • Pool & Spa
0helpful
3answers

How do you backwash your pool

if you have a sand filter or de filter turn system off then turn multiport to back wash turn back on let run until the backwash glass is clear turn off then turn to rinse turn back on for about 20 sec then turn off then turn multiport back to filter then turn back on
0helpful
1answer

How do I get into the filter to check backwash valve?

you shouldnt have to go inside the filter that is done in the multiport
turn system off turn multiport to backwash till water comes out clean shut off then turn lever to rinse for about 30 seconds turn off pump again turn lever to filter you should see more water pressure coming out of pool return
1helpful
1answer

How to know what cycle to use or when to use filter, backwash or rinse?

during normal operation, your multiport valve should be in the "FILTER" position.

Once the pressure in the filter reaches 10psi more than what it was when the filter was clean, you should backwash. turn the pump off, press down and turn the multiport valve to backwash. turn the pump on and watch the effluent water until it goes from dirty to clean. Then place the multiport valve to the rinse position, this will rinse any remaining dirt from the top of the filter and valves so that it does not return to the pool. Once the water comes out clean, return the valve to the filter position.

Do not turn the valve while the pump is on, always make sure to turn the pump off before servicing any equipment.
1helpful
1answer

Sand and murky water being discharged into pool after backwash

You posted this question in Alarm category. but sounds like either your filter laterals, or the backwash valve are bad. I'd need to know what type of filter, and backwash valve you have. is the backwash valve a multiport, or push/pull slide valve, etc... If it's a push/pull valve then the o-rings, or pucks can be bad, or the piston can be broken. if it's a multiport valve, then the spider gasket may need to be replaced. if it's a top mount multiport valve, then it can be broken inside the filter.
0helpful
2answers

Pentair Quad DE system was installed without multiport valve

This is a DE (Diatomaceous earth) IT doesn't have sand and doesn't backwash. You use the bump handle (with pump off and valves closed and vent open and drain dirty water/earth out) Here is a link to the manual for your filter If isn't the exact model they are all on their web site: http://www.haywardnet.com/products/Manuals/pdfs/manual9.pdf
0helpful
1answer

What do i do with the waste line port on the multiport valve on a hayward filter. do i attach a fitting to stop air

No. That port is there for when you backwash or pump to waste. You normally put a hose adapter there that allows for a collapsable backwash line to be attached when ready to backwash the filter. If it is leaking water there when the valve is set to something other than waste or backwash yuou need to replace the internal gasket in the valve.
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