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Need to know how to backwash the pool filter

Our pool has the Hayward Pool Boss Pool System Control. Specifically I need to know how to backwash or clean the filter. I know this system has now been discontinued and just moved into a house with this pool system installed. The valves don't have any labels on them and I'm not sure how to get it done. Any help you can offer would be greatly appreciated. Thanks!

Posted by Anonymous on

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Depends ...

There are two primary valve styles ... a "multi-port" and "push-pull". Never change a valve setting with the pump running.

Multiport has a handle that goes around in a circle (only move it clock-wise). You should go to your pool place to identify this kind of valve and get new lables. Push-pull goes up and down. Up is filter - Down is back wash.

If you will study your system, some things will become evident to you .

Your pump pulls water from the pool through the pump ... out of the pump into the filter. Through the filter, back to the pool. You might be heating the water (would be after the filter) and you may be adding sanitiser (after the heater). One suction - two discharges (oh, the other discharge is to waste.).

Recap ... water out of the pool into the pump - out of the pump throuth the control valve to the filter - out of the filter to the heater then to the sanitiser then back to the pool.

Any help?

Thanks for your interest in FixYa.com

BTW ... I am a volunteer question catcher at FixYa.com. At my job, among other things, I am a Certified Pool Operator (CPO), certified by the National Swimming Pool Foundation.

Posted on May 16, 2010

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1 Answer

I have a hayward sand filter pro series and for some reason the water from the pool keeps draining I need to know if the switch at the top is at the right direction


check to see if water coming out of backwash valve while if filter position bad multiport gasket you can put a valve on it and close when not backwashing

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When my filter is in the filter position i am losing a little bit of water coming out of the waste and backwash pipe


The gasket or o-rings on your backwash valve are leaking. Bring any part of your valve to a pool store and they will know the parts you need.

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I need to know what all the settings are like bacwash filter on the valve system


FILTER is the valve position when the system is in the normal filtering mode.
When you backwash the filter you first need to turn off the pump, place in BACKWASH position, and run the motor for 45 seconds (or until the backwash water is clear). Turn off pump and run in the FILTER position for 15 seconds. Repeat twice more.
The RINSE position is to clear any dirt in initial start-up cleaning, plus resetting filter bed after backwashing.
The WASTE
position is for vacuuming directly to waste, lowering pool level, or draining the pool.
The CLOSED position is for shutting off all flow through the valve.
The RECIRCULATE position allows water to flow from the pump through the valve and directly to the pool.

You will probably only to use the FILTER, BACKWASH and maybe the RINSE valve position. The RINSE position is not as important as indicated by the fact that many backwash valves don't have a RINSE position.

I hope this helps.


Sep 05, 2011 | Hayward SAND FILTER, PRO SERIES

1 Answer

The labels at the top of my pool has faded. I don't know which slot is for backwash? Does anyone know which slot is for what? I need to re-label my lid to know which one is off, on, pump, backwash...


typical is opposite of filter easiest solotion would be to try it water should come out of the waste/backwash port 1200 oclock is filter 6oclock might be backwash

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1 Answer

Need to know how to backwash the pool filter


Send pictures of the valve assembly to info@coastsideservices.com and we will try and assist you with your need.

Mar 23, 2010 | Pool & Spa

1 Answer

How do you backwash the pool using hayward pump system


BACKWASH THE FILTER.. NO LABEL ? SEARCH YOUR FILTER BRAND AND LOOK FOR REPLACEMENT PARTS (VALVE) OR GO TO YOU LOCAL POOL STORE AND SEE IF THEY CAN HELP YOU.. TAKE A PICTURE WITH YOU.. VOTE PLEASE IF'N I WAS OF HELP

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1 Answer

No green comes out in backwash


Alge will quit often go through filter so first you need to kill the alge by super chlornateing the pool. You can take a water sampel to your pool store and give them the size of your pool, they can test your water, for nothing in most cases and recomend what you will need for this. Then you can start cleaning the mess up as the dead alge will turn to dirt. This dirt will be very fine and may go through your filter also so a cup full of D.E. in your skimmer after backwashing will usually coat the top of your sand and catch much finer dust and dirt. Do this as you clean the pool and backwash 1-2 times daily till clean. Follow all directions given to you at store to kill the alge first, this is very importiant.

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How do i drain my pool with a hayward variflow pump?


To Flush out the filter with the backwash setting. The backwash setting releases trapped particles from the filter back into the swimming pool. You may need to alternate between the rinse and backwash settings until the water runs clear in order to unblock your filtration system and flush out clogs. To Rinse away dislodged items from the backwash setting. The rinse setting flushes clean water through the pipes and carries away any particles or clogs freed during the backwashing. To Drain the pool select waste on the multiport valve. This sends the water directly to the drain rather than back into the swimming pool. Close the filtration equipment and stop the pump with the closed setting. You should only use the closed setting when you turn the pump off. This function allows you to remove the strainer basket, clean the filter tank and perform other swimming pool maintenance on the filtration system.

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1 Answer

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You need to replace the seal in the head unit of the filter.. The sand should be replaced every three years or buy a cleaning solution.

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