Question about Pentair FILTER TANK BOTTOM, 48 SQFT

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Water still flowing out waste when filter is in filter mode.

I have the same problem as thealgator. I have a Hayward S-180T-4 sand filter. I just moved into a new house and tried to backwash the filter for the first time. It now seems to be 'stuck' in backwash mode even though the lever points to filter. Is is possible that the switch is broken?

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You proberly have sand traped in handle shaft above spider gaskit.

It is best to take apart - clean - grease (pool grease) - put back together.

When backwashing (or moving handle to other postion)- let pressure build up escape before moving handle to next position.

Posted on Jul 14, 2009

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  • Pentair Master
  • 1,378 Answers

The gasket inside the valce is either out of place or damaged. You can rebuild the valve with a gasket set. For a quote on the repair kit, send your valve model number using our contact form at www.arrowpools.net and we can identify the correct kit for you.

Posted on Jul 12, 2009

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1 Answer

I have a Hayward s166t sand filter and no matter what setting I have it on tons of water is coming out of my waste line! This is my 1st pool and 1st sand filter!!


I used to work in a municipal swimming pool. 325,000 gallons!

It sounds like you have the sand filter on to clean if water is coming out of the waste line. That is called 'back flow'.

Basically, the water from the pool comes into the top of the filter and the muck settles on the top. You need to add Gypsum (Aluminium Sulphate) to the water which is a floculant. This makes organic material form into a layer on top of the sand. The flocculated layer further adds as a filter. You need to regulate the flow of water into the filter as too fast and you force sand into the pool.

When you clean the sand filter, you do a back flow. So by altering valves, you put the water from the pump into the bottom of the filter and the water lifts the muck and dirt off the top of the sand and discharges it to waste. It is important to also regulate the flow as too much will discharge the sand. That happened in our municipal pool and discharged 6 tons of sand in the space of 2 years.

your owners guide is here. Take a look at the pipes, valves and pump and work out where the flow is going to.

http://www.hayward-pool.ca/pdf/manuals/ProSeries-S166T-S166T1575XS-S166T1575XSN2.pdf

http://www.hayward-pool.ca/pdf/manuals/ProSeries-S166T-S166T1575XS-S166T1575XSN2.pdf

Jul 03, 2016 | Hayward Pool & Spa

2 Answers

How does Hayward Sand filter work


Excellent answer Robco, One slight variation of an explanation about "waste"... When in this mode, water never actually enters the filter tank, it goes in the valve from the pump, and out of the valve through the waste port.
Very similar to the "recirculate" mode, it comes from the pool with the help of the pump into the filter valve, and right back out the filter valve, without ever going into the tank, and back to the pool via the return port.

Jun 29, 2014 | Hayward SAND FILTER, PRO SERIES

1 Answer

I have a S-244T sand filter and I am noticing that my water level is going down about 3/4


When the pump is running is water discharging from the waste pipe outlet?
If so then the selector valve that switches the pump outlet to waste, backwash, filtering etc. is faulty.

Aug 21, 2012 | Hayward SAND FILTER, PRO SERIES

1 Answer

How to use backwash to waste


When the filter get clogged the pressure in the filter increases and there is less water flow returning to the pool.
If your filter is a sand filter, when you turn the valve to backwash and turn on the pump it reverses the water flow in the sand filter to flush the dirt out of the filter to waste. Look at the window openning in the waste pipe and keep the backwashing goinging until you see clear water.
Then turn off the pump and move the control valve to Rinse, turn on the pump for a few minutes, this returns the water flow back to normal but the water goes to waste to make sure the sand filter is clean.
Turn off the pump and move the control valve to filter and turn on the pump. This mode is the normal operating mode and the pressure gauge in the sand filter will show a drop in pressure.
Some pressure gauge shows a red section to indicate when backwashing should be carried out.

May 02, 2012 | Hayward Pool & Spa

1 Answer

I was curious about the height of sand needed for the filter to work properly for my Hayward pro series 180T sand filter. It is one of the old gray colored models, and would you mind giving me an...


A Hayward S180T sand filter holds 150# of sand. In other words, fill the filter 3/4 full of sand (to the point where the tank starts to round off). Make sure, however, that you fill the tank 1/2 full of water first. This will help to cushion the laterals and prevent them from breaking from the weight of the sand. Make sure to cover the hole in the top of the lateral assembly pipe with a cup or duct tape to prevent sand from going into the pipe. If sand gets into the pipe, it will come out into the pool. Don't forget to remove the cup or tape after adding the sand!

Jun 15, 2011 | Hayward SAND FILTER, PRO SERIES

1 Answer

Problem with vari-flo multipoer 1.5 and Hayward DE fiilter


You need a rebuild kit for the valve and possible a sand change. Sand should be changed ever 3 - 5 years or so depending on overall pool conditions.

The gasket inside the valve is out of place and therefore allowing water to leak out the waste port. Use a gokit to replace all the gasket/orings and you should stop the leak.

If the flow is still bad, inspect the sand and change it if necessary.

Jun 26, 2009 | Hayward SAND FILTER, PRO SERIES

1 Answer

Waste line leaking


When you had the unit apart, did you note the correct alignment of the handle to the diverter? You may have put the handle on 180 degrees away from the correct orientation and therefore flipped all the settings, making filter=backwash, etc...

If thats not it, any chance it has freeze damage inside from not draining completely and therefore needs a new valve?

May 28, 2009 | Hayward SAND FILTER, PRO SERIES

2 Answers

Waste line leaking


handle is not in filter position turn off pump move handle to different position several time make sure that no debris under handel

May 28, 2009 | Hayward SAND FILTER, PRO SERIES

1 Answer

Multi-valves on hayward sand filter mixed up


Key Cover Assy needs new spider gasket. If it is a newer model the gasket is made into the key cover and it will have to be replaced

Apr 27, 2009 | Hayward Pro Series 18" Above Ground Pool...

1 Answer

Waste line leaking


Bad gasket on diverter on the valve

Apr 24, 2009 | Hayward SAND FILTER, PRO SERIES

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