Question about Hayward S166T Pool Filter System w1 HP PumpS166T92S ()

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I have a hayward s166t filter, guage reads 0 and sight glass water does not swirl when backwashed

I have a hayward s166t filter with new head , guage, sand, everything seems good, but when i backwash the water comes out line but some water runs in the sight glass but does not swirl, also the guage is brand new and the old guage register 0 pressure registered

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  • Hayward Master
  • 1,631 Answers

Does it show pressure when in "Filter" mode?

If not, then your pump is either not primed, Impeller is plugged, or there is not enough water in the pool, you are sucking air.

Posted on Jan 27, 2014

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6 Suggested Answers

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Posted on Jan 02, 2017

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SOURCE: sand in my waste water

O-rings or gasket are replaced to stop leaks, so that wouldn't have helped you.

It could be one of two things; either the white PCV-like pipe in the filter tank is cracked OR some of the laterals at the very bottom of the tank, under the sand, has melted. A whole new underdrain assembly is usually $70.

Posted on Sep 05, 2009

  • 990 Answers

SOURCE: My Hayward Swimpro Sand filter is not backwashing

Be sure it is not plumbed backwards and be sure you got a sand valve as a DE plumbs the other way.

Posted on Jun 26, 2010

adamh294
  • 310 Answers

SOURCE: I have a brand new S244T sand filter. During

When backwashing with this valve, it is supposed to come out the waste line. Also when in "rinse" and "waste" it will also come out the waste line. It is acting just how it is supposed to act.

Posted on May 26, 2011

  • 990 Answers

SOURCE: I have a Hayward S166T sand filter. I changed out

Your best bet is to replace the whole top assembly as the plastic top probally is etched and bad.

Posted on Aug 15, 2011

SOURCE: My new Hayward Pool Sand Filter won't backwash.

Hey!
Mine was doing the same thing. I had the hoses switched up. I had the hose from the pump connected to the port marked RETURN (on the Hayward vari pump valve). Not good! I also had the return line hose (from pool) connected to the port marked pump. It happens! The problem is I tried EVERYTHING ELSE before I found my error. This includes a trip to Leslie's to buy a brand new multi port valve (good thing they have a return policy) AND changing out my relatively new sand in the filter AND taking apart the vertical tube and each individual flange at the bottom to clean them out. Please check your hoses FIRST if it won't backwash! By the way...I've been a pool owner for 17 years. I think my experience worked against me since I didn't recheck my work at setup.
NOTE:
It might SEEM like your filter is working because you get suction at the skimmer and water rushing thru the return line into the pool. It's not working if your lines are backwards like mine were! My water started turning green!

Posted on Jun 22, 2013

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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

1 Answer

How does the water flow through the sight glass? How do I know if my pool is filtering


water only goes through sight glass when backwashing check your chemicals make sure ph and alkalinity are within spec also check chlorine total and available sounds like you need to super shock pool

Jul 24, 2014 | Hayward Pro Series 18" Above Ground Pool...

1 Answer

Just had the spider gasket replaced and now water is "gushing" out the handle


Hi Shari,
I see two possibilities. 1. The diverter shaft o-rings are not sized correctly (or missing). 2. When valve handle was reinstalled it was not oriented properly with the diverter position in valve body.
Hope this helps you.

Jun 14, 2014 | Hayward SAND FILTER, PRO SERIES

1 Answer

Is my pool pump filtering correctly?


The cloudiness or turbidity of your water indicates a leaking or damaged filter membrane/element. The green color is due to the growth of algae. Are you using the right algaecide? Is the dose right? You have to consult a water treatment specialist to know these.

Aug 06, 2012 | Hayward Pool Products Hayward Pro Series...

1 Answer

When filter is set on


The valve on top of the filter has several settings. What is yours set on. If it is set on Backwash or Rinse or Waste, it will allow the pump to send water out the drain. If you have new sand, you probably should run on the Rinse setting for awhile, then switch to Filter.

Jun 22, 2012 | Hayward S166T Pool Filter System w1 HP...

1 Answer

Hayward s166t sand filter has sand in sight glass during backwash


did you get sand in vertical tube if so it will take time to get out of line

Jun 12, 2012 | Hayward S166T Pool Filter System w1 HP...

1 Answer

I have a brand new S244T sand filter. During backwash cycle large amount of water discharges out of the waste line. Filter doesnt appear to be backwashing normally. Hayward is sending a replacement head. I...


When backwashing with this valve, it is supposed to come out the waste line. Also when in "rinse" and "waste" it will also come out the waste line. It is acting just how it is supposed to act.

May 26, 2011 | Hayward Pool & Spa

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