By Hayward Pool Products



Part # W3S180T

Warranty 1 Year

Alternate Part #'s HAYW3S180T

Product Description

Inyo Recommended Filters

Hayward sand filters are the very latest in pool filter technology. Molded of durable, corrosion-proof polymeric material, they feature attractive, unitized tank construction for years of trouble-free operation with only minimal care. Pro Series sets a new standard for performance, value and dependability. 


  • In-ground pools of all types and sizes
  • In-ground spas--(residential or commercial)
  • Water features--(fish ponds, fountains, water gardens)


  • Flange clamp design allows 360 degree rotation of valve to simplify plumbing
  • Integral top diffuser ensures even distribution of water over the top of the sand media bed. Full-size internal piping provides smooth, free-flowing performance
  • Unitized, corrosion-proof filter tank molded of rugged, colorfast polymeric material for dependable, all-weather performance
  • 6-position Hayward Vari-Flo control valve with easy-to-use lever-action handle lets you dial any of the 6 valve/filter functions. Integral sight glass lets you see when backwash cycle is completed
  • Efficient, multi-lateral underdrain assembly, with 360 degree slotted, self-cleaning laterals, gives totally balanced flow and backwashing
  • Integral molded drain plug for easy draining of tank, without the loss of sand 

Click here for more Hayward Filters

Product Specifications

Plumbing Size:
1 1/2 in.
150 lbs.
Flow Rating:
35 GPM
Filtration Area:
1.75 sq. ft.
Valve Location:
Valve Type:
Turnover 8 Hrs.:
16800 gal.
Turnover 10 Hrs.:
21000 gal.
18-1/2 in.
35 in.
Sand Required:
150 lbs.

?     Asked on 6/8/2006by Guest

How much sand is needed for this filter?

A  Answered on 6/8/2006 by InyoPools Product Specialist Patrick P.

150 lbs.

?     Asked on 1/27/2012by Guest

When should I change the sand in my filter?

A  Answered on 1/27/2012 by InyoPools Product Specialist Patrick P.

You should change the sand in your filter every 5-7 years. You can generally tell that it is time if your pool water is not as clear as it normally is or when you notice the interval between backwashes is shorter. You can use > this guide to walk you through it.

?     Asked on 3/1/2012by Guest

How often do I have to replace the sand in my filter? What is normal operating pressure?

A  Answered on 3/1/2012 by InyoPools Product Specialist Patrick P.

On a "fresh start-up" a filter would operate anywhere between 10-20 psi. As a general rule of thumb you only want to backwash when the pressure increases 8-10 psi. You want to make certain that the pump is being turned off whenever you move the handle on the valve. Once backwashing is complete (3-5 minutes), you can switch to the rinse option to re-settle the sand bed. Sand will typically last 5-7 years. Premature backwashing will wear down the size of the sand which will cause difficulties such as cloudy water and higher operating pressures.

?     Asked on 5/20/2015by Rich

My pool is a 24 ft. dia above ground (13,500 gallons) and I'm using a 1 hp motor on my pump with 1 1/2 inch pvc plumbing. Will a Hayward #S180T be a good selection to replace my worn out 20 year old sand filter? If not, what model would you recommend? Thank you.

A  Answered on 5/20/2015 by InyoPools Product Specialist Patrick P.

Hi Rich, The Hayward S180T would be a great replacement sand filter for your sized pool. Also the S180T pairs nicely with a 1 hp pump.

?     Asked on 5/28/2015by Joe

Can an inline chlorine be used with the S180T.

A  Answered on 5/28/2015 by InyoPools Product Specialist Patrick P.

Hi Joe, Yes an inliine chlorinator can be used with the S180T filter. You would just want to make sure you plumb the chlorinator after the filter.


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