Hayward Pro Series 18" Above Ground Pool Sand Filter System with Pump Logo

Question about Hayward Pro Series 18" Above Ground Pool Sand Filter System with Pump

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After replacing the sand in a sw256t swimpro

After replacing the sand in a sw256t swimpro filter, the pressure is fine for about 2 hrs. then drops off to almost nothing. The pool is dirty and I need some help

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Try the owners manual for these pool filters. It has some really useful troubleshooting guides that should help you get this figured out.

http://www.backyardcitypools.com/images/hayward/pro-series-manual.pdf

Posted on Aug 31, 2010

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We need to change the sand in our filter ,it is a sw256t hayward ,but dont know how to remove other sand,does anyone know how?

Once you have the plumbing disconnected and valve removed,
Use a shop vac. Works well.
Once the sand is almost all removed, you can tip the tank over & rinse out with hose for the rest.
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Have a Hayward side mount pro series sand filter. Just recently the top lid has been popping off . Clamp appears to be in good shape. getting a pressure build up. Any thoughts on the cause/

A pressure build up, indicates several possibilities: 1. An obstruction or closed valve after the filter. 2. A clogged filter. If your filter is equipped with a multiport valve, try the valve setting in the backwash or bypass settings and see if the pressure changes. in the bypass setting, if the pressure remains, you have an obstruction or closed valve after the filter. if the backwash setting causes the pressure to drop, you either have a seriously clogged filter or an obstruction or closed valve after the filter. Assuming the sand is less than 2 years in place, have you checked the sand condition by digging down into the sand deep and checking to see how much debris is still in it? Sand filters DO NOT backwash everything out and will build up over time, requiring a complete dump, clean and refill with fresh filtration sand. If you take the time 1 or twice a season to manually stir up the sand and then backwash repeatedly after stirring it up, you can keep the sand in place for several more years of service. If you live in an area with hard water, it is not unusual to see the sand turn hard like concrete and have to be replced after only a couple years of use. This is typical when pool water pH is high and proper maintenance of the chemistry is neglected. As to the lid popping off, this means the pressure is excessive or the clamp is damaged.

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If there is not much pressure, the problem is with the circulation system. Probably the pump.
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The most common solution for a loss of pressure is to dissasemble the wet end of the pump, clean out the impeller, and replace all o-rings and seals, including the shaft seal. This will revitalize the performance of your pump.
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