Question about Hayward SAND FILTER, PRO SERIES

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My sand filter is showing 0 pressure on the pressure gauge, yet I still have great flow? It is showing no pressure on any of the settings--It was working just fine last year.

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  • 106 Answers

If flow is good, one of two things. Unscrew gauge and see if hole is plugged. With gauge out, momentarily turn pool on and make sure water squirts out of hole. If no, hole is plugged, If yes, bad gauge.

Posted on May 05, 2010

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1 Answer

Why is not alot of pressure from the flow and this just started this week


low pressure is what you want from a sand filter (gauge wise) its when it goes high you need to backflush/stir the filter

Jun 23, 2014 | INTEX Sand Filter Pump

3 Answers

My hayward sand filter pool guage is registering 0 although the pool seems to be running fine. Guage was just replaced last summer.


  • Those spring type gauges break constantly, most likely broken again, they cost a couple bucks extra but liquid filled are much more durable, just don't forget to remove if you live where it freezes.

May 24, 2014 | Hayward SAND FILTER, PRO SERIES

2 Answers

Pressure psi filter


Is there water flowing into the pool? If the flow is there it may only be that your gauge is stuck. If not make sure the pump pot (where the basket is by the motor) is full of water before starting. If the pump has water + is running + no psi showing + no water flow, then you likely have an impeller issue. The pump needs to be opened up to see if the impeller is clogged or broken.

May 29, 2013 | Hayward SAND FILTER, PRO SERIES

1 Answer

Pressure gauge not working


Is the unit filtering? Is there pressure and flow at the discharge to the pool? Is there suction at the skimmer? Is there movement at the basket strainer? If you answered yes to all these questions then replace the gauge.

May 23, 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

My hayward sand filter is running but not filtering or doing anything pressure on gauge is not moving and i checked for clogs nothing can someone help me out or let me know where to start.


Is the pool pump working? If not then the filter won't work and no pressure will show pressure.
If the pump runs, is it flowing water through the filter? If the backwash valve is not set to "FILTER" then it will not filter. If it is not working yet then please send me the results and I will try to figure it out. Thank you.

Aug 24, 2011 | Hayward SAND FILTER, PRO SERIES

1 Answer

I forgot to mention that when I purchased from a friend the pressure gauge reading is zero. From what I read something is wrong.


If the gauge reads zero, the pump is not pumping much water, the multiport valve is not set to filter, or the gauge is bad. I think I missed one of your posts but it sound like a flow problem, either at the pump or through the filter.

Aug 25, 2010 | Hayward SAND FILTER, PRO SERIES

1 Answer

Filter pressure is 0


I'm assuming the pump runs, and the water is circulating from the skimmer back to the pool. Do have the pump running when checking pressure? Second be sure "filter" is selected on multi-port valve. Third, remove gauge with pump off and test gauge with compressed air and be sure gauge is working (don't overpressure gauge depending on gauge scale) If gauge is defective replace. If you still have no pressure on gauge, you might be "bypassing" the filter media (sand) due to a broken pipe from the bottome of the multi-port valve. You sould still see some pressure though as your pump should have some back pressure to the pool.

Jul 04, 2010 | Hayward SAND FILTER, PRO SERIES

1 Answer

How to open pool, fill sand filter with water?


I happen to have a copy of the users manual for this pool filter. These are the instructions for operating your filter.

1. Be sure correct amount of filter sand media is in tank and
that all connections have been made and are secure.
2. Depress Vari-Flo control valve handle and rotate to
BACKWASH* position. (To prevent damage to control valve
seal, always depress handle before turning.)
3. Prime and start pump according to pump instructions (be
sure all suction and return lines are open), allowing the filter
tank to fill with water.
WARNING: ALL SUCTION AND
DISCHARGE VALVES MUST BE OPEN WHEN
STARTING THE SYSTEM. FAILURE TO DO
SO COULD CAUSE SEVERE PERSONAL
INJURY.
Once water flow is steady out the waste line, run the pump for
at least 2 minutes. The initial back-washing of the filter is
recommended to remove any impurities or fine sand particles
in the sand media.
4. Turn pump off and set valve to RINSE position. Start pump
and operate until water in sight glass is clear—about 1/2 to 1
minute. Turn pump off, set valve to FILTER position and
restart pump. Your filter is now operating in the normal filter
mode, filtering particles from the pool water.
5. Adjust pool suction and return valves to achieve desired
flow. Check system and filter for water leaks and tighten
connections, bolts, nuts, as required.
6. Note the initial pressure gauge reading when the filter is
clean. (It will vary from pool to pool depending upon the
pump and general piping system). As the filter removes dirt
and impurities from the pool water, the accumulation in the
filter will cause the pressure to rise and flow to diminish.
When the pressure gauge reading is 8-10 PSI (0.55-0.69
BAR) higher than the initial "clean" pressure you noted, it is
time to backwash (clean) the filter (see BACKWASH under
Filter Control Valve Functions.)

Apr 16, 2010 | Hayward SAND FILTER, PRO SERIES

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