Most guages very 32 pounds backwash some read some read up to 15 to backwash but the best way to know if it needs to be backwashed is put your hand in front of return outlet where your water enters pool, it should push your hand away quickly if not backwash
To all who have questions about the routine filter maintenance procedure (how's and why's), especially if it is a sand media filter.
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If you go 28 psi or over on your gauge, you should then backwash. I typically backwash every couple of weeks to clean out my filter.
The back pressure at which it's time to backwash a sand filter is about 6-8 psi above the baseline pressure of a clean filter. Just after following the procedure to backwash and rinse your filter, check the sand filter's back pressure at the time you return the pump and filter system back into filter mode. This is the baseline pressure of your clean filter. As the filter gathers particulates from the pool water, the back pressure will rise over time, as indicated on your pressure gauge. Once the pressure reaches 6-8 psi above the baseline, it's time to backwash.
Some advice: Don't assume the baseline pressure will remain the same for your sand filter. The baseline pressure will change over time and when the sand media is replaced. Typicallly baseline pressure will go up slightly over a season due to captured particles that are difficult to backwash out. Use of a filter cleaner will help remove these captured particles.
More advice: Even with the use of filter cleaners and proper backwashing, sand media will not last forever. The constant water flow and movement of particles in the sand over time shears the surface of each little sand grain. Like a river flowing over rocks, over time each sand grain surface is smoothed, and thus its effectiveness for capturing small particles is reduced with ongoing use. A typical rule of thumb is to replace the sand media +/- 5 years. Some pool owners do it more often, some less. It depends on how long your pool season is each year and how much debris the filter much extract from the pool water.
SOURCE: 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
SOURCE: sand filter problem
The pump is to big for the pool. So with that being said it is asking you to back wash more then you should need to because it is pulling water at a much higher rate then what your pool is actually calling for. I would recommend taking it down to a 700gl and this would solve your problem. Also you can replace the drain lines and suction lines to smaller lines and that will also take care of the issue at hand but I do not recommend that at all
SOURCE: sand filter not catching little debris
help...my pump is running and I have replaced sand in filter but doesn't seem to be pulling debry into skimmer to filter it out. seems not sucking water in. What is wrong with the pump or fllter?
SOURCE: sand in backwash
You need to replace the seal in the head unit of the filter.. The sand should be replaced every three years or buy a cleaning solution.
SOURCE: sand is in pool after backwash
A little sand is normal, called a puff back. Anything more then a good pinch of sand is a problem If its a lot of sand you can check the following.
1. O-ring in side the filter valve when standpipe inserts is intact. Make sure that standpipe is not cracked and seats well into valve.
2. check spyder gasket inside filter head. (looks like a wagon wheel) if it is loose or is pulling up it will need to replaced or re-siliconed. A good indication of this being the problem is if water is leaking from backwash port.
3. Check hoses to make sure that the to pool, to pump conections have not been reversed, if this was case you would get a lotta sand into pool. (can empty tank)
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