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My sand filter is losing pressure within a hour until it doesn't filter at all. what will cause this and better yet what is the solution

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If you have backwashed the filter and in one hour it is pluged again it maybe you need fresh sand. how long has your sand been used?

Posted on May 28, 2011

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Hayward s200 losing suction in filter mode


Based on your question, it appears you have a Hayward S200 sand filter with 6-position side mounted valve and a standard pump with a first stage basket with a Lexan sight cover. You indicate that 5 of the six valve positions appear to work properly, drawing water out of the skimmer line, through the valve, and into the appropriate output (such as waste, recycle, backwash, etc.), but that in the normal filter mode your pump runs but no water is drawn from the skimmer through the pump basket.

What you describe is a classic blockage downstream of the pump. First, check to verify any/all downstream valves are in open position. If the filter will operate in backwash mode, it is likely not a blockage within the filter. I suggest you disassemble the 6 position valve and check for any obstruction within the valve itself. Based on your description, it's possible the obstruction might be in the bottom line going to the filter. This line narrows as it approaches the valve, and in normal filter mode an obstruction in this line could log and clog the water path, but in backwash mode water flows away from the valve toward the filter in this line, away from narrow to larger diameter. It's a long shot.

Apr 04, 2013 | Hayward Industrial Products Hayward S200...

1 Answer

My new Optiflow pump surges..............it seems to not be pulling the water thru the sand filter and discharging as it should. Sand filter gauge fluxuates between 0 and 3 lbs of pressure.


it sounds like you may have a suction side leak on the pump. check the lid o-ring and the suction side fittings to see if there may be a possibility of air being sucked into the pump and causing it to act like it's picking up prime and then losing it.

Jul 25, 2011 | Pentair OptiFlo Aboveground Pool Pump 1 HP...

1 Answer

When vaccuming the pool, eventually the flow becomes minimal and we do a backwash, rinse and then back to filter; all the **** we just vaccumed blows back out into the pool. We put new sand in this year...


Your pool has about 7634 gallons. If you were a commercial pool, you would be looking for an 8 hour turn over rate, A 1.5 pump, rule of thumb, will move 50 gallons per minute. It appears from your picture that you have a 300 # sand filter. If this is the case, you have plenty of filter capacity. Your 1.5 hp pump should be moving 3000 gallons per hour and your turn over rate is about 2 1/2 hours. I think your pump is probably closer to 1/2 horse and your plumbing is probably closer to one inch. I am not sure the rule of thumb for this but would rationalize you are moving 800 gallons per hour through your 300 # sand filter giving you a rate of just under 8 hours.

Do a good back wash - then do a good 'rinse' with your multi-port valve - then if necessary, continue with the vacuum.

You shouldn't have to go through all of this - I think your filter is adequate providing you have actual pool sand in the filter, not play or beach sand, and it is loaded properly. You say you got the sand at your pool place, so I presume it is real pool sand. What does your pool supplier have to say about all of this???

Please let me know what is going on as you continue to enjoy and clean your pool.

Thanks for your interest in FixYa.com

Jul 10, 2011 | Hayward SAND FILTER, PRO SERIES

1 Answer

If I turn to back wash, will I lose sand. Should I use waste out to clean the filter


Backwash is meant to clean the sand and remove dirt from the filter.
Waste simply pumps the pool water to the drain line and doesn't clean the sand.
If the filter has its distributors, the sand should be held in the canister.
Gary

Jun 27, 2011 | Hayward SAND FILTER, PRO SERIES

1 Answer

I just ordered and received a 2500 filter, set it up, turned it on, and nothing....motor noise, but no water movement. What am I doing wrong? AS far as I know, I did what I was supposed to. ??? Pools...


1 - Double-check that your water level is above the hose that sends water from your pool to your filter. If the hose has even the tiniest crack, air could be getting sucked in & causing your filter to lose its prime.

2 - If you have not already done so, slowly twist the top of your filter house to loosen it (do this while your unit is on but keep a tight grip on it...once the water pressure hits it, it can push it off completely). You should hear air escaping from the unit. Once water begins coming out, tighten the top back down. Removing the air should 'prime' your filter.

3 - If you've tried this & it didn't work, try putting your filter on a level raised surface (possibly a chair or a sturdy box) at a level about equal to the hose that brings the water from your pool to your filter. Also, try putting it it as far away from your pool as your hoses will allow.

4 - If none of this works, it could be that you have a defective unit. Or, perhaps some other readers will have additional suggestions.

5 - Start saving up. As soon as you are able, purchase a Sand Filter & a Saltwater Chlorine Generator/Saltwater System. I don't know how big your pool is, but mine is 18' x 4' and holds approximately 6000 gallons. The first 3 years I had it, my children & I spent more time cleaning it than swimming in it - literally. (Once we'd shock it, we had to wait 24 hours to swim. By then, it needed a clarifier or ph + or - :-( ) My mom kept telling me that people she worked with had converted to saltwater & were just loving it. I thought that sounded like some sort of lengthy & expensive process & was leary. In the meantime, my sister-in-law was given a sand filter & she raved about what a great difference it made. I began checking online & ebay had the best prices (by far) on the sand filters, but they were still going for about $300 so I waited. My local Wal-Mart had the saltwater chlorinator for $199. It was hard for me to justify paying $500 to convert the pool (especially since I'd gotten the pool at Sam's for only $300 to begin with! Finally, though, I got so sick of having a pool we couldn't enjoy, I did it. I won an auction on a sand filter on ebay for right under $300 and a chlorinator fro $115. I got them in within a couple of days of one another & hooked them up. I got the sand at Lowe's for about $7 & the salt (also at Lowe's) for about $5. I put in the salt & stirred it around with the skimmer-pole. The directions said to wait about 24 hours for the salt to dissolve, but my pool was green & I was tired of waiting so after about 3 hours, I turned on the filter. I let it run for about 5 minutes then turned on & programmed the saltwater chlorinator to operate for 12 hours. That was about 5pm. By the next morning, the water was as clear as when I'd first filled it up. WooHoo!!! That was over 1 year ago & I've just now added my second 40lb bag of salt. Water is still clear - well worth the investment! The only thing I would recommend doing differently is the way I got the saltwater chlorinator. I recommend paying the little extra to get a new one. The one I got off ebay was great - but it only worked for one season. For no apparant reason, about a week ago, I found the power off & could not get it to power on. Wal-Mart has them for $169 this year. Don't know if you have Atwoods where you live, but I just got my new one there for $159. I didn't even hesitate this time...I knew it was more than worth it. No more filter cartriges, no more shock, no more clarifier, no more ph -, no more ph+, no more green water...just a lot more fun in the pool!
Just so you know, in case you do save up & go to sand & saltwater...the filter I got is a 2hp 22" tank. It either pumps 4000 or 5000 gallons per hour - I don't remember for sure which. I do remember, though, that whatever it is, it's 1000 gallons more per hour than the chlorinator specifies but they work GREAT together. I searched ebay for "2hp 22" sand filter" (not in quotes) to narrow down the search results. There are a couple different brands that mostly come up - Hayward & Clearwater, if I remember right. I got a Clearwater, but they probably work the same.
I know you're asking for advice about the filter you already have, so I apologize if the information I've offered is unwelcomed. I just wish I'd switched my pool years earlier than I did. I would have saved a ton of headache, hassle and, in the long run...money.

Jun 20, 2011 | Intex 2010 Easy Set 2500 Gph Swimming Pool...

1 Answer

Van does fine until you reach about 45 miles per hour and you get a jerking hesitation until you reach about 50 miles per hour and it stops. doesn't do it any other time.


You may want to do a basic tune up. Plugs, wires, cap&rotor, PCV, and don't forget the fuel filter. It is a forgoten, yet sometimes vital, part of a tune up. If you have already done this within a reasonable mileage, hit me up and we'll try to figure this thing out.

Jun 14, 2011 | Mercury Monterey Cars & Trucks

1 Answer

I have a swimpro sand filter it is 5 yrs old and this season when i started it up it doesn't seem to have very good pressure i have backwashed it three times and it wont even run my pool cleaner no...


If there is not much pressure, the problem is with the circulation system. Probably the pump.
When a sand bed gets old the pressure goes up on the guage, but the filter doesnt do much. When there is a lack of pressure, its due to a problem with the water flow. Usually a clogged impeller, strainer basket, or skimmer basket.

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.

Jun 02, 2011 | Hayward SAND FILTER, PRO SERIES

3 Answers

Pressure up past 15 or 20 shortly after


The sand is clogged and needs a backwash or change.

May 25, 2010 | Hayward Pro Series 18" Above Ground Pool...

1 Answer

Recommend backflush pressure of a hayward pool filter


After you have backwashed your filter until the site glass run clear. Go to rinse mode for 30 seconds. Make note of the filter pressure. Don't backwash until the pressure goes up 10 psi!! It is important not to backwash too much. As pressure climbs the sand filter actually filters better.

Aug 02, 2009 | Hayward SAND FILTER, PRO SERIES

1 Answer

Sand dollar sand filter has great pressure on backwash but has very low pressure on filter then after a short time does not have any pressure water does not move at all. I changed sand and cleaned...


Generally, if the filter loses pressure in the filter mode, you have an air leak somewhere. When the filter is low on pressure, check your pump basket area. If there is air in the basket, that is the problem. It could be a bad o-ring under the basket lid, or the air release on the valve, but it will need to be found. Check for drips around the equipment also.

May 16, 2009 | Pentair Sand Dollar 19" Filter with 1 Hp...

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