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Thread: New Pool Low PSI on Filter

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    New Pool Low PSI on Filter

    Hi I am a new pool owner of which this is my first pool ever and i have been having it now for about 2 months. I have a Jandy JEP2.0 Variable speed filter pump and I am currently running my 25,000 gallon pool 11hrs 20mins a day at 1750rpm and 40mins a day at 3000rpm (When Cleaner is On). When I run my pump at 1750rpm my cartridge filter gauge reads 0 psi. Is this correct or should i be seeing some type of resistance reading from that gauge? When i put it on 2450rpm it reads 10spi and when i put it on 3450 (Max) it reads 20psi. Everything seems to be working fine but is it normal to have 0psi reading on 1750rpm and is it effectively filtering?
    Nov 2014 - 25,000 IG Freeform 3.5'-7' w/ 18" Spa, 7 Ton Rock Waterfall, Bordeaux PebbleSheen, UV & Corona Discharge Ozone, HC-3315 Chlorinator, Jandy CV580 Cartridge Filter, Jandy LXI 400K Heater, Polaris 280 Cleaner, Jandy LED Pool2 & Spa1, AquaLink PDA
    Jandy JEP2.0VS (Filter), Jandy SHPM2.5 (Spa), Jandy FHPM1.5 (Waterfall), Polaris PB4-60 (Booster) - 2006C

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    bobodaclown's Avatar
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    Re: New Pool Low PSI on Filter

    Yes, that is typical behavior. With the pump off it is returning to 0 correct?
    What is your filter pressure when the pump is on Max and the cartridges are clean?
    17K Kidney Shaped Pool Concrete (Diamond Bright) Pool, 3/4 hp 2 speed 115V Sta-rite Duraglas PEA5D-180L/P2R5D-181L (Impeller C105-92PS Diffuser C1-216P), 1.5 piping, Pentair CC100 Filter , Heat Siphon 100K BTU Heat Pump Pool Heater, Flow meter Blue White Flowmeter Model No. F-30150P, Hayward Astrolight SP0581N, SWCG CalimarTitanium Edition TE45 , Dolphin Nautilus Plus with CleverClean, Lakeland Florida

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    Re: New Pool Low PSI on Filter

    Quote Originally Posted by bobodaclown View Post
    Yes, that is typical behavior. With the pump off it is returning to 0 correct?
    What is your filter pressure when the pump is on Max and the cartridges are clean?
    Yes when the pump shuts off it returns to zero. With the cartridges clean and the pump on Max 3450rpm the pressure is about 20psi. Again the pool is new and we have only been in the spa twice and it was this past weekend. Do you see anything wrong with running the pump at what I consider a slow rpm 1750 for 11hrs with the pressure gauge reading zero?
    Nov 2014 - 25,000 IG Freeform 3.5'-7' w/ 18" Spa, 7 Ton Rock Waterfall, Bordeaux PebbleSheen, UV & Corona Discharge Ozone, HC-3315 Chlorinator, Jandy CV580 Cartridge Filter, Jandy LXI 400K Heater, Polaris 280 Cleaner, Jandy LED Pool2 & Spa1, AquaLink PDA
    Jandy JEP2.0VS (Filter), Jandy SHPM2.5 (Spa), Jandy FHPM1.5 (Waterfall), Polaris PB4-60 (Booster) - 2006C

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    bobodaclown's Avatar
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    Re: New Pool Low PSI on Filter

    No problem at all.

    17K Kidney Shaped Pool Concrete (Diamond Bright) Pool, 3/4 hp 2 speed 115V Sta-rite Duraglas PEA5D-180L/P2R5D-181L (Impeller C105-92PS Diffuser C1-216P), 1.5 piping, Pentair CC100 Filter , Heat Siphon 100K BTU Heat Pump Pool Heater, Flow meter Blue White Flowmeter Model No. F-30150P, Hayward Astrolight SP0581N, SWCG CalimarTitanium Edition TE45 , Dolphin Nautilus Plus with CleverClean, Lakeland Florida

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    JasonLion's Avatar
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    Re: New Pool Low PSI on Filter

    Yes, all normal. Pressure gauges don't read low psi very well, and tend to report it as zero when it is 1 or 2 or sometimes a bit higher. Lower pressure at lower speeds is completely normal.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    Richard320's Avatar
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    Re: New Pool Low PSI on Filter

    Welcome! There's nothing wrong with your filter. I suspect you're running the pump too long. Even in summertime, my pool does fine with four hours a day, and most people discover they can do with a lot less than they thought. There's an article in Pool School about it.

    What is worrisome is all this stuff in your signature: "UV & Corona Discharge Ozone, HC-3315 Chlorinator". UV & Ozone are not usually needed for an outdoors residential pool. And that chlorinator uses trichlor pucks. Every puck you add raises your CYA level about 1.3 PPM. In a pool your size, with a low 2 ppm FC loss per day, you'll use about a puck a day. So in a week, you'll have raised CYA 9 PPM. Every week. It won't take long before it gets high enough to become a real problem.

    Have you checked out http://www.troublefreepool.com/conte...ater-chemistry or http://www.troublefreepool.com/conte...nate-your-pool ??
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    pwrstrk's Avatar
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    New Pool Low PSI on Filter

    Just one little thing to add in case you didn't already know, is clean your filter when the pressure rises 25% above the clean pressure. You take that pressure reading with your pump cranked all the way up.
    Jeff
    24'x54" AG Morada RTR (by wilbar) 13'500 gal. Hayward Powerflo Matrix 1hp 2 speed. Hayward Perflex EC65 DE filter.

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    Re: New Pool Low PSI on Filter

    Quote Originally Posted by Richard320 View Post
    Welcome! There's nothing wrong with your filter. I suspect you're running the pump too long. Even in summertime, my pool does fine with four hours a day, and most people discover they can do with a lot less than they thought. There's an article in Pool School about it.

    What is worrisome is all this stuff in your signature: "UV & Corona Discharge Ozone, HC-3315 Chlorinator". UV & Ozone are not usually needed for an outdoors residential pool. And that chlorinator uses trichlor pucks. Every puck you add raises your CYA level about 1.3 PPM. In a pool your size, with a low 2 ppm FC loss per day, you'll use about a puck a day. So in a week, you'll have raised CYA 9 PPM. Every week. It won't take long before it gets high enough to become a real problem.

    Have you checked out http://www.troublefreepool.com/conte...ater-chemistry or http://www.troublefreepool.com/conte...nate-your-pool ??

    Thanks for the feedback as I am learning alot from this site but like I mentioned I am a first time pool owner and will probably stumble here or there till I get completely comfortable with everything but y'all's advice is very helpful. I may try to scale back the hours I am running my pool and possibly raise it during the summer when the pool gets some use. I went with a chlorinator due to pure convenience. I didn't realize each 3" puck would add 1.2ppm of CYA. I understand you can put bleach or pool chlorine in your pool to add chlorine and it won't mess with any of your other levels. Is 12% typically the strongest you can get?
    Nov 2014 - 25,000 IG Freeform 3.5'-7' w/ 18" Spa, 7 Ton Rock Waterfall, Bordeaux PebbleSheen, UV & Corona Discharge Ozone, HC-3315 Chlorinator, Jandy CV580 Cartridge Filter, Jandy LXI 400K Heater, Polaris 280 Cleaner, Jandy LED Pool2 & Spa1, AquaLink PDA
    Jandy JEP2.0VS (Filter), Jandy SHPM2.5 (Spa), Jandy FHPM1.5 (Waterfall), Polaris PB4-60 (Booster) - 2006C

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    BoDarville's Avatar
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    Re: New Pool Low PSI on Filter

    Quote Originally Posted by Calleblanc77
    Is 12% [bleach] typically the strongest you can get?
    Yes, this is about the high end, at least from what I've seen.

    Since I see you have a spa, I'll pass along another consideration resulting from the regular use of pucks. If the spa's check valve is in the return flow and is close to the in-line chlorinator, it is getting a highly concentrated dose of chlorine passing through it. As a result, it will be subject to early failure. The most common telltale sign that your check valve is compromised is when the water level in the spa drops noticeably when the pump is off. The previous owner of our house was a regular puck user and would routinely place 6-8 pucks in the feeder. When we bought the house (prior to me switching to the TFP method), I continued using the pucks but cut it down to between 3 and 6 pucks placed in the feeder depending on the time of year. Not only did I wind up with high CYA, I was replacing check valves more frequently. Once I switched to TFP and used bleach by pouring it in front of a return jet with the pump on, both problems were solved.
    Gold Supporter, TFP Lifetime Supporter, 26,680 gal Plaster IGP 3.5 - 10' depth / Attached Waterfall Spa, Manually Chlorinated, Triton Sand Filter, 1.5 HP * 1.1 SF = 1.65 SFHP 1-speed Pentair WhisperFlo WF-26 Pump, 400K BTU NG Teledyne Laars Series One Heater, Polaris 360, Test Kit Comparison, Chlorine/CYA Chart, SLAMing Your Pool, OCLT
    A good test kit is an investment, not an expense.

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    Re: New Pool Low PSI on Filter

    Quote Originally Posted by BoDarville View Post
    Yes, this is about the high end, at least from what I've seen.

    Since I see you have a spa, I'll pass along another consideration resulting from the regular use of pucks. If the spa's check valve is in the return flow and is close to the in-line chlorinator, it is getting a highly concentrated dose of chlorine passing through it. As a result, it will be subject to early failure. The most common telltale sign that your check valve is compromised is when the water level in the spa drops noticeably when the pump is off. The previous owner of our house was a regular puck user and would routinely place 6-8 pucks in the feeder. When we bought the house (prior to me switching to the TFP method), I continued using the pucks but cut it down to between 3 and 6 pucks placed in the feeder depending on the time of year. Not only did I wind up with high CYA, I was replacing check valves more frequently. Once I switched to TFP and used bleach by pouring it in front of a return jet with the pump on, both problems were solved.
    I was aware of the check valve issue. The pool builder just had to change mine out as the original one installed never held. He changed it out and it started holding. Your pool is about the same gallon size as mine. How much does one gallon of 12% bleach or chlorine raise your chlorine level? The manufacturer of the uv/ozone system says to try to run .5-1ppm chlorine when running the system. From what I understand it is hard to keep that little chlorine in the pool during the summer. My chlorinator goes from 1-5 and now I have been running it on 1 (low) with 1-2 pucks and it has been keeping the CL at under 2ppm, but it is winter and no one is using the pool.
    Nov 2014 - 25,000 IG Freeform 3.5'-7' w/ 18" Spa, 7 Ton Rock Waterfall, Bordeaux PebbleSheen, UV & Corona Discharge Ozone, HC-3315 Chlorinator, Jandy CV580 Cartridge Filter, Jandy LXI 400K Heater, Polaris 280 Cleaner, Jandy LED Pool2 & Spa1, AquaLink PDA
    Jandy JEP2.0VS (Filter), Jandy SHPM2.5 (Spa), Jandy FHPM1.5 (Waterfall), Polaris PB4-60 (Booster) - 2006C

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    BoDarville's Avatar
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    Re: New Pool Low PSI on Filter

    Quote Originally Posted by Calleblanc77
    How much does one gallon of 12% bleach or chlorine raise your chlorine level?
    I have not found 12% bleach in the DFW area. When purchasing bleach, I would focus more on its freshness than the % concentration. The higher the concentration, the quicker it loses its potency, especially when it is subjected to heat. I have found 10% bleach at home improvement stores, but it must have been sitting around for a while as testing revealed that it was more like 6%. Therefore, I use 8.25% bleach purchased from grocery stores or warehouse clubs where rapid product turnover is much more likely.

    If you want to see how much a specific dose of 12% bleach raises the chlorine level, you could use the PoolMath tool (http://www.troublefreepool.com/calc.html). One gallon of 8.25% bleach in my pool will raise the chlorine level by ~ 3.2 ppm

    I cannot speak to the UV/Ozone system since I have no experience with it. I can, however, tell you that we recommend dosing chlorine at a level according the the CYA level of your pool as shown in the Chlorine CYA Chart
    Gold Supporter, TFP Lifetime Supporter, 26,680 gal Plaster IGP 3.5 - 10' depth / Attached Waterfall Spa, Manually Chlorinated, Triton Sand Filter, 1.5 HP * 1.1 SF = 1.65 SFHP 1-speed Pentair WhisperFlo WF-26 Pump, 400K BTU NG Teledyne Laars Series One Heater, Polaris 360, Test Kit Comparison, Chlorine/CYA Chart, SLAMing Your Pool, OCLT
    A good test kit is an investment, not an expense.

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