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Thread: How to know when to replace filter housing? Top of filter "rising" when starting?

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    How to know when to replace filter housing? Top of filter "rising" when starting?

    I've recently noticed the top of my cartridge filter housing slightly "rising" when the filter pump turns on. Haven't paid attention to that before. Is that normal? OK? Does a new filter housing slightly expand when new? Or only when it is old, and time to replace? How long should a cartridge filter housing last? (Mine is about 8.5 years old.)
    Mike
    25k IG w/ Pebble Sheen +8' diameter spa w/spillway w/ Hayward ProLogic +T-CELL-15 SWCG
    Cartridge Filter and Gas Heater on Hayward Pump SPX3215X20Z1PE (w/ 2.00 HP, 1.10 SF motor)
    +separate waterfall on Hayward Pump SPX3210Z1PE (w/ 1.00 HP, 1.25 SF motor)

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    Mod Squad mknauss's Avatar
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    Re: How to know when to replace filter housing? Top of filter "rising" when starting?

    Can you give us a make and model of the filter? It should not move. I assume it does not leak?
    6000 Gallon IG Fiberglass with integrated Spa
    Pentair CCP240 Cartridge Filter with Pentair Intelliflow 3050VS Pump and Pentair HTR250 heater. IC40 SWG. EasyTouch 4. TF 100 Test Kit w/SpeedStir!
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    Marty

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    Re: How to know when to replace filter housing? Top of filter "rising" when starting?

    That's pretty normal but shouldn't be very much. The vessel flexes as pressure is applied. As far as the amount of rise, I don't think I've noticed more than 1/8", but certainly noticeable.

    Lifespan will depend on exposure. If it's in the blazing sun all day, it won't last as long as if it's in the shade. Hopefully someone more experienced than me will chime in about lifespan, but one of the pool filters I look after is around 25 years old. Filters in irrigation are usually kept inside, and I don't recall ever hearing about one of those wearing out. Getting hit by a forklift, yeh, but not wearing out!
    12k IG salt; glass beads in plaster; K-2006C, K-1766, CCL, and Aussie 4in1 (HTH); Pentair Eco800 1.2HP VS; Zodiac SWC 1.3 lb/day (25 g/hr); 25" filter recycled glass; OKU solar panels; 1/2 HP solar pump; Rebel (Warrior) pool cleaner; FlowViz; prior pool AG 10k | Read Before Posting to get the best possible advice | ... and this helped me a lot!: TFPC for Beginners

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    Re: How to know when to replace filter housing? Top of filter "rising" when starting?

    All filters expand when pressure is applied. It shouldn't be excessive.

    Make sure that you're not putting more flow or pressure through the filter than it's rated for.

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    Re: How to know when to replace filter housing? Top of filter "rising" when starting?

    Quote Originally Posted by mknauss View Post
    Can you give us a make and model of the filter? It should not move. I assume it does not leak?
    It's not leaking, just the whole top is slightly bulging when turning on:
    pool filter label.jpgpool filter.jpg
    Mike
    25k IG w/ Pebble Sheen +8' diameter spa w/spillway w/ Hayward ProLogic +T-CELL-15 SWCG
    Cartridge Filter and Gas Heater on Hayward Pump SPX3215X20Z1PE (w/ 2.00 HP, 1.10 SF motor)
    +separate waterfall on Hayward Pump SPX3210Z1PE (w/ 1.00 HP, 1.25 SF motor)

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    Mod Squad mknauss's Avatar
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    Re: How to know when to replace filter housing? Top of filter "rising" when starting?

    A slight bulging but no movement at the clamp and gasket is ok. I was concerned the clamp might be loose.

    Do you backwash when your pressure rises 20-25% over clean pressure?
    6000 Gallon IG Fiberglass with integrated Spa
    Pentair CCP240 Cartridge Filter with Pentair Intelliflow 3050VS Pump and Pentair HTR250 heater. IC40 SWG. EasyTouch 4. TF 100 Test Kit w/SpeedStir!
    CLICK HERE to Become a TroubleFreePool.com Supporter!!
    Marty

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    Re: How to know when to replace filter housing? Top of filter "rising" when starting?

    That filter is equipped with “auto” air relief, check performance & after start up the manual relief should purge no air.
    Best to dissemble tank for inspection. Typical swelling moves up & width wise. If it is pronounced in on direction, usually upward then Have the tank professionally qualified.
    Also tank looks “chalky” if you can scratch it with fingernail or light implement- replace. & treat new tank with a UV inhibiting spray

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    Re: How to know when to replace filter housing? Top of filter "rising" when starting?

    That's a manual air relief. Hayward stopped making the automatic air relief.

    There's an internal air relief on the manifold.

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    Re: How to know when to replace filter housing? Top of filter "rising" when starting?

    I was not aware of that that. I thought the auto diaphragm was underneath the manual valve & shared a housing.
    Thank you- JamesW



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    Re: How to know when to replace filter housing? Top of filter "rising" when starting?

    Cant edit posts today??

    Since they are identical appearance, age of tank would answer that question?
    DEX2420MAR- old style w auto & manual lever

    Thank you again JamesW, I appreciate the information.



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    Re: How to know when to replace filter housing? Top of filter "rising" when starting?

    The automatic one looks different. The one in the picture is manual only.

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    Re: How to know when to replace filter housing? Top of filter "rising" when starting?

    The automatic air relief looks like the one in the below link. Flat on top with the smaller manual air relief on the side.

    Hayward DE3620 Pro-Grid Vertical D.E. Filter, 36 Sq. Ft.

    The Hayward Automatic Air Relief Assembly part number is DEX2420AR.

    The DEX2420AR was discontinued and replaced with part number DEX2420MAR, which was discontinued and replaced with part number DEX2420MAR2.

    "MAR" stands for manual air relief.

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    Re: How to know when to replace filter housing? Top of filter "rising" when starting?

    Quote Originally Posted by mknauss View Post
    A slight bulging but no movement at the clamp and gasket is ok. I was concerned the clamp might be loose.

    Do you backwash when your pressure rises 20-25% over clean pressure?
    I'm not familiar with how/when to "backwash" a cartridge filter... Could you elaborate? Thank you,

    - - - Updated - - -

    Quote Originally Posted by PoolguyinCT View Post
    That filter is equipped with “auto” air relief, check performance & after start up the manual relief should purge no air.
    Best to dissemble tank for inspection. Typical swelling moves up & width wise. If it is pronounced in on direction, usually upward then Have the tank professionally qualified.
    Also tank looks “chalky” if you can scratch it with fingernail or light implement- replace. & treat new tank with a UV inhibiting spray
    Can I just replace the top half, or should I replace the whole housing/tank? Thank you,
    Mike
    25k IG w/ Pebble Sheen +8' diameter spa w/spillway w/ Hayward ProLogic +T-CELL-15 SWCG
    Cartridge Filter and Gas Heater on Hayward Pump SPX3215X20Z1PE (w/ 2.00 HP, 1.10 SF motor)
    +separate waterfall on Hayward Pump SPX3210Z1PE (w/ 1.00 HP, 1.25 SF motor)

  14. Back To Top    #14

    Re: How to know when to replace filter housing? Top of filter "rising" when starting?

    What pump do you have?

    What does the pressure gauge go up to when the pump is first turned on and what pressure does it settle at?

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    Re: How to know when to replace filter housing? Top of filter "rising" when starting?

    And here's a short video showing how much it expands/rises:
    pool filter - YouTube
    Mike
    25k IG w/ Pebble Sheen +8' diameter spa w/spillway w/ Hayward ProLogic +T-CELL-15 SWCG
    Cartridge Filter and Gas Heater on Hayward Pump SPX3215X20Z1PE (w/ 2.00 HP, 1.10 SF motor)
    +separate waterfall on Hayward Pump SPX3210Z1PE (w/ 1.00 HP, 1.25 SF motor)

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    Re: How to know when to replace filter housing? Top of filter "rising" when starting?

    Quote Originally Posted by Westovers View Post
    I'm not familiar with how/when to "backwash" a cartridge filter... Could you elaborate? Thank you,

    - - - Updated - - -



    Can I just replace the top half, or should I replace the whole housing/tank? Thank you,
    Halves are available but quite pricey for what you get & the significant other has the same miles on it.

    I’m from the “one & done” school. I’d wouldn’t contract a “half” replacement or do one at my own house.



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    Re: How to know when to replace filter housing? Top of filter "rising" when starting?



    This is a private label tank by same manufacturer, which was also “growing” considerably.

    Pump isn’t sounding too keen either.
    Where do you live, I’m jealous it’s 8 degrees here.
    Ray




  18. Back To Top    #18

    Re: How to know when to replace filter housing? Top of filter "rising" when starting?

    All filters expand some when pressurised. It's hard to tell if there's anything wrong with yours.

    Your pressure is higher than ideal. You could probably downsize the impeller by half and be fine.

    Excessive pressure will shorten the life of the filter and greatly increase the risk of failure.

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    Mod Squad zea3's Avatar
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    Re: How to know when to replace filter housing? Top of filter "rising" when starting?

    Quote Originally Posted by Westovers View Post
    I'm not familiar with how/when to "backwash" a cartridge filter... Could you elaborate? Thank you,
    You cannot backwash a cartridge filter. I'm sure mknauss meant to ask how high the pressure rises when before you clean the cartridges. Do you know what the clean filter pressure is?
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    Re: How to know when to replace filter housing? Top of filter "rising" when starting?

    Quote Originally Posted by Westovers View Post
    I'm not familiar with how/when to "backwash" a cartridge filter... Could you elaborate? Thank you
    I am sorry. I skipped in my head it was a cartridge filter. Do you clean your cartridges when the pressure rises by 20-25% over clean pressure?

    Take care
    6000 Gallon IG Fiberglass with integrated Spa
    Pentair CCP240 Cartridge Filter with Pentair Intelliflow 3050VS Pump and Pentair HTR250 heater. IC40 SWG. EasyTouch 4. TF 100 Test Kit w/SpeedStir!
    CLICK HERE to Become a TroubleFreePool.com Supporter!!
    Marty

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