SKU: 25501703853

PuROTwist 4000 RO Filter Replacement Kit with 36 GPD Membrane

Sale price$140.11 Regular price$155.68
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Ships within 48 hours · Estimated delivery Sep 19 - Sep 24

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Description

PuROTwist 4000 RO Filter Replacement Kit with 36 GPD MembraneFilter Replacement Kit for PuROTwist 4000 with 36 GPD TFC Reverse Osmosis Membrane and FREE Replacement O Rings INCLUDES: STAGE 1 1x Sediment Pre Filter (Q5605) Replace every 6 12 months or as needed STAGE 2 1x Carbon GAC Pre Filter (Q5633) Replace every 6 12 months or as needed STAGE 3 1x RO Membrane TFC 36 GPD (TQ56 36FC) Replace every 24 months STAGE 4 1x Carbon GAC Post Filter (Q5633) Replace every 6 12 months or as needed O RINGS FREE Replacement

Filter Replacement Kit for PuROTwist 4000 with 36 GPD TFC Reverse Osmosis Membrane and FREE Replacement O-Rings

INCLUDES:

  • STAGE 1 - 1x Sediment Pre-Filter (Q5605) - Replace every 6-12 months or as needed
  • STAGE 2 - 1x Carbon GAC Pre-Filter (Q5633) - Replace every 6-12 months or as needed
  • STAGE 3 - 1x RO Membrane TFC 36 GPD (TQ56-36FC) - Replace every 24 months
  • STAGE 4 - 1x Carbon GAC Post Filter (Q5633) - Replace every 6-12 months or as needed
  • O-RINGS - FREE Replacement O-rings for Filter Heads (4x H-118 and 4x H-011)

We offer two replacement filter kits so you can get exactly what you need — and avoid paying for filters you don’t.

  • Year 1 Kit found on this page (Includes RO Membrane):
    Ideal for your first full replacement, this kit includes all filters plus the RO membrane, which typically lasts up to 24 months.

  • Year 2 Kit (Without RO Membrane):
    After the first year, you only need to replace the pre- and post-filters, since the RO membrane is still good for another year. This kit helps you save money while keeping your system performing like new.

*Filters may need to be replaced more often than indicated, depending on water contaminant levels and volume of water being treated.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 25501703853

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4.0 ★★★★★
Based on 25 reviews
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A
Verified Purchase
Amazing Sally
Fort Morgan, US
★★★★★ 5
so far so good
I was surprised at this pair of pillow cases only because the material seemed impossible to be cooling - it's that weird polyester blend. So far I have not awoken feeling sweaty around my face and scalp. I don't recall what I originally paid but I think it is great value for money! If you are sensitive to out of the box smell, I washed mine first and it didn't impede on the efficacy of the cooling!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 28, 2026
D
Verified Purchase
Devin Hill
Lowell, US
★★★★★ 5
It’s like sleeping on a beach in San Vito lo Capo
Italian voice: I’m a big meaty fella so I put off a lot of heat ya hear. These pillow cases have changed my life. One moment they’re hot and the next you flip them and you’re blasted with a blast of ice cool what it feels like to chew 5 gum feeling capeesh. I would reccomend these pillow cases to even my grandma. If ya wanta get a rest so good that it feels like ya been sleeping with the fishes get these pillow cases, they’re the real deal. Then stop at Pauline’s joint and grab a slice of pizza say Vinnie sent ya. Anyways I gotta go my wife’s cooking up a mean lasgna and we’re gonna watch the dodgers. Let me know how these treat ya I guarantee they will change your life. Vinnie out
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Reviewed in the United States on February 15, 2026
A
Verified Purchase
Amazon Customer
Carnegie, US
★★★★★ 4
Soft "cooling" case.
Yes it is very cool when you lay on it. It doesn't stay cold though. Within a minute or 2 to whatever your temp is.
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Reviewed in the United States on December 25, 2025
C
Verified Purchase
CountryGal
Battle Creek, US
★★★★★ 5
Great for hair and skin. Great buy.
These pillow cases are great for my hair and skin. They look good, hold up well in the washer and dryer, and the price is great. They are cooling. Of course I wish they could be more cooling, but honestly I'm not sure that's even possible. Great pillow cases. Already bought more for other heads. Would buy again.
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Reviewed in the United States on March 11, 2026
M
Verified Purchase
Melissa
Phoenix, US
★★★★★ 1
Hot hot hot. Side sleepers will hate it
At first touch, these are the coldest pillowcases I own … but only for seconds. Once you actually lay on them, within seconds they adjust to your body temp, the heat feels trapped, my head begins to feel hotter than before I laid down - which has in turn caused me loathe these pillow cases. I hate that I have missed the return window. Would never buy again, would never recommend. My satin ones aren’t even this hot! I gave them the good ole 30-day try. Side sleepers - if you are like me and sleep on your side with arm tucked under pillow - flipping this pillow over in hopes of a cold side - forget it, it’s already hot from your arm.
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Reviewed in the United States on August 29, 2025

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