Installer said the O rings
"Installer said the O rings sent weren't the right size."
PuROTwist 4000 RO Filter Replacement Kit with 36 GPD Membrane
Q&As
PuROTwist 4000 RO Filter Replacement Kit with 36 GPD Membrane
Q&As
Part Number:
YSM-PURO4T36
Make filter changes simple with this complete PuROTwist 4000 RO replacement kit—everything you need in one box
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IN STOCK
Description
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 (Q5621) - 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.
This Item Fits These Select Systems
Replacements & Add Ons
Replacements for This Item
View All System Parts
Stage 2
Omnipure Q5633 Granular Carbon Filter GAC T33 2.5" x 12"
Replace Every 12 Months
See Details
Stage 3
Omnipure Q5672-36FC RO membrane 36 GPD with Flow Control
Replace Every 24 Months
See Details
Stage 4
Omnipure Q5633 Granular Carbon Filter GAC T33 2.5" x 12"
Replace Every 12 Months
See Details
Add Ons for This Item
Helpful Info & Downloads
Overall rating: 4.6363635 / 5 from 11 reviews.
AI Generated Review Summary
Summary topics
Review topics: ["service"].
Review highlights
Reviews
Installer said the O rings
"Installer said the O rings sent weren't the right size."
ESP water treatment
"The Purotwist ROfilter replacement kit from ESPwater comes com[plete with O-rings ready to install . Quick and easy service."
AAAAAA
"AAAAAA"
Filters work great , delivery
"Filters work great , delivery is fast. The only complaint i have is they should send new O Rings with the filters."
Customer support excels!
"Customer support is excellent. I called to troubleshoot and the customer support man was very knowledgeable, patient and well informed."
GREAT WE HAVE WELL WATER
"GREAT WE HAVE WELL WATER FROM A RIVER HERE IN BAJA CALIFORNIA AND AFTER THESE FILTERS AND THE ALL HOUSE FILTER WHE HAVE GOOD DRINKABLE WATER"
Thank you, Alex for your
"Thank you, Alex for your support and help!"
reverse osmosis
"so easy to install new cartridges."
It's fast and easy to
"It's fast and easy to install."
doug pruden
"great crew to work with, more helpful than the sales up here in Canada. Cost effective even with the dollar difference, going to add the 4 stage at the new farm. Thanks"
Q&A
Q:
What is included in the PuROTwist 4000 36 GPD kit?
A:
Q5605 sediment prefilter, Q5621 carbon prefilter, TQ56-36FC 36 GPD membrane, Q5633 GAC post-filter, and replacement head O-rings.
Q:
Which RO system does this kit fit?
A:
The catalog lists: PT4000 TFC 36 GPD. Confirm the exact model or part number on your equipment before ordering PuROTwist 4000 36 GPD kit.
Q:
Does this kit include the RO membrane?
A:
Yes. It includes the encapsulated 36 GPD membrane for a full replacement cycle.
Q:
How often should the filters be replaced?
A:
Prefilters and post-filters are commonly changed every 6 to 12 months. RO membranes commonly last about 24 months, although water quality and use can shorten either interval.
Q:
What should I verify before ordering?
A:
Match the system model, individual filter part numbers, membrane capacity, and connection style. Stage count alone does not establish compatibility.
Q:
What should I do after replacing the filters?
A:
Restore water slowly, inspect all housings and tubing for leaks, and flush according to the system instructions before using product water.
