Very satisfied
"The fact that we have been with your company so many years, from the beginning of the company I believe, is an indication of our satisfaction."
PuROTwist 4000 RO Replacement Filter Kit - Membrane Sold Separately
Q&As
PuROTwist 4000 RO Replacement Filter Kit - Membrane Sold Separately
Q&As
Part Number:
YS-PURO4T50
RO filter replacement kit for PuROTwist 4000, reverse osmosis membrane not included
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IN STOCK
Description
Filter Replacement Kit for PuROTwist 4000 Reverse Osmosis System (RO Membrane Sold Separately)
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 - 0x (RO Membrane TQ56-50FC Sold Separately or with Replacement Kits YSM-PURO4T50) - Replace every 24 months
- STAGE 4 - 1x Carbon GAC Post Filter (Q5633) - Replace every 6-12 months or as needed
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 (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 found on this page (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 Q5672-50FC RO membrane 50 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: 4.9545455 / 5 from 22 reviews.
AI Generated Review Summary
Summary topics
Review topics: ["shipping","price","order","service","filters","replacement"].
Review highlights
Reviews
Very satisfied
"The fact that we have been with your company so many years, from the beginning of the company I believe, is an indication of our satisfaction."
Good product
"Very good product which is easy to install. The price is right."
easy
"Easy to order and change"
Reverse Osmosis the easy way
"I’ve had my system for quite a number of years. Replacing filters is easy and the customer service team is always a phone call away if o need assistance. I highly recommend the RO system and esp Water Products!"
Return Customer
"Been buying these products for 5 years. Good price and great customer service. Highly recommend!"
Best in the Industry
"ESP have supplied me years of support. Their service is second to none"
easy replacement
"With help frm staff at ESP, I am assured I am ordering the correct filter set. Staff is always patients with my questions and I appreciate their knowledge and expertise. Products come in very timely order and well packaged in sturdy box."
Great customer support
"Questions are always answered by support staff. Never an issue . Staff will talk you through anything from installing a new system to replacing the filters. Emails remind me when I have to change filters. Water quality is outstanding with the reverse osmosis system."
Easy peezy
"Took less than 10 minutes to change three filters. Filters are 1/4 of the price that I used to pay for my old triple osmosis unit"
I like the PuRoTwist 4000
"I like the PuRoTwist 4000 RO. It’s easy to use and to change the filters."
Q&A
Q:
What is included in the PuROTwist 4000 kit YS-PURO4T50?
A:
The annual prefilter and post-filter set for a compatible PuROTwist 4000 system.
Q:
Which RO system does this kit fit?
A:
The catalog lists these compatible parts or systems: PT4000 TFC 50 GPD. Confirm the exact model number on your equipment before ordering PuROTwist 4000 kit YS-PURO4T50.
Q:
Does this kit include the RO membrane?
A:
No. The 50 GPD membrane is sold separately, making this kit suitable when the existing membrane still passes performance checks.
Q:
How often should the filters be replaced?
A:
Prefilters and post-filters are commonly changed every 6 to 12 months. Membranes commonly last about 24 months, but 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, check all housings and tubing for leaks, and flush according to the system instructions before using product water.
