Ultra-Pure RO+DI Water
Lab-grade water for car detailing – spotless shine, zero residue, 100% pure performance.
PurePro® AW-400X Ultra-Pure RO+DI Water System — Frequently Asked Questions (FAQ)
1. What makes the PurePro® AW-400X different from other RO systems?
The AW-400X is a professional-grade ultra-pure water system specifically engineered for automotive and professional detailing industries.
It guarantees spot-free, scratch-free rinsing, protecting ceramic coatings, paint protection films (PPF), and luxury automotive finishes.
2. What water quality can I expect from the AW-400X?
The AW-400X consistently produces ultra-pure water at 0 ppm TDS, ensuring a flawless, spotless drying result without leaving any mineral residue.
3. Is it true that washing a car at night with your ultra-pure water system leaves no spots and requires no towel drying?
Yes, absolutely.
The AW-400X produces zero TDS water, allowing vehicles to air-dry perfectly without towel wiping — no water spots, no swirl marks.
4. What is RO (Reverse Osmosis) technology?
Reverse Osmosis (RO) forces water through a semi-permeable membrane, removing 95%–99% of dissolved solids, minerals, and contaminants.
Learn more here: Wikipedia - Reverse Osmosis
5. How durable is the AW-400X system?
The AW-400X is constructed with high-quality, commercial-grade components to ensure exceptional reliability and long-term performance, suitable for both residential and professional use.
6. Does the AW-400X require electricity to operate?
Yes. The AW-400X includes a high-flow RO pump, enabling pure water production even under low inlet water pressure.
Typical performance examples:
*Fill a 20-gallon pressure tank in approximately 30 minutes.
*Fill a 28-gallon pressure tank in about 50 minutes.
Multiple pressure tanks can also be connected in parallel.
7. How many pressure storage tanks can I connect to the AW-400X?
We recommend connecting up to five 28-gallon pressure tanks for optimal performance with the AW-400X’s 400 GPD capacity.
8. Can the AW-400X support electric pressure washers?
Yes! We recommend installing a 1/4 HP booster pump after the pressure tanks to ensure strong water pressure for electric pressure washers.
9. Can the AW-400X work with battery-powered portable pressure washers?
Yes, as long as the pressure washer supports self-priming (suction) capability, it can be used seamlessly with AW-400X pressure tanks. ( *Top 5 Best Cordless Pressure Washers 2025)
10. Is the AW-400X easy to install?
Yes. The AW-400X features a compact, wall-mounted design.
Basic plumbing skills are sufficient, and we provide detailed installation manuals and technical support.
11. If there is a power outage, can the pressure tanks still supply water?
Yes. Our pre-charged pressure tanks can continue delivering pure water even during a power outage.
Additionally, the optional M2 Emergency Drinking Water Kit allows instant conversion into a safe drinking water system during emergencies.
12. How often should I replace the filters?
Typical recommendations:
*Pre-filters (Sediment + Carbon): Every 3 months for standard users.
*DI resin filter: Every month, or after producing 1000–3000 liters of ultra-pure water.
*RO membrane: Every 1–2 years, depending on usage and water quality.
13. How do I know when to replace the DI filter?
Use a handheld TDS meter to monitor output water quality.
We recommend replacing the DI cartridge when TDS exceeds 10 ppm to maintain optimal ultra-pure performance.
14. Where can I order replacement filters?
You can order from our official online store or through authorized local distributors.
15. Can the AW-400X be used for applications beyond car washing?
Absolutely! The AW-400X is also ideal for:
*Solar panel cleaning
*Window cleaning
*Marine and yacht washing
*Motorcycle detailing
*Emergency pure drinking water (with M2 Kit)
*Ordering, Distribution, and Marketing Support
16. Can you ship the AW-400X to Australia?
Yes! We ship securely via DHL, and we already serve many Australian customers through our online store.
17. I am based in Japan and want to become a distributor. What is the minimum order quantity?
PurePro® brand resale: MOQ is 10 units.
Private label branding: MOQ is 100 units, including customized cartons and labeling.
18. Can I order your large posters and floor-standing banners?
Yes! We are currently offering a free large poster and floor-standing banner with every AW-400X order placed before the end of the month. Additional promotional materials can also be purchased separately.
19. I operate a car detailing and ceramic coating shop. Can I get a full installation manual?
Thank you for your interest!
You can download the manual (AW-400X User's Manual) from our website or simply leave us your email address, and we will send it promptly.
20. I love your American-style posters. Can I download and use them?
Of course!
We encourage all PurePro® customers and distributors to freely download and use our official marketing materials.
21. How does PurePro® AW-400X compare with systems like APEC CWS-300 Spot Free Rinse Water System?
Unlike dual-stage DI-only systems like APEC CWS-300, the AW-400X uses a six-stage RO+DI process. Our RO membrane removes 95%–99% of TDS before reaching the DI stage, greatly extending DI resin life and reducing operational costs.
*Result:
PurePro® customers save significantly on replacement costs while achieving true ultra-pure, zero TDS water every time.
22. Why is the PurePro® system more cost-efficient than DI-only systems?
Because RO pre-filtration removes the majority of contaminants, the DI resin only needs to polish remaining trace minerals.
This dramatically lowers DI filter replacement frequency and overall maintenance costs compared to DI-only setups.
23. What TDS level is considered "spot-free" for car washing?
In general, any TDS below 20 ppm is considered spot-free for car detailing.
The AW-400X system consistently delivers 0 ppm output, ensuring absolutely no water spots — even without towel drying.
24. Can I achieve spot-free results without replacing DI filters often?
Yes! If your incoming tap water is under 500 ppm TDS (typical for most cities), the PurePro® AW-400X’s RO membrane alone can reduce TDS below 20 ppm — even without needing immediate DI filter replacement.
25. How effective is the RO membrane in the AW-400X?
The RO membrane used in the AW-400X has a typical rejection rate of 95% or higher.
This high rejection rate means you need far fewer DI filter replacements compared to systems that rely solely on DI filtration.
PurePro® USA — Setting the Global Standard for Ultra-Pure Automotive Water Systems.
The Time Is Now: Act Today, Detail Like Never Before
The benefits of the PurePro® AW-400X are undeniable:
Shine: Transform every rinse into a spot-free,
swirl-free masterpiece—perfect for ceramic-coated and luxury
vehicles.
Business Growth: Offer premium detailing results
that clients will notice, remember, and return for.
Legacy: Be the professional known for delivering
lab-grade perfection in every wash.
The Ultimate Spot-Free Rinse for Coated & Luxury Car
To boost your sales, we offer optional marketing posters — large commercial and standing banners — available for purchase. OEM custom designs are also available to match your brand.
👉
Order Samples Now | 👉
Become a Distributor | 👉
Learn More
Technical
Specifications -
Model: PurePro AW-400X
Production Rate: 400 GPD / 1,512 LPD
Minimum Pressure: 10 psi
Voltage: 110V / 220V / 240V (50 / 60 Hz)
Dimensions: 38 × 46 × 25.5 cm
Weight: 13.8 kg.
Download Product Catalog (PDF)
Download Full Application Guide (PDF)
Distributors & Retailers: Why You Need the AW-400X
PurePro AW-400X solves one of the most common problems in the
detailing industry: water spots and coating failure caused by impure
rinse water.
Learn more about the benefits of ultra-pure water here.
With the global rise in demand for ceramic coating and PPF (paint
protection film), professional-grade rinse systems are no longer
optional — they’re essential.
Discover how the AW-400X could save your life in a crisis.
-
14G-40G Pressure Tank
Find the right tank for your needs.
VIEW DETAIL
Learn how to optimize your AW-400X system with different pressure tank setups for home, studio, or commercial use.
-
OEM & Private Label
Build your brand with PurePro.
VIEW DETAIL
Use our ready-made templates, marketing content, and multilingual materials to launch your own version of the AW-400X.
-
Color Packaging Design
Custom-branded boxes and visuals.
VIEW DETAIL
We offer premium full-color packaging designs for AW-400X. OEM clients can apply their own brand for a retail-ready look.
-
Product Promotion Poster
All product information in one place.
VIEW DETAIL
View the full product brochure online or download the official PDF catalog for detailed specs, features, and visuals.