2-stage 20" x 4.5" Big Blue water softening / Pre Auto Detailing Water softer Filtration System
2-Stage 20" x 4.5" Big Blue Pre-Auto-Detailing Water Filtration System with Sediment and Cation Resin Filters
Prepare your source water for vehicle washing and detailing with the Max Water 2-Stage Big Blue Pre-Auto-Detailing Water Filtration System. This system combines fine sediment filtration and cation exchange resin to help reduce suspended particles and a limited amount of hardness minerals before the water reaches downstream detailing equipment.
The system uses full-size 20" x 4.5" Big Blue cartridges for increased media capacity and longer service intervals compared with standard slim-line cartridges. Its 1" female NPT ports allow it to connect to many residential, garage, workshop, and light-commercial plumbing installations.
This configuration may also be used for selected residential applications where fine sediment filtration and limited hardness reduction are required. However, it is primarily designed as a pre-treatment stage for auto-detailing water systems.
Two Stages of Pre-Auto-Detailing Water Treatment
- 1-Micron Polypropylene Sediment Filter
Part No. 104111 . Captures fine sand, rust, dirt, silt, and other suspended particles before they reach the cation resin cartridge or downstream detailing equipment. - Cation Exchange Resin Filter
Part No. 104120 . Helps reduce calcium, magnesium, and selected positively charged hardness ions through ion exchange. The cartridge provides limited softening capacity and is intended for lower-flow applications.
How This System Supports Auto Detailing
Hardness minerals such as calcium and magnesium can remain on a vehicle surface after water evaporates. These dissolved minerals may contribute to spotting, especially when the vehicle is allowed to air-dry.
The cation resin cartridge helps reduce a limited quantity of hardness minerals before the water reaches a downstream polishing or deionization stage. By reducing part of the mineral load first, the system may help extend the service life of compatible post-treatment media.
The included 1-micron sediment cartridge also protects the resin and downstream components by capturing fine particulate matter. Because it is a fine filter, it may clog faster than a 5-micron cartridge when the incoming water contains heavy sediment.
Important Flow-Rate Limitation
Although the Big Blue housings and 1" plumbing connections may be capable of higher mechanical flow, the complete treatment system must operate within the rated flow of the cation resin cartridge.
Pressure Gauge Monitoring
The included liquid-filled pressure gauge helps monitor system pressure and identify changes in water flow through the cartridges.
Reduced pressure or lower flow may indicate that the 1-micron sediment cartridge is becoming clogged. Fine sediment cartridges may require more frequent replacement when the source water contains heavy dirt, rust, or suspended solids.
Resin exhaustion may not create a noticeable pressure change. Hardness testing should be used to determine when the cation resin cartridge has reached the end of its useful capacity.
Key Features and Benefits
- Auto-detailing pre-treatment: Helps prepare source water before compatible spot-free rinse or DI equipment.
- Fine sediment filtration: The 1-micron cartridge captures smaller suspended particles than a standard 5-micron prefilter.
- Limited hardness reduction: Cation resin helps reduce calcium, magnesium, and selected hardness ions.
- Helps protect downstream media: Reducing sediment and part of the hardness load may help extend the life of compatible post-treatment cartridges.
- High-capacity Big Blue design: Uses standard 20" x 4.5" replacement cartridges.
- 1" female NPT ports: Provide convenient connection to compatible plumbing installations.
- Double O-ring housing seals: Help provide a secure seal when correctly installed and maintained.
- Pressure-relief buttons: Help release trapped pressure before cartridge maintenance.
- Replaceable cartridges: Allow each treatment stage to be serviced separately.
- Compact wall-mounted design: Suitable for garages, workshops, detailing bays, and utility rooms.
Helps Reduce
- Fine sand, silt, dirt, rust, and suspended sediment
- Turbidity caused by suspended particles
- Calcium hardness within the resin's available capacity
- Magnesium hardness within the resin's available capacity
- Mineral load before compatible DI or spot-free rinse equipment
- Particles that may clog hoses, spray equipment, or downstream filters
Package Includes
- Two 20" x 4.5" Big Blue filter housings with double O-ring seals and pressure-relief buttons
- One 60 mm liquid-filled pressure gauge
- One 1-micron polypropylene sediment filter
- One cation exchange resin hardness-reduction filter
- One heavy-duty PVC ball valve
- One hex nipple fitting
- One filter housing wrench
- One heavy-duty two-stage steel wall-mounting bracket
- Installation hardware for the filtration bracket
- One-year manufacturer's limited warranty
Technical Specifications
| Specification | Value |
|---|---|
| System Type | Two-stage pre-auto-detailing sediment and cation resin water-treatment system |
| Filter Cartridge Size | 20" x 4.5" Big Blue |
| Number of Filter Stages | 2 |
| Flow Direction | Right-side inlet to left-side outlet |
| Inlet and Outlet Connections | 1" female NPT |
| Sediment Filter Rating | 1 micron nominal |
| Estimated Sediment Filter Life | Up to approximately 6 months* |
| Cation Resin Capacity | Approximately 4,500 grains* |
| Maximum Recommended Treatment Flow | Approximately 2 GPM* |
| Maximum Operating Pressure | 90 PSI |
| Recommended Operating Pressure | 20–60 PSI |
| Operating Water Temperature | 40–100°F / 5–38°C |
| Compatible Feed-Water pH Range | 4.0–10.0 |
| Maximum Feed-Water TDS | 2,000 ppm |
| Approximate Dimensions | 27.5" H x 15" W x 8" D |
| Approximate Weight | 32 lb. |
*Actual sediment-filter life and resin capacity depend on incoming hardness, sediment concentration, flow rate, daily water use, competing ions, pH, temperature, operating pressure, and overall water chemistry. The housing connection size does not determine the treatment flow. The complete system should be operated within the cation resin cartridge's recommended maximum flow when hardness reduction is required.
TDS = Total Dissolved Solids.
Recommended Applications
- Professional auto-detailing pre-treatment
- Mobile car-detailing setups
- Vehicle-washing and rinse-water preparation
- Pre-treatment before compatible DI resin systems
- Pre-treatment before spot-free final-rinse equipment
- Garages, workshops, and detailing bays
- Low-flow hardness-reduction applications
- Fine sediment filtration before sensitive equipment
- Selected residential utility-water applications
- Protection of compatible downstream filtration cartridges
Installation and Maintenance Information
- Test the source water for hardness, TDS, iron, manganese, pH, and other relevant contaminants before sizing the system.
- Install the 1-micron sediment cartridge in the first housing on the inlet side.
- Install the cation resin cartridge in the second housing on the outlet side.
- Connect the incoming water to the right-side inlet and the treated water line to the left-side outlet.
- Do not exceed approximately 2 GPM when hardness reduction is required.
- Install a separate 5-micron prefilter before this system when the source water contains heavy sediment.
- Support the system securely using the supplied steel bracket and suitable mounting hardware for the wall structure.
- Leave sufficient clearance beneath the housings for cartridge replacement and routine maintenance.
- Use suitable thread sealant or PTFE tape on NPT connections. Do not overtighten plastic ports or fittings.
- Shut off the incoming water supply and release system pressure before opening either housing.
- Lubricate O-rings only with food-grade silicone lubricant. Do not use petroleum-based lubricants.
- Flush both cartridges according to the product instructions before placing the system into normal service.
- Test the treated water hardness periodically to determine when the resin cartridge requires replacement.
Frequently Asked Questions
Q. Will this system produce 0-PPM water?
A. No. This is a pre-treatment system. The cation resin reduces selected hardness ions, but it does not remove all dissolved minerals. A compatible DI or other final polishing system is required when zero-PPM water is the target.
Q. Can I use this system by itself for a spot-free final rinse?
A. Spot-free performance is not guaranteed when this system is used alone. Remaining dissolved minerals may still leave spots after the water evaporates. Use downstream DI treatment and verify the final TDS before air-drying a vehicle.
Q. What does the cation resin remove?
A. Cation exchange resin primarily targets positively charged ions such as calcium and magnesium. Its capacity is limited and depends on the hardness level, water usage, flow rate, and competing ions.
Q. Why is the maximum treatment flow only 2 GPM when the ports are 1 inch?
A. The 1-inch ports describe the plumbing connection size, not the effective resin-treatment rate. The resin requires sufficient contact time to exchange hardness ions. Operating above approximately 2 GPM may reduce hardness-removal performance.
Q. Why does the system use a 1-micron sediment filter?
A. The fine sediment filter captures smaller particles before they reach the resin and downstream detailing equipment. This helps protect spray nozzles, hoses, valves, and polishing media from particulate buildup.
Q. Why is my 1-micron filter clogging quickly?
A. 1-micron cartridge captures very fine particles and may clog quickly when the source water contains heavy sediment. Installing a separate 5-micron sediment prefilter can reduce the load on the 1-micron stage.
Q. How do I know when the cation resin is exhausted?
A. Resin exhaustion may not cause a pressure drop. Test the treated water hardness periodically. When hardness begins to rise toward the untreated-water level, replace the resin cartridge.
Q. Can the pressure gauge show when the resin is exhausted?
A. No. The gauge can help identify flow restriction or a clogged sediment cartridge, but it cannot reliably measure remaining ion exchange capacity. Water testing is required.
Q. Does this system reduce chlorine or bad odor?
A. No activated carbon cartridge is included in this configuration. Chlorine, taste, and odor concerns require a suitable carbon stage or another treatment method.
Q. Can I use this system as a whole-house water softener?
A. It provides limited cartridge-based hardness reduction, but it is not equivalent to a full-size automatically regenerating water softener. Whole-house, high-flow, or high-hardness applications may exhaust the cartridge rapidly.
Q. Does this system reduce TDS?
A. It may change the ionic composition of the water, but it is not designed to produce substantial overall TDS reduction. DI or reverse osmosis treatment is required when broad dissolved-solid reduction is needed.
Q. How long will the cation resin cartridge last?
A. Service life depends on the source-water hardness and the number of gallons treated. A water test and the stated 4,500-grain capacity can be used to estimate service life, but periodic treated-water testing is the most reliable method.
