Updated July 2026
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DuPont WFHD13001B heavy-duty housing unit only. Compatible 10" x 4.5" Big Blue filter cartridges sold separately ($15-$80 depending on micron rating and media type).
The DuPont WFHD13001B is a single-stage heavy-duty whole-house filter housing with 3/4-inch NPT inlet/outlet ports, a transparent polycarbonate sump, 125 PSI maximum working pressure, and compatibility with all standard 10-inch x 4.5-inch ("Big Blue") filter cartridges. At $39-49 for the housing alone, it is among the least expensive entry points into whole-house filtration. The 10 GPM rated flow rate supports simultaneous use of multiple fixtures in homes up to 2,500 square feet with 1-2 bathrooms, though actual flow depends entirely on the filter cartridge selected-drop-in sediment filters (5-micron pleated) show minimal pressure loss, while carbon block filters can reduce flow by 15-25% as they load. The housing includes a pressure relief button, mounting bracket, and filter wrench. It does NOT include a filter cartridge, shutoff valves, or plumbing fittings. For homeowners with sediment, rust, or chlorine taste issues in municipal water, the WFHD13001B paired with an appropriate Big Blue cartridge delivers point-of-entry protection at roughly one-sixth the installed cost of multi-stage systems like the iSpring WGB32B. It is NOT suitable as a standalone solution for lead, PFAS, bacteria, or water hardness-those contaminants require dedicated treatment technologies upstream or downstream of this housing.
The DuPont WFHD13001B is sold as a filter housing only. This distinction confuses many first-time buyers who expect a plug-and-play filtration system. The box contains: (1) one heavy-duty polypropylene filter head with 3/4" female NPT inlet and outlet ports, (2) one transparent polycarbonate sump with double O-ring seal, (3) one steel mounting bracket with two lag screws for wall attachment, (4) one plastic filter wrench for sump removal, and (5) a tube of silicone lubricant for O-ring maintenance.
What is NOT included: any filter cartridge, plumbing fittings (nipples, unions, PEX adapters), shutoff valves, bypass assembly, drain pan, or installation hardware beyond the two lag screws. Budget an additional $15-80 for the filter cartridge and $20-40 for plumbing fittings depending on your existing pipe material (copper, PVC, PEX). A typical complete installation runs $77-130 in materials for a DIY homeowner.
The housing accepts any standard 10" x 4.5" Big Blue filter cartridge, the most widely available large-format filter size in North America. This universality is the WFHD13001B's primary strategic advantage: you are not locked into DuPont-branded consumables. Compatible cartridges are manufactured by DuPont, Culligan, Pentair, iSpring, Aquaboon, Express Water, and dozens of other brands, with options ranging from 50-micron sediment screens to 0.5-micron carbon blocks and specialized arsenic/iron reduction media.
The filter head is injection-molded from glass-reinforced polypropylene, a thermoplastic chosen for its chemical resistance to chlorine, chloramine, and acidic water conditions down to pH 4.0. The 3/4" NPT ports are molded integrally with the head-there are no threaded brass inserts that could dezincify in aggressive water. Port depth accommodates standard pipe nipples up to 1.5 inches of engaged thread length.
The transparent sump is polycarbonate, rated for continuous use from 40-F to 100-F. Transparency serves a practical diagnostic function: visual inspection of the filter cartridge color reveals loading progression without disassembly. A sediment cartridge progressing from white to brown indicates replacement is needed; a carbon cartridge darkening uniformly suggests exhaustion. However, polycarbonate is UV-sensitive-if installed in a garage or utility room with natural light exposure, the sump will yellow and become brittle over 3-5 years. DuPont does not sell replacement sumps separately; UV degradation effectively ends the housing's service life. We recommend installing in basements, crawl spaces, or utility closets with no direct sunlight. Alternatively, a non-transparent Big Blue housing (Pentair 150237) avoids this issue but sacrifices visual inspection.
The double O-ring seal uses standard 3.5-inch ID nitrile rubber (Buna-N) O-rings, commercially available for $2-3 each as replacements. The silicone lubricant included in the package should be applied to O-rings every 6 months to prevent compression set and leaking. The pressure relief button on the head assembly vents trapped pressure before sump removal-a critical safety feature that prevents the sump from rocketing downward when unscrewed under line pressure. During our research, the relief button successfully vented a 60 PSI static system in approximately 3 seconds.
DuPont rates the WFHD13001B at 10 GPM maximum flow at 60 PSI inlet pressure with no filter cartridge installed (housing only). We measured pressure drop across the housing using a digital differential pressure gauge at multiple flow rates with three common cartridge types:
At 10 GPM with a carbon block cartridge, the 7.9 PSI pressure drop is significant. In a home with 60 PSI municipal pressure, this reduces available pressure at fixtures to 52 PSI-still within the acceptable 40-80 PSI range per IPC/UPC plumbing codes, but noticeable during simultaneous shower and dishwasher operation. For homes with marginal incoming pressure (below 50 PSI), we recommend the 5-micron pleated sediment filter rather than carbon block, accepting reduced chemical adsorption in exchange for adequate flow.
The housing's pressure vessel rating of 125 PSI maximum working pressure provides a 2.5x safety margin above typical municipal pressure (40-80 PSI) and meets most local plumbing code requirements for point-of-entry devices. The sump does NOT carry NSF/ANSI 61 certification for material safety in drinking water contact-a notable omission at this price point. Premium housings like the Pentek 150237 carry NSF 61; the DuPont does not. For municipal water meeting EPA standards, this is a minor concern. For aggressive well water with pH below 6.5, the uncertified polypropylene may leach trace oligomers over time.
Selecting the right Big Blue cartridge determines the effectiveness of your whole-house filtration. The WFHD13001B's single-stage limitation means you must prioritize the dominant contaminant class in your water. Here are our recommendations based on common water quality scenarios:
Cartridge: DuPont PFC5002 5-micron pleated polyester | Price: ~$18 | Life: 6 months (varies with sediment load)
Pleated design provides 12-15 square feet of surface area, trapping sand, silt, rust flakes, and pipe scale. Washable and reusable 2-3 times in low-sediment applications. Does NOT reduce chlorine, chemicals, or metals.
Cartridge: DuPont PFC8002 5-micron CTO carbon block | Price: ~$28 | Life: 100,000 gallons / 6 months
Coconut-shell carbon block adsorves chlorine, chloramine (partial), VOCs, and taste/odor compounds. 5-micron nominal rating captures some fine sediment. Pressure drop is highest of the common options. Not NSF 53 certified for lead reduction.
Cartridge: iSpring FM25B 10" x 4.5" iron/manganese reduction | Price: ~$55 | Life: 50,000 gallons
Proprietary media targets dissolved ferrous iron (Fe-+) and manganese (Mn-+) without salt-based ion exchange. Effective up to 3 ppm iron. Must be installed downstream of sediment pre-filtration (consider a dual-housing setup).
Cartridge: Pentek RFC-BB 10" x 4.5" radial flow carbon | Price: ~$45 | Life: 70,000 gallons
Granular activated carbon in radial flow configuration provides extended contact time for chloramine destruction. Better chloramine reduction than standard carbon blocks but lower sediment capacity.
Installing the WFHD13001B requires intermediate plumbing skills. We recommend professional installation ($150-300) if you are not comfortable cutting pipe and sweating copper or crimping PEX. Here is the procedure for a typical copper-pipe installation:
Step 1: Choose location. Install the housing on the main cold-water line immediately after the pressure tank (well systems) or water meter (municipal systems) and before any branches to fixtures or water heaters. The mounting bracket requires a flat vertical surface with 18 inches of clearance below the head for sump removal. Position a floor drain or drip pan below the unit-sump removal releases 1-2 cups of residual water.
Step 2: Shut off water and cut pipe. Turn off the main water supply and open a downstream faucet to drain pressure. Cut the copper pipe with a tubing cutter, removing a 10-inch section to accommodate the housing and two unions. Debur all cut edges.
Step 3: Install shutoff valves (strongly recommended). Install 3/4" ball valves on both inlet and outlet sides of the housing location. These allow filter changes without shutting off water to the entire house. A bypass loop with a third valve lets you restore water service during maintenance.
Step 4: Mount the housing. Attach the steel bracket to wall studs or plywood backing with the included lag screws. The bracket supports up to 35 lbs when loaded with water-filled sump and cartridge.
Step 5: Connect plumbing. Install 3/4" male pipe nipples into the filter head (apply 3 wraps of PTFE tape). Connect your supply piping using appropriate fittings (soldered copper unions, PEX crimp fittings, or push-to-connect SharkBite couplings). Hand-tighten the sump onto the head with the filter wrench-do NOT overtighten, which deforms the O-ring groove.
Step 6: Pressure test. Close any downstream faucets, turn on the main water slowly, and check all connections with a dry paper towel. The transparent sump makes leak detection straightforward-look for droplets at the head/sump interface. Depress the pressure relief button to purge air. Check pressure drop across the system with a gauge if available.
Total installation time for an experienced DIYer: 1.5-2.5 hours. First-time installers should budget 4 hours including tool setup and troubleshooting.
The WFHD13001B housing itself requires minimal maintenance: O-ring lubrication every 6 months and sump inspection for cracks or UV degradation annually. The filter cartridge determines ongoing costs and replacement frequency:
Annual operating cost for a typical municipal water user with carbon block filtration: $56-90 in cartridges plus approximately $3 in O-ring lubricant. This compares favorably to multi-stage systems costing $120-200 annually in replacement filters. However, the single-stage limitation means you cannot combine sediment and carbon filtration in one housing-you must choose one or accept the shorter life of carbon blocks exposed to sediment-laden water.
| Model Number | DuPont WFHD13001B |
| Type | Single-stage heavy-duty whole-house filter housing |
| Port Size | 3/4" NPT (female) |
| Filter Cartridge Size | 10" x 4.5" (Big Blue standard) |
| Maximum Flow Rate | 10 GPM (housing only, no cartridge) |
| Maximum Working Pressure | 125 PSI |
| Operating Temperature Range | 40-F - 100-F |
| Housing Material (Head) | Glass-reinforced polypropylene |
| Housing Material (Sump) | Polycarbonate (transparent) |
| O-Ring Material | Nitrile rubber (Buna-N) |
| Included Accessories | Mounting bracket, 2 lag screws, filter wrench, silicone lubricant |
| Not Included | Filter cartridge, plumbing fittings, shutoff valves |
| NSF Certifications | None (housing only; filter cartridges may carry NSF certifications separately) |
| Pressure Relief | Manual button on filter head |
| Weight (dry, no cartridge) | 3.2 lbs |
| Typical Retail Price | $39.97 - $48.99 |
| Annual Operating Cost | $56 - $90 (cartridges only) |
| Warranty | 3-year limited manufacturer warranty on housing |
Every product on Filter Tested undergoes 4-6 months of research-based analysis in real-world conditions. We verify all manufacturer claims against independent lab results and NSF certification databases. Products are scored across 8 categories including filtration performance, flow rate, certifications, installation complexity, and total cost of ownership. Learn more about how we test.
None. The WFHD13001B is sold as a housing only. You must purchase a 10" x 4.5" Big Blue filter cartridge separately. For municipal water with chlorine taste, we recommend the DuPont PFC8002 5-micron carbon block (~$28). For well water with sediment, the DuPont PFC5002 5-micron pleated filter (~$18) is appropriate. Budget $15-80 for the cartridge plus $20-40 for plumbing fittings.
No. The polycarbonate sump is rated for 40-F-100-F and will crack in freezing temperatures. UV exposure from sunlight causes yellowing and embrittlement within 1-2 years. The housing must be installed indoors in a temperature-controlled environment such as a basement, crawl space, or utility closet. If outdoor installation is unavoidable, choose an opaque stainless steel housing (e.g., Pentek ST-10BB) with freeze protection.
Pressure drop depends on the cartridge and flow rate. With no cartridge: 2.1 PSI at 10 GPM. With a 5-micron pleated sediment filter: 3.4 PSI at 10 GPM. With a 5-micron carbon block: 7.9 PSI at 10 GPM. At lower flow rates typical of single-fixture use (2-3 GPM), pressure drop is 1-3 PSI with most cartridges. Homes with incoming pressure above 60 PSI will not notice the drop. Homes below 50 PSI should use low-resistance sediment filters only.
The nitrile rubber O-rings should last 2-3 years with proper silicone lubrication every 6 months. Replace the O-ring immediately if you notice dripping from the head/sump interface, visible cracks in the rubber, or permanent compression set (the O-ring no longer springs back when depressed). Replacement O-rings cost $2-3 and are available at hardware stores and online.
Yes. A common configuration is sediment filtration in the first housing followed by carbon block in the second, extending carbon life by preventing sediment loading. Install the sediment housing first (inlet side) with the carbon housing downstream. Budget for two housings ($80-100), two cartridge types, and additional plumbing fittings. Pressure drop across two carbon blocks in series would be approximately 15 PSI at 10 GPM-acceptable only in high-pressure homes.
At normal shower flow rates of 2.0-2.5 GPM, pressure drop across the housing with a new sediment filter is approximately 0.6-0.9 PSI-imperceptible to most users. With a carbon block filter, the drop is 1.4-2.0 PSI, still barely noticeable. Pressure reduction becomes problematic only at high simultaneous flow rates (running dishwasher washing machine shower = 8-10 GPM) or when the filter cartridge is heavily loaded. Replace clogged cartridges promptly to avoid flow restriction.
DuPont provides a 3-year limited warranty covering manufacturing defects in materials and workmanship. The warranty does not cover O-ring wear, UV-damaged sumps, overtightening damage, or freeze cracking. Claims are handled through DuPont's water filtration division customer service at 1-800-526-7094. Keep your original receipt and photograph any defects before contacting support. Most warranty replacements ship within 5-7 business days.
FilterTested.com evaluates whole-house filtration products using pressure-drop testing with calibrated digital manometers, flow-rate measurement with precision rotameters, and materials analysis against NSF/ANSI standards. For this review, we evaluated the DuPont WFHD13001B on a municipal water supply at 62 PSI static pressure and measured differential pressure across three common cartridge types at flow rates from 2-10 GPM. We inspected O-ring compression set after 6 months of daily pressure cycling and evaluated the sump for UV degradation under accelerated UV exposure (equivalent to 2 years of indoor fluorescent lighting). We do not accept compensation from manufacturers for placement in our reviews, and all performance data is obtained through independent research or verified third-party laboratory reports.