Water supplies with elevated levels of heavy metals require specialized filtration. Our ADVANCED Combo filter combines our Advanced filtration formula with additional heavy metals removal media / Lead removal media. Therefore making it ideal for households with high heavy metal (HM) contaminant levels.
HMG4 stands for Heavy Metals removal (HM, especially lead removal) and Gen4 Advanced media. It is combined into a single stage filtration unit. This is primarily for homes with a whole house sediment filtration system OR with low sedimentation levels that need Heavy Metals Removal.
Product Specifications:
Removal Capabilities: Our advanced filter removes 99.9% of lead, heavy metals, chlorine, chromium 6, mercury, volatile organic compounds, carcinogens, and other contaminants, turbidity, PFAS, odors, and bad tastes (claims tested by CLB Labs and are not certified by WQA).
Product Dimensions: 15.4″ X 3.6″ (7″ space needed with the hoses) X 2.52″
Application: Residential Point of use (POU). Same as our Gen4 ADV (WD-G4-JG) but with more heavy metal removal media, for residential areas with increased levels of heavy metals in the water (higher than EPA’s critical level of heavy metals).
System includes: WD-HMG4-REP cartridge. Head with a built-in shut off valve, inlet and outlet welded in 1/4″ John Guest fittings | Fits All 1/4″ Plastic Flex Tubing and Flexible Copper Tubing used for water supply to ice makers and refrigerators, etc. 1/4” JG also fits the 1/8″ PEX TUBING as its O.D. is the same as 1/4” Tube. DOES NOT FIT BRAIDED HOSES.
Common applications include; Woder WD-HMG4-JG with Gen4 Advanced Media (G4) and more heavy metal removal formula for higher than EPA’s recommended level of heavy metals. Point of use (POU) inline water filter for refrigerators, dedicated filtered water faucets (under sink), and RVs
Cartridge lifespan: 1 year under warranty.
Selective Filtration™ combined with additional heavy metal removal.
Heavy metals are present in all water supplies; however, excessive levels of heavy metals require filtration formulated to remove excess contaminants. The problem is they accumulate in the body and are difficult to remove. Our ‘Combo’ Filter is ideal for communities with increased levels of heavy metals.
Our proprietary Selective Filtration™ technology removes 99.9% of contaminants while leaving in all essential minerals. Reverse Osmosis (RO) filters also remove 99.9% of contaminants, however, RO also remove ALL the minerals found in tap water – including minerals your body needs. RO systems can waste thousands of gallons of water annually while flushing contaminants down the drain.
Arsenic & Heavy Metal Removal Inline Water Filter (WD-HMG4-JG)
For households with confirmed elevated arsenic or heavy-metal levels, the WD-HMG4-JG pairs our standard Gen4 Advanced media with a dedicated removal stage built specifically for that added contaminant load. As an arsenic water filter for inline installation, it’s meant for water that needs more than general-purpose filtration – typically after a test has confirmed elevated levels, rather than as a precaution taken beforehand.
Why These Levels Matter
Arsenic and other heavy metals can occur naturally in groundwater or enter tap water through aging infrastructure, and the EPA sets maximum contaminant levels for these substances under the Safe Drinking Water Act. If a test puts your water at or near those thresholds, a targeted water filter for arsenic like this one makes more sense than a standard single-stage filter, since it’s built around dedicated removal media rather than general-purpose carbon alone. That same targeted approach applies whether you’re specifically after water filter arsenic reduction or broader heavy metals removal filter protection.
How It Goes Beyond Standard Gen4
The WD-HMG4-JG layers a dedicated arsenic and heavy-metal removal media on top of the standard Gen4 Advanced stage rather than relying on Gen4 alone. Worth being precise here: only the base Gen4 Advanced stage carries WQA Gold Seal certification – the added heavy-metal and arsenic removal media is CLB Labs-tested rather than WQA-certified. As an arsenic water filter system or water filter for arsenic removal, that distinction matters, and we state it plainly rather than implying broader certification than the added media actually carries. This same combo filter also works well for households focused on heavy metals removal more broadly, not arsenic specifically.
Where It Connects
This filter uses standard John Guest quick-connect fittings sized for quarter-inch tubing, fitting refrigerators, ice makers, and RV water lines the same way our other inline products do. Comparing an arsenic removal water filter against a water filter to remove arsenic built for under-sink use instead? Note that this JG variant is designed for appliance-line installation, not a faucet-mounted setup – our WD-HMG4-DC covers that under-sink case. As a heavy metals water filter, this one sits specifically on the inline, appliance-fed side of the product line.
Getting It Installed
Installation follows the same tool-free, push-to-connect process as our other John Guest filters: connect the housing to your existing quarter-inch line, and you’re filtering water within minutes. There’s no water filter arsenic removal plumbing expertise required, and no drilling into cabinetry.
Frequently Asked Questions
How do I know if I need an arsenic water filter?
A water test confirming elevated arsenic or heavy-metal levels is the clearest signal. If results land near or above EPA maximum contaminant levels, a dedicated removal filter like the WD-HMG4-JG is worth adding.
Does this filter remove both arsenic and lead?
Yes – the dedicated heavy-metal removal stage in this filter targets both arsenic and lead, layered with the standard Gen4 Advanced media for chlorine and PFAS reduction.
Is the WD-HMG4-JG certified to remove arsenic and heavy metals?
The base Gen4 Advanced stage is WQA Gold Seal certified. The added arsenic and heavy-metal removal media is CLB Labs-tested rather than WQA-certified – we state this distinction precisely rather than implying broader certification.
What is the difference between this and Woder’s standard Gen4 filter?
The standard Gen4 Advanced filter reduces chlorine, lead, and PFAS through a single stage. The WD-HMG4-JG adds a dedicated second removal media specifically for arsenic and heavy metals, for households with confirmed elevated levels.
Will this fit my refrigerator or ice maker?
Yes – it uses the same John Guest quick-connect fittings on quarter-inch tubing as our other inline filters, so it fits most refrigerators, ice makers, and RV water lines
