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 meant for inline installation, it’s built for supply lines that need more than general-purpose filtration, typically once a test has confirmed elevated levels rather than as a precaution taken beforehand. We also position this model as a heavy metals water filter more broadly, since the added media targets several regulated metals, not just one contaminant in isolation. Anyone comparing options after a lab result should start here rather than with a standard single-stage cartridge.
Why These Levels Matter
These contaminants can occur naturally in groundwater or enter tap supply through aging infrastructure, and the EPA maximum contaminant levels set under the Safe Drinking Water Act are the benchmark most labs test against. If a result puts your supply at or near those thresholds, a water filter for arsenic like this one makes more sense than general-purpose carbon alone, since it’s built around dedicated removal media rather than broad-spectrum filtration. That same reasoning applies whether the lab flagged one specific metal or a wider mix of elevated heavy metal levels across your test panel; either way, a targeted water filter arsenic households can rely on beats guessing at coverage from a standard cartridge.
How It Goes Beyond Standard Gen4
The WD-HMG4-JG layers dedicated 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 stage carries WQA Gold Seal certification, the added media is CLB Labs tested performance data rather than WQA-certified, and we state that distinction plainly instead of implying broader certification than the added stage actually carries. As an arsenic water filter system, that transparency matters, and the same combo also works as a water filter for arsenic removal or for households focused on heavy metals removal more generally, not one contaminant alone.
Where It Connects
This unit uses standard John Guest quick-connect fittings sized for quarter-inch tubing, fitting refrigerators, ice makers, and RV supply lines the same way our other inline products do. Weighing an arsenic removal water filter against a water filter to remove arsenic built for under-sink use instead? This JG variant is designed for appliance-line installation, not a faucet-mounted setup; our WD-HMG4-DC covers that under-sink case with the same non-RO filtration approach and media combination. As a heavy metals removal filter, this one sits specifically on the inline, appliance-fed side of the lineup.
Getting It Installed
Installation follows the same tool-free, push-to-connect process as our other John Guest products: connect the housing to your existing quarter-inch line, and treated supply is flowing 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 lab test confirming elevated arsenic or other heavy-metal levels is the clearest signal. If results land near or above regulatory thresholds, a dedicated removal filter like the WD-HMG4-JG is worth adding rather than relying on standard filtration alone.
Does this filter remove both arsenic and lead?
Yes, the dedicated removal media in this unit targets both arsenic and lead, layered with the standard Gen4 Advanced stage that also handles 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 removal media is CLB Labs-tested rather than WQA-certified, and 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 households with confirmed elevated contaminant levels.
Will this fit my refrigerator or ice maker?
Yes, it uses the same quick-connect fittings on quarter-inch tubing as our other inline products, so it fits most refrigerators, ice makers, and RV supply lines.
