MetSorb® HMRG
Arsenic Filter Calculator

Find the Clean Water Store MetSorb arsenic filter for your peak flow, and estimate how long the media lasts. Media life is calibrated against Graver Technologies calculator data.

1
Your System
GPM
We size MetSorb to its Service flow rating (5 gpm per sq ft), which keeps at least 3 minutes of contact time at your peak flow.
2
Water Quality
ppb
%
As(V) is easier to remove. If unknown, use 80%.
pH
Under 8.0 is best. 8.0–8.5: shorter media life. Over 8.5: correct the pH first.
ppm
ppb As(V)
EPA MCL = 10 ppb
3
Water Use
gallons/day
MetSorb HMRG — Estimated Performance
MetSorb HMRG Specifications
ParameterValue
Media TypeCrystalline TiO₂ (Anatase)
Bulk Density0.65 g/cc (40 lb/ft³)
Particle Size-16/+60 U.S. mesh
Surface Area200–240 m²/gram
Service Flow Rate5 gpm/ft² (Maximum 10)
Contact Time (EBCT)3 minutes minimum
Backwash Rate5 gpm/ft² routine (4 minimum; 7 for recovery only)
Backwash FrequencyInitial + monthly (or 8–10 weeks)
Backwash Volume5–7 bed volumes (35–50 gal per cu ft)
pHUnder 8.0 (8.0–8.5 shorter life; over 8.5 correct pH first)
Arsenic 50 ppb or moreTwo tanks in series (lead/lag)
Min Bed Depth24 inches
Max Feed Temp150°F
DisposalNon-hazardous (TCLP & CA WET)
Pre-treatment: Install a dual-grade 50/5 micron sediment pre-filter ahead of the arsenic filter (Dual Grade 50/5 Micron 4.5" x 20" cartridge). Iron < 0.3 ppm, Mn < 0.04 ppm. pH under 8.0. If H₂S is present, additional pre-treatment is required. Install MetSorb before a softener, not after it (a softener ahead costs 15% or more of media life).
Need help sizing? 888-600-5426 · support@cleanwaterstore.com
© Clean Water Store · cleanwaterstore.com