Direct answer: HALO’s 2026 spec sheet lists four HALO 5 sizes. The H5-100 has a 10 x 54-inch tank, a 1-inch connection and a 1,000,000-gallon capacity. The H5-125 has a 12 x 52-inch tank, a 1¼-inch connection and 1,500,000 gallons. The H5-150 has a 13 x 54-inch tank, a 1½-inch connection and 2,000,000 gallons. The H5-200 has a 16 x 65-inch tank and a 2-inch connection, and is labeled “Commercial – 3M Gal.” All four capacities are based on chlorine reduction at 1 ppm; they are not softening capacities. The residential HALO 5 warranty covers tanks up to 13 inches in diameter, which excludes the 16-inch H5-200.
Publisher boundary: Water System Guide is an independent research publisher, not HALO or a HALO dealer. Specifications come from the HALO 5 spec sheet (Rev.3326, ©2024) and related HALO documents reviewed October 8, 2026. HALO does not publish a service flow rating for each size on the sheet, so this page does not invent one. Your installer should state the model and the reason for the size in writing.
HALO 5 specifications by model
From the HALO 5 spec sheet, page 2:
| Part number | System label | Tank size | Weight | Height | Width x depth | Inlet/outlet | System capacity |
|---|---|---|---|---|---|---|---|
| H5-100 | HALO 5 – 1” | 10” x 54” | 93 lb | 61” | 10” x 10” | 1” | 1,000,000 gallons |
| H5-125 | HALO 5 – 1.25” | 12” x 52” | 121 lb | 59” | 12” x 12” | 1.25” | 1,500,000 gallons |
| H5-150 | HALO 5 – 1.50” | 13” x 54” | 148 lb | 73” | 13” x 13” | 1.50” | 2,000,000 gallons |
| H5-200 | HALO 5 – 2” | 16” x 65” | 246 lb | 74” | 16” x 16” | 2” | Commercial – 3M gallons |
All four sizes use the same five stages: acid-washed GAC, catalytic HAC, HALO AG Plus (to about 5 microns), high-density garnet (10–20 microns) and the HALO ION conditioner (spec sheet, page 1). Size changes the amount of media and the plumbing connection, not the treatment stages.
What does the gallon capacity mean?
The sheet says twice: “Capacities based on chlorine reduction at 1ppm of chlorine.” The gallons describe how much municipal water the carbon stages can treat for chlorine under that condition. They are not a hardness rating, because HALO 5 does not remove hardness, and they are not a guarantee for water with a different chlorine or chloramine level.
HALO’s FAQ ties the H5-100 figure to a time frame. It says carbon life is based on the average water use of a family of four over ten years, or 1 million gallons, and that larger households can choose larger systems for a ten-year life span. It also defines end of life for the H5-100 as about 1 million gallons, or when the treated water tests positive for chlorine.
How long would each size last at your water use?
The arithmetic below is ours: gallon capacity divided by daily use and 365 days. It assumes HALO’s 1 ppm chlorine basis and is not a HALO projection. Read your daily use from a water bill: divide the billed gallons by the days in the billing period.
| Daily household use | H5-100 (1.0M gal) | H5-125 (1.5M gal) | H5-150 (2.0M gal) |
|---|---|---|---|
| 200 gallons/day | ~13.7 years | ~20.5 years | ~27.4 years |
| 300 gallons/day | ~9.1 years | ~13.7 years | ~18.3 years |
| 400 gallons/day | ~6.8 years | ~10.3 years | ~13.7 years |
Two cautions apply. First, the warranty’s media commitment is time-limited: one replacement carbon media package within 10 years of installation for a chlorine-related media failure, freight and handling excluded (HALO 5 warranty). A size that stretches beyond ten years on paper does not extend that commitment. Second, higher chlorine or chloramine levels than the 1 ppm basis are outside the sheet’s stated condition. The warranty requires influent chlorine of no more than 1 mg/L.
Connection size and flow
HALO’s sheet gives the inlet and outlet size but no gallons-per-minute rating for each model. The connection steps up with the model (1”, 1¼”, 1½” and 2”), and HALO’s FAQ refers to “systems with larger flow rates and larger media beds” for larger households. Without a published flow rating, do not assume a size from your pipe diameter alone.
Ask the installer for the service flow rating of the proposed model. Then compare it with your home’s peak demand, which you can estimate with our whole-house flow rate calculator. Our whole-house filter sizing guide explains why contact time and flow matter for carbon filters generally.
Space, weight and installation limits
The H5-150 is the tallest residential size at 73 inches, taller than the H5-125 at 59 inches. Check ceiling height and service clearance, not only the floor footprint. Weights run from 93 pounds for the H5-100 to 148 pounds for the H5-150, and 246 pounds for the H5-200.
Every size shares HALO’s installation conditions: cold water only, no more than 80 psi, a protected non-freezing location, a 120-volt outlet and a ¾-inch drain. Our HALO 5 installation guide covers these in detail.
Is the H5-200 a residential system?
The documents point both ways. The spec sheet lists the H5-200 with “Commercial – 3M Gal.” in the capacity column, while its warning block says the systems are “Intended for residential use only.” The HALO 5 warranty covers “point of entry residential water filters and conditioners (up to 13” diameter tanks)” and is valid only on residential applications treating municipal water. The H5-200’s tank is 16 inches in diameter.
If an H5-200 is proposed for a home, ask HALO or the seller in writing which warranty applies to it.
Which size should you ask about?
Use three inputs and let the installer explain the choice:
- Daily water use from your bill, for the capacity table above.
- Peak flow in gallons per minute, compared against the service flow rating the installer provides.
- Water source and chlorine level. HALO 5 is intended for municipal water. On a well, HALO requires a current well water report or all warranties are void.
If the goal is lower measured hardness, HALO 5 is the wrong comparison. See HALO 5 vs CK10 vs Hybrid. For warranty terms across HALO’s products, see our HALO warranty guide. The H5-100 model record has the smallest size’s catalog entry.
Frequently asked questions
What is the difference between the HALO H5-100 and H5-125?
The H5-100 has a 10 x 54-inch tank, a 1-inch connection, weighs 93 pounds and is rated for 1,000,000 gallons. The H5-125 has a 12 x 52-inch tank, a 1.25-inch connection, weighs 121 pounds and is rated for 1,500,000 gallons. Both capacities are based on chlorine reduction at 1 ppm.
How long does a HALO 5 last?
HALO rates capacity in gallons, not years. Its FAQ links the H5-100’s 1 million gallons to about ten years for an average family of four. By our arithmetic, a home using 300 gallons a day would reach 1 million gallons in about nine years. Higher use shortens that.
Does a bigger HALO 5 remove more hardness?
No. HALO 5 does not remove hardness minerals at any size. The gallon capacities describe chlorine reduction at 1 ppm. For hardness removal, HALO sells the CK10 softener and the Hybrid.
Is the HALO H5-200 covered by the residential warranty?
HALO’s HALO 5 warranty covers residential systems with tanks up to 13 inches in diameter, and the H5-200 has a 16-inch tank and is labeled commercial on the spec sheet. Ask HALO in writing which warranty applies before buying one for a home.
Sources and review scope
- HALO 5 spec sheet, Rev.3326, ©2024, uploaded August 2026; retrieved October 8, 2026. Pages 1 (media stages) and 2 (specifications, warnings and notes).
- HALO 5 limited product warranty, Rev.3326, retrieved October 8, 2026.
- HALO frequently asked questions, retrieved October 8, 2026.
- Years-of-use figures are our arithmetic from HALO’s gallon capacities. They are not manufacturer claims.