Watch Water | Trappsorb

Introduction

The purest magnesium oxide now in the form of Trappsorb is available in the water treatment industry. The Trappsorb produced by Watch Water is 99.99% pure MgO + CaO free-flowing uniform bead’s.

Trappsorb is a porous, amorphous form of Magnesium(MgO). Although it has the same chemical composition as granular products, is radically different to other MgO- based materials due to its unique outer surface and structure, it is composed of a unique manufacturing process giving it’s uniformity and Macroscope pores. As opposed to granular MgO, Trappsorb have larger pores with a wide range of diameters. To ensure drinking Water Quality, all Adsorber division products are certified by WQA to meet ANSI/NSF 61 standard.

Packing Data

Packaging Standard

28.3 liter/ bag

Big Bags available on request

Technical Data

Description

Beads specifically designed for potable water as well as waste water treatment. Removal of Silica, Phosphates, Ammonia, CO₂, H₂S and heavy metals. Neutralization of all acidic water as specifically designed for corrosive deionized, soft water and for enriching water with Magnesium and Calcium.

Chemical and Physical Properties

Magnesium Oxide (MgO) %         80%
Calcium Oxide (CaO) %                10%
Proprietary                                     10%

Chemically inert, No metals present

Granule Size

1.2 – 3.4 mm

Bulk Density

1140 – 1275 kg/m³

Download Links

Brochure

System Design

Download MSDS

Frequently Asked Questions

Trappsorb is a highly versatile media that removes a wide range of contaminants—especially when used as part of a complete system, followed by Crystolite or Zeosorb filtration for optimal performance. It effectively targets:

• Heavy metals (e.g., copper, zinc, nickel)
• Phosphates
• Ammonia (NH₃)
• Hydrogen sulfide (H₂S)
• Carbon dioxide (CO₂)
• Boron
• Silica

It also helps with pH adjustment without the need for caustic chemicals like NaOH or KOH. By naturally increasing pH and enriching water with magnesium, Trappsorb helps prevent corrosion—no chemical inhibitors required.

Bonus Benefits:

• Remineralizes waterwith beneficial magnesium (Mg²⁺), supporting WHO standards for desalinated water.
• Eco-friendly & safe:Non-toxic, non-corrosive, easy to handle, and certified for potable water use (NSF/ANSI/CAN 60).

We’ve made system design easy! You can download our detailed system design guide here: Trappsorb System Design PDF

As water passes through Trappsorb, it undergoes a powerful adsorption process. Positively charged contaminants like heavy metals are captured, while beneficial OH⁻ ions are released—improving water quality by balancing ions and reducing unwanted substances. For a full list of treatable contaminants, please refer to our brochure.

For the best results, a pH between 6.7 and 6.9 is recommended. This range enhances Trappsorb’s performance in removing a broad spectrum of contaminants. Follow by filtration with Crystolite/Zeosorb.

Hydrochloric acid (HCl) is a reliable and effective option for adjusting the pH before the Trappsorb system.

Trappsorb is made from a carefully balanced blend of:

• Magnesium Oxide (80%)
• Calcium Oxide (10%)
• Proprietary Ingredients (10%)

This unique composition enables both contaminant removal and corrosion control.

Trappsorb’s corrosion prevention system—CorrTrapp—uses advanced passivation technology to form a protective layer inside pipes, stopping corrosion before it starts. It also stabilizes pH (up to 9.5), eliminating the need for phosphate or sodium hydroxide dosing.

Learn more in our CorrTrapp brochure:

TRAPPSORB

Absorbents for water treatment