Chemical Dosage Instructions for Pure Water Products’ Chemical Feed Systems

Spectraguard: Dosing to protect large RO units from hardness and iron damage. These are “round number” recommendations for dosing concentrated Spectraguard liquid for the Watts RO units that we supply. Settings are for the Stenner 0.2-3.0 gpd peristaltic pump.

Watts RO Unit

Solution Mixture

(amount of Spectraguard 111 added to 12.5 gallons of clean water)

Pump Setting

(using Stenner 0.2 – 3.0 gpd pump)

R12 –

600 GPD

1/4 cup 4

R12 –

1200 GPD

1/4 cup 6

R4x40 –

2200 GPD

1/2 cup 4

R4x40 –

4400 GPD

1/2 cup 6

R4x40 –

6600 GPD

1 cup 5