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Dishwashers

Help protect wash systems and heating elements.

How CITRYNE works

CITRYNE® uses citrate-based treatment to help keep calcium and magnesium from forming hard limescale deposits. It controls scale without removing the hardness minerals from your water. It also acts on scale that has already formed inside your equipment.

Lower maintenance costs
Fewer breakdowns
Longer equipment life

Talk to our team

Terry H2O

Systems & technical specifications

Match your equipment to the Terry H2O range.

SC100HSYS

Treatment: Carbon + CITRYNE®
Service flow rate: 7.6 L/min (2 GPM)
Operating pressure: 1.7–8.6 bar
Operating temperature: 1.7–38 °C
Stage 1 cartridge: 10″ × 100 mm · Activated carbon
Stage 2 cartridge: 10″ × 100 mm · CITRYNE®
Cartridge life: 6–12 months by water hardness
Connection (as supplied): ½″ inlet · ⅜″ quick-connect
Capacity guide: 27,400 LVery hard41,100 LHard54,800 LModerate / soft

Download specificationPDF · EN Original UK sheet · English

SC200HSYS

Treatment: Carbon + CITRYNE®
Service flow rate: 15.1 L/min (4 GPM)
Operating pressure: 1.7–8.6 bar
Operating temperature: 1.7–38 °C
Stage 1 cartridge: 10″ × 100 mm · Activated carbon
Stage 2 cartridge: 10″ × 100 mm · CITRYNE®
Cartridge life: 6–12 months by water hardness
Connection (as supplied): ½″ inlet · ⅜″ quick-connect
Capacity guide: 54,400 LVery hard81,600 LHard108,800 LModerate / soft

Download specificationPDF · EN Original UK sheet · English

SC300HSYS

Treatment: Carbon + CITRYNE®
Service flow rate: 22.7 L/min (6 GPM)
Operating pressure: 1.7–8.6 bar
Operating temperature: 1.7–38 °C
Stage 1 cartridge: 10″ × 100 mm · Activated carbon
Stage 2 cartridge: 10″ × 100 mm · CITRYNE®
Cartridge life: 6–12 months by water hardness
Connection (as supplied): ½″ inlet · ⅜″ quick-connect
Capacity guide: 81,800 LVery hard122,700 LHard163,600 LModerate / soft

Download specificationPDF · EN Original UK sheet · English

Specifications from the UK product documentation are nominal and subject to change. Confirm system selection, connections and local suitability with our team before ordering.

When should the cartridges be changed?

Water flow, total capacity and replacement time are three different things.

Flow rate · litres per minute: A rate such as 7.6 L/min describes how quickly water can pass through a system. It is not the total amount it can treat before replacement.
Total capacity · litres treated: Total capacity is the volume a system treats before replacement. The specifications with each system give a capacity guide in litres, worked out from its maximum flow and your water hardness: very hard water uses about half of it, hard water about three quarters and moderate or soft water the full figure.
Service interval · months: Terry’s hardness lookup sets the starting interval: six months in very hard water, nine in hard water and twelve in moderate or soft water. Heavy daily use can use up the scale-control capacity sooner — change at the interval, at the rated capacity or when the flow slows, whichever comes first. In two-stage systems, both cartridges are changed at the same time.

Your water hardness sets the interval

Your water hardness sets the interval
Water hardness	Typical hardness	Service interval
Very hard	≥ 285 mg/l CaCO₃	6 months
Hard	190–284 mg/l CaCO₃	9 months
Moderate / soft	< 190 mg/l CaCO₃	12 months

The capacity guide with each system shows the litres it treats in your hardness band.

Check your local water supplier’s hardness report to set the starting interval, and tell us your daily water use so we can confirm the right system and change date.

Discuss water use and replacement