iSpring RCC1D Tankless RO/DI System (5 Stage, 150 GPD)

What is the difference between RO and RO/DI water filtration?

Standard reverse osmosis removes most contaminants but leaves some dissolved minerals, typically achieving 95-98% reduction. RO/DI systems add a deionisation stage that removes remaining dissolved solids, achieving zero or near-zero TDS. This makes RO/DI water ideal for aquariums, laboratories and applications requiring ultra-pure water where even trace minerals could cause problems.

How often do the filters need replacing in this system?

Filter replacement frequency depends on water quality and usage. Typically, sediment and carbon filters require replacement every 6-12 months, the RO membrane lasts 2-3 years and the DI resin cartridge needs changing when TDS readings increase above acceptable levels. Heavy usage or poor source water quality may require more frequent changes.

What water pressure is required for optimal performance?

The system operates effectively with standard household water pressure between 40-80 PSI. Lower pressure may reduce flow rate and filtration efficiency. If your home has low water pressure, consider the RCC1DP model which includes a booster pump to maintain consistent performance regardless of inlet pressure conditions.

Can this system be used for drinking water applications?

Yes, this system produces safe drinking water by removing harmful contaminants including lead, chlorine and fluoride. However, the deionisation stage also removes beneficial minerals, creating very pure water. Some people prefer remineralising DI water for drinking, though it's perfectly safe to consume as produced.

How do I know when the DI resin needs replacement?

Monitor the output water with a TDS meter - when readings consistently exceed 10 PPM, the DI resin is exhausted and needs replacement. Fresh DI resin should produce 0-5 PPM readings. The resin colour may also change from its original state, though this isn't always a reliable indicator.

What is the waste water ratio for this system?

This system operates at approximately 1.5:1 waste to clean water ratio, meaning it produces 1 gallon of purified water for every 1.5 gallons of waste water. This is more efficient than many RO systems that typically operate at 3:1 or 4:1 ratios, making it more environmentally friendly and cost-effective.

Is professional installation required for this system?

No professional installation is required. The system features colour-coded tubing, quick-connect fittings and clear instructions for DIY installation. Most users can complete setup in 30-60 minutes using basic tools. The system can connect to standard taps or be permanently plumbed under a sink.

What contaminants does this system remove effectively?

The system removes over 1,000 contaminants including 98% of lead, chlorine, chloramines, fluoride, heavy metals, pesticides, pharmaceuticals, bacteria, viruses and dissolved solids. The five-stage process ensures comprehensive removal of both large particles and microscopic contaminants, delivering laboratory-grade water quality.