Oakton (WD-35653-10) TDS 447 Pouch (300 PPM) 20 pouches-box TW30-1812-100 Lubricate the brine seal and

Lubricate the brine seal and o-rings with clean water or glycerin

Oversized Capacity

Works With All Standard TDS Meters

🔧 Replace the carbon block cartridge every 6-12 months depending on water quality and usage

5% salt rejection ✓ 36 ft² active surface area ✓ 4"×21" form factor

Oakton (WD-35653-10) TDS 447 Pouch (300 PPM) 20 pouches-box TW30-1812-100 Lubricate the brine seal andThe Oakton WD 35653 10 TDS 447 Pouch delivers factory calibrated 300 PPM reference solution in individually sealed pouches for on site meter verification. Each box contains 20 single use pouches standardized against NIST materials with 1% accuracy at 25C. SPECIFICATIONS TDS 447 Calibration Standard TDS Concentration 300 PPM Factory standardized Accuracy 1% At 25C Traceability NIST Certified reference Package Quantity 20 Pouches Single use sealed