The AP420 hot water protection/scale inhibitor filters are attractively priced, but it's too early to rate their effectiveness. I replaced the existing filter about a month ago (October 2021) and will be replacing it in 12 months. The filter is used to supply hot water in the "summer house" and has been in operation in this form for almost half a year.
Filter under the sink Aquaphor Favorit ECO silver
20 Review
NANPU 1 FRL Air Filter Regulator Lubricator Combo With 0-150 Psi Gauge, 5 Micron Brass Element, Poly Bowl & Semi-Auto Drain - Metal Bracket Included
20 Review
π§ NANPU 1/2" NPT Compressed Air Filter Regulator Combo Piggyback with Auto Drain, 5 Micron Brass Element, Poly Bowl, Metal Bracket, and 0-150 psi Gauge
18 Review
NANPU DFR-02 1/4" NPT Air Drying System - Double Air Filters, Air Pressure Regulator Combo - Semi-Auto Drain, Poly Bowl
20 Review