I spoke to a Culligan service engineer and this person suggested using an awl (I used a drill) to widen the hole at the top of the filter slightly to allow for water flow to increase . He's humiliated by everything he's going through. With cheaper Culligan filters (D10 and D20) the flow is much higher but the filtration is much less. I don't trust municipal water anymore so I filter my drinking and cooking water with this system and have been happy with it and the customer service from Culligan.
NANPU Air Drying System With Double Filters And Pressure Regulator Combo For Clean And Controlled Air Supply
18 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 3/8" NPT Compressed Air Filter Regulator Combo Piggyback, 5 Micron Brass Element, Poly Bowl, Semi-Auto Drain, Metal Bracket, 0-150 Psi Gauge
26 Review
NANPU 1/2" NPT Air Drying System - 5 Micron Particulate Filter, 0.01 Micron Coalescing Filter, Air Pressure Regulator Combo - Semi-Auto Drain, Poly Bowl W/Metal Gauge
23 Review