I didn't follow the instructions and just put the filter on the cap. Hole 1/4 (0.25) inch. You've been pressure cooker several times. at least 5. I installed them on solid stainless steel lids. Have washed the dishes several times, still holding up without problems. Although the price seems to be slowly increasing. I'm glad I got a few extras.
NANPU Compressed Air Filter Regulator Combo: Brass Element, Semi-Auto Drain, 0-150 Psi Gauge, And More
21 Review
Filter under the sink Aquaphor Favorit ECO silver
20 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 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