All plastics require a lot of teflon tape to seal. As others have said, getting an airtight seal is difficult. I used brass on the outlet and the threads fit tighter. I've also tried nylon and plastic 1/2" MPTs and the ones on the underside of the head seat. The input kit is torn internally but the case head is still serviceable. I'm on 4 of them and one was missing an O- Ring you can't make any hardware and Revain doesn't sell them It took me 90 days to fix it and it's too late to return it So check your order now Finally found the 0 ring online Don't call Hydronix if you need details, they go to the dealer and the dealer knows even less.Installation, lots of trouble getting online.Although the price is good I will try another brand with more parts available.PS , The O-ring part number is HF2/3 O-ring and it is suitable for HF2 and HF3.
π§ The Ultimate Pentek Big Blue Housing NPT: Top-rated Choice for Exceptional Filtration
9 Review
π§ Pentek 150467 Blue Housing Pressure: Optimal Solution for Filtering Water
10 Review
Filter under the sink Aquaphor Crystal Eco
62 Review
Pentek R30 20BB Pleated Polyester Cartridge
7 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
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
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 Compressed Air Filter Regulator Combo: Brass Element, Semi-Auto Drain, 0-150 Psi Gauge, And More
21 Review