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Hello my name is Wade and I look forward to helping you!
I think you've done everything right, but may have broken some debris free that's caught in the facet or cartridge. To confirm this unhook faucet from supply valves and see if you have good pressure there.
Did I state that so it makes sense?
I removed the faucet head, flushed the water lines and cleaned the screen to remove any debris that was in the lines. This helped as I only had a trickle when I first tested. After flushing the lines and cleaning the fixture screen, I now have closing water but the pressure , while minimally acceptable, is still much less than every other fixture in the house using copper lines.
I can guarantee it's not because of the PEX. Did you check pressure at valves under sink? This will eliminate the faucet from the equation. If you have good pressure under the sink then you have debris in the faucet. Generally this happens at the cartridge. If you do not have good pressure under the sink then you most likely have debris at the stop valves.
Thanks. I will check the pressure tonight after work. I'll also test with another fixture that is new and therefore not clogged with debris.
Ok let me know
How was it?
It ended up being debris in the lines. Thank you.
I'd appreciate a positive rating for helping you out