Small Flow regulators -- how they work.

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Reach4

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Many faucets have a flow regulator that limits flow rate despite some pressure change. I wondered how they worked, and this link explained it for me:
http://www.neoperl.net/en/oem/products/flowregulators/workingprinciples.html

A water softener has 2 "buttons": DLFC (Drain line flow control) and BLFC (brine level fill control).

DLFC controls the backwash rate. BLFC controls the brine tank refill rate, which allows a time to control how much salt will get used in the next regeneration. I suspect the BLVC and DLFC buttons work the same way as the faucet flow controls.

I have increased flow in a 1 GPM kitchen faucet aerator by removing the O-ring. Taking the cartridge apart to remove the O-ring took some force.
 
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