Water pressure regulator used to protect Dosatrons from pressure spikes. Made out of corrosion resistant stainless steel.
Factory set to maximum 5 bar. Supploied with liquid filled stainless steel pressure gauge.
To adjust, unscrew the bottom cap and use the allen key (provided) to turn up and down the pressure.
We have found that both Dosatrons work well at 5 Bar although this is a over the 4 bar max pressure recommended by Dosatron for the D3 RE25IE so it is recommended to reduce to 4 to keep warranty intact.
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