location of pressure gauge

[dga]

i purchased a pressure gauge for my r.o. system to monitor the membrane along with a tds meter. what line does the gauge get plumbed into. the input line, waste line or filtered line?

[zanemoseley]

I think the input should be ok however my typhoon is plumbed into the filter I think. Definately not the waste line as its low pressure.

[Paintbug]

i have my pressure gauge on the input line.