The unit is housed with 3/8" FPT (plastic) holding a 3/8MPT to 1/4 compression male (plastic). Do I have to step it down to 1/4 or can I use the 3/8" FPT? I'm wondering if putting too much pressure on the unit (by not bottlenecking it to 1/4"C) will cause it to function improperly. I don't care about the pressure in this regard. I'm getting the increase by using two units instead of the usual one. However, I do want to use less fittings.
What about exiting the units? If 1/4 C is the intake then that's the bottleneck, so at that point it shouldn't matter if I use 1/4"C or 3/8" FPT, right?
The faucet I have in mind is a single handle with standard 1/2 MPT.
Anyone know if the units themselves automatically act as a back flow preventer? If not I'd be worried unequal pressure might blow water back and forth from filtered to unfiltered water, not that I can see any terrible consequences.
advice or criticism welcomed thanks