I removed a traditional water heater with 1" fittings and 3/4" pex to and from it with a on demand heater that has 1/2" fittings.

So I currently have 3/4" pex to the heater with 1/2" fittings. I have noticed a significant decrease in flow to the shower. Is there an easy way to resolve this?



Get a different water heater with larger fittings.

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