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Hello all, I have a Pentair 300 chlorinator and want to install a flow meter R172080 just to make sure I always have flow. Thst one has a check valve in it. I see no install instructions any where online. My question is, do I install in the line? Do I do away with the check valve in the...

Just replaced our 14 year old heater with exact but new Maxi Therm 333LP. Heater lights perfectly, but burner sounds a bit muffled and it seems the water coming out is not near as warm as old one (before core went south). Reading the troubleshooting ,it says to check gas pressure or replace...