Well I installed two Watts PL-3028 SpeedFit things. One just before the pump and one just after the filter. I also replace the stock flow control valve with a 3/8 SpeedFit one. Believe it or not, I see no appreciable difference in the flow indicator. Even with the valve wide open, I'm barely exceeding #2. So as a test, I removed the check valve on the suction side, and I can pull a 4. Seems weak to me, for a 1.5 single speed Hayward pump. I reinstalled the check valve temporarily, until I can get a 3/8 one online from US Plastics. So here's my other upgrade idea..... I think I will remove the barb fittings from the flow meter and replace them with Watts PL-3025. That will give me 3/8 in and out other flowmeter. Anyone else done this?
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