[PbFut]

I got pretty educated on these valve over last couple months. The 6 port and 3 port valve are identical. 3 port simply has the return 5/16 ports capped. So buy which ever is cheaper and cap or remove caps as needed. There is an internal switch for the guage sensors if needed. I am unsure if the switch is electronic or mechanical. I am experiencing intermittent signal from my guage senders but I suspect it is the sending units not the valve. This valve is sold under many names. All manufactured by same company. Oh and yes, filters in front of the valve on all 3 tanks. You dasie chain 2 valve to be able to select 3 tanks. You use a 3 position 4 pole rotary switch to control all 3 tanks.