| Dual filters are a good thing.
When you set it up have the outlet line of each filter go up into a loop. At the top of the loop install a tee with the leg facing up, put a valve on it. Then after this tee as the line goes back down install the isolation valve.
Then you can change a filter; bleed the air out of the line by opening the inlet isolation valve and cracking the valve at the top of the loop to let the air out.
I can swap a filter out in less than 5 minutes. I don’t use racors. I use giant sized truck filters, they are easier to swap out. They are available in any country and are inexpensive.
The bowl is larger and the filter surface area is much much larger. The boat I have has run for decades on them, no problems at all. I only change them and the fine filter on the engine every couple of years.
If you have a lot of blue mould in your tanks, which you should assume if you just bought the boat, they will not choke up in minutes as a racor will.
One boat I travelled with had to swap out his racor every 30 minutes in rolling seas.
The mould only breaks off the tank walls and gets sucked up when the fuel slops around.
Best Wishes, Tom
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