I got 3/4"OD barbs for all my fittings and 5/8"OD tubing. This will give me 1/2" flow through out my entire system. Will the block be able to handle this? Also, the instructions that came with the pump said to never use teflon to seal the threads, but instead to use silicon. What exactly should I use? I don't want to seal the threads permanently, just create a leakproof seal.
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