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Self-priming automatic electric pumps with helical gears, produced by Marco.

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What is the thread size for the inlet and outlet ports?

What is the thread size, or designation, in the inlet and outlet ports?? I can’t find it anywhere.

Update 4-20-2021

I believe the model is GCF Marco UP3-R

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Hi @z1nonlyone ,

Here are the specifications for a Marco UP3-R pump.

Reading the specs it states: “The –R versions are fitted with a 3 positions switch for the inversion of flow direction”.

I assume that this means that it is reversible, and that the in and out ports would depend on which way the switch was thrown, but I may be wrong ;-)

Hopefully this is of some help.

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You're correct!

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