What is this red circle used for?

2018-07-10View Original

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As shown in the diagram, there is a rubber stopper at the red circle. What is its purpose? Also, what does the pump model XHS150-125-400 mean?

Reply #22018-07-10

The rubber stopper is the fuel filling port, the fuel plug. 150 is the inlet diameter, 125 is the outlet diameter, 400 is the nominal diameter of the impeller

Reply #32018-07-10

If your pump is lubricated by an oil bath, this is the oil filling port (vent). If it is a self-lubricating pump, then you need to ask the manufacturer.

Reply #42018-07-10

It’s a solid rubber stopper; is it also a breathing cap?

Reply #52018-07-10

There’s no breathing mask? If it’s solid, then it’s not a breathing mask

Reply #62018-07-10

Why does the second image show it with breathing holes?

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What is this red circle used for?

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