You have to take the diaphragm housing off the assembley, so you can easily change the diaphragm at the bench, no problem with any screws.
You're suppose to pull the two pipes out at the right side,but I opted to release them at the left. So I removed the housing along with the pipes attached.
Yes you've got it, those are the screws. I think at the left side it only one screw holding a keep plate in position.
There may be a dribble of water to catch when the two pipes are withdrawn.
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