Reducing a Water Pump
Shown below is what I use to reduce 2" semi-trash pumps to 1.5" hoses.
We also use the same setup to reduce 3" pumps to 2"
Reducing at the pump saves money on hose and bulk.
Also.... before you glue it up, MAKE SURE the handle clears the "roll cage" around the pump.
Otherwise you won't be able to screw it on. Yes, guilty as charged.
ALSO.... reducing the pump OUTFLOW will NOT damage the pump.
If someone has told you this... send them this article.
It's not that they're stupid... they are just passing down a MYTH.
It is actually GOOD for a pump.