Those are all Home Depot and/or Lowe's parts, 3/8" NPT throughout. I used it for acid flushing but also as a post-sail engine flush before I had FWC. I put a 5 gallon bucket on the cabin sole and let the engine draw the water in via a shortened garden hose attached to the hose bib.

Hi Neal!
I'm admiring your "pre FWC" fresh water tee fitting on your water pump
Is that a collection Moyer parts or something Home Depot-ized? I ask because aside from wanting one for future engine flushes, my raw water through-hull just broke off in my hand a couple weeks ago so I'll need to do my post-overhaul preliminary engine runs with a different source of water until I can get the through-hull sorted out.

Thanks!
Jonathan AKA Launchpad McQ