@Retro Reefer - I know this is s a pretty old thread but in the 25 years, I have been in this hobby, I also started out using those Home depot valves which are absolute junk, after just about a yr of wear and tear on them they become very difficult to turn. See below which was my AETECH sump set up way back in 2001 with those Home depot ball valves b/c back then I am not sure if I have heard of Cepx valves or Spears Gate valves back in the day!
120 Mixed Reef Sump area:
After about 10 years of running this sump, I bought a new one from a company down South Ilussions who built me my custom sump, but this time I wanted everything hard plumbed and use all Cepex, Spears Vales and Wye check valves.
For my new build, I will be running 3 1.5inch drains with a Spears 1.5inch gate valve since I am running one of Synergy 20'' external overflow box and there Synergy CL-44 sump that I just got for the new build. In the end, always try to go with hard plumbing if you're not handy to have someone plumb your tank for you.
35 gallon Custom Sump
35 gallon Custom Sump hard plumbed
Rimless SCA150 Tank Incl. Brand new Synergy CL-44 Sump incl. Matching ATO Container and a Synergy 20'' External Overflow box
Doing a dry fit run