You mentioned your home wiring could be an issue. If you are having issues with the units just plugged into the wall, you may be able to reduce the hum using the Furman Strip. I like the Furman board because it reduces the number of wall warts you require due to the internal plugs that come with it. If the pedal has a non standard specific wall wart then it also has separate conditioned plugs ins for those.
It was kind of a tongue in cheek remark that my wife had caused me a whole day of misery because she unplugged my board from the wall and used a power strip.
I would recommend you try the Furman strip. It has all of the hum cancelling technical enhancements of the board. I also have only the best hum cancelling cables and
I use only Fulltone pedals due to their true bypass and bullet proof electronics. I am somewhat anal about hum, and I have pretty well eliminated most of it.
I hope this helps. Good quality cables do help as well.
sorry about delay but I gave a house full of guests for the hoidays.
The Blues is alright!
Guitars: 1968 Gibson SG, 2005 Gibson SG Standard, 2006 Gibson LP Classic Gold top, 2004 Epiphone Elitist LP Custom, 1996 Gibson Les Paul Standard. 2001 Epiphone Sheraton II, 2007 Epiphone G400.
Fender Strats: 1996 Fender 68 Reissue CIJ, 2008 Squier CV 50s, 2009 Squier CV 50s Tele Butterescotch Blonde
Amps: Blues Junior Special edition Jensen in Brown Tolex with Wheat front, 65 Deluxe Reverb reissue,1970 Sonax reverb by Traynor, Avatar Custom 2/12 Cabinet with Eminence Legend V1216 speakers,
2008 DSL100 Marshall Amp , Fender Super Champ XD,Fender Vibro Champ XD
Effects and Pedals: Fulltone Fulldrive II, Fulltone OCD, Fulltone Mini Deja Vibe, Fulltone Fat Boost, Dunlop Crybaby Wah, Boss DS1, Boss DD20 Giga Delay, Boss TU2 tuner, Boss BD2, Ibanez TS9 Tube screamer, Zoom 505. Radial tonebone hot british.