That's a motorized ball valve. Here is a 3 wire solution from that vendor. https://ussolid.com/motorized-ball-valve-1-2-stainless-steel-electrical-ball-valve-with-full-port-9-24v-dc-and-3-wire-setup-by-u-s-solid.html
I believe you are correct, that could save at little money thanks. The only difference one says made in China, the other says made in Yueqing, which is a city in China.
Anyone here use Auber Instruments' SSR's https://www.auberins.com/index.php?main_page=product_info&cPath=2_30&products_id=30 ? If so are they any good? Any failures?
Thanks!
Brundog, I know you posted this before but I can't seem to find it. What are the pro's and con's of each of the temperature sensors that are compatible with BruControl? Thanks
Here is a supplier that I use. They sell by the foot with a 10 foot minimum.
https://www.wireandcableyourway.com/8-4-soow-portable-cord-600v-non-ul.html?gclid=Cj0KCQjwqsHWBRDsARIsALPWMEOx5uBKYVLpCzrxTYNEIogAjaHBgTF-0oyA6qKyPzaXrsoxMadFxIEaAsCkEALw_wcB
I think the issue is not the 50A wire, but is the 50A spa panel. You can either replace it with a 30A GFCI which are expensive or install a normal 30A breaker immediately downstream of the 50A spa panel GFCI. The dryer outlet receptacle and probably the wiring can't handle 50A.