| Business | Phone |
| Bradford White 3111 W Mill Rd, Milwaukee 53209 | (414) 351-8708 |
| Hot Water Products 2830 W Stark St, Milwaukee 53209 | (414) 447-9593 |
| Tankless H20.Com-Takagi 237 S Curtis Rd, Milwaukee 53214 | (414) 258-2345 |
| Osten Inc 9745 W Schlinger Ave, Milwaukee 53214 | (414) 453-1515 |
| Paresources Inc 237 S Curtis Rd, Milwaukee 53214 | (414) 258-2366 |